subject:(Feeding dairy cattle)

Michigan State University

1. Lu, Yongfang. Quantitative genetic and genomic modeling of feed efficiency in dairy cattle.

Degree: 2016, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:4342

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Thesis Ph. D. Michigan State University. Animal Science 2016

"Residual feed efficiency (rFE) is an increasingly important novel trait for maintaining the economic and environmental… (more)

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Thesis Ph. D. Michigan State University. Animal Science 2016

"Residual feed efficiency (rFE) is an increasingly important novel trait for maintaining the economic and environmental sustainability of dairy cattle production. Given that rFE is a derived trait based on the key energy source trait, dry matter intake (DMI), and key energy sink traits like milk energy (MILKE) and metabolic body weight (MBW), a more thorough quantitative genetic study of rFE would provide important baseline knowledge for dairy cattle management. A dairy consortium dataset focused on eventually developing genetic evaluations for rFE in US Holsteins, has been collected on DMI, MILKE, and MBW records from nearly 7000 dairy cattle in four countries. My dissertation was designed to address some motivating quantitative genetic research questions that could be addressed from the analyses of this dataset. In Chapter 2, I reassessed the merit of using residual feed intake (RFI), defined as the estimated residual from regressing DMI on energy sink traits, as a measure of rFE, given that it is most commonly used in dairy cattle breeding research. We proposed a multiple trait (MT) modeling strategy involving all of the component traits, demonstrating that the use of the Cholesky Decomposition (CD) on the genetic and residual variance-covariance matrices lead to a more potentially flexible quantitative genetic approach to modeling rFE compared to RFI. The advantages of this MT approach were confirmed by simulation when the genetic versus residual relationships between energy sink and source traits were rather divergent. However, there appeared to be no meaningful differences in quantitative genetic inferences when applied to the dairy consortium dataset. Similar conclusions on non-distinctions between the two models for genome wide association (GWA) analyses were also drawn in Chapter 4 although the MT GWA analyses shed further light that quantitative genetic inferences on DMI are distinctly independent of those on rFE. I also investigated heterogeneous genetic relationships across environments for rFE with two broadly different approaches. In Chapter 3, I extended the MT model to discover substantial heterogeneity in genetic and residual partial efficiencies and variance components defining rFE as functions of environmental and management factors. Subsequently, I inferred upon genotype by environment interaction at the genomic level across environment conditions in Chapter 5, determining that some genomic regions are sensitive to environmental covariates such as average production and temperature." – Pages ii-iii.

Description based on online resource;

Advisors/Committee Members: Tempelman, Robert, VandeHaar, Mike, Steibel, Juan, Bello, Nora, Finley, Andrew.

Subjects/Keywords: Dairy cattle – Feed utilization efficiency; Dairy cattle – Genetics; Dairy cattle – Feeding and feeds; Agriculture; Genetics

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APA (6^th Edition):

Lu, Y. (2016). Quantitative genetic and genomic modeling of feed efficiency in dairy cattle. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:4342

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lu, Yongfang. “Quantitative genetic and genomic modeling of feed efficiency in dairy cattle.” 2016. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:4342.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lu, Yongfang. “Quantitative genetic and genomic modeling of feed efficiency in dairy cattle.” 2016. Web. 01 Mar 2021.

Vancouver:

Lu Y. Quantitative genetic and genomic modeling of feed efficiency in dairy cattle. [Internet] [Thesis]. Michigan State University; 2016. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:4342.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lu Y. Quantitative genetic and genomic modeling of feed efficiency in dairy cattle. [Thesis]. Michigan State University; 2016. Available from: http://etd.lib.msu.edu/islandora/object/etd:4342

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

2. Subramaniam, Elango. Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows.

Degree: MS, Department of Agricultural, Food, and Nutritional Science, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/th83kz633

► Effects of dietary starch content on ovarian dynamics in lactating dairy cows and intrafollicular milieu of preovulatory follicles were studied. Diets containing two levels of… (more)

Subjects/Keywords: Starch; Dairy cattle – Feeding and feeds; Dairy cattle – Reproduction

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APA (6^th Edition):

Subramaniam, E. (2011). Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/th83kz633

Chicago Manual of Style (16^th Edition):

Subramaniam, Elango. “Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows.” 2011. Masters Thesis, University of Alberta. Accessed March 01, 2021. https://era.library.ualberta.ca/files/th83kz633.

MLA Handbook (7^th Edition):

Subramaniam, Elango. “Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows.” 2011. Web. 01 Mar 2021.

Vancouver:

Subramaniam E. Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2021 Mar 01]. Available from: https://era.library.ualberta.ca/files/th83kz633.

Council of Science Editors:

Subramaniam E. Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/th83kz633

3. Shipandeni, Maria Ndakula Tautiko. Modulation of starch digestion for productive performance in dairy cows.

Degree: PhD, Animal Sciences, 2019, Stellenbosch University

URL: http://hdl.handle.net/10019.1/106121

► ENGLISH ABSTRACT: In this thesis, a series of experiments were conducted to ultimately investigate the effects of modulating site of starch digestion by varying ruminal… (more)

▼ ENGLISH ABSTRACT: In this thesis, a series of experiments were conducted to ultimately investigate the effects of modulating site of starch digestion by varying ruminal fermentability of various starch sources on feed intake, production and metabolic response of transition cows. The first experiment was performed (Chapter 3) to evaluate the effects of different particle sizes on chemical composition and in vitro ruminal starch degradability of cereal grains commonly used in dairy cow diets. Four starch sources (maize 1 and 2, sorghum, barley and wheat) were ground through 1 and 2-mm screens and fractionated by sieving to obtain the following sizes: <250 (very fine), 250-500 (fine), 500-1180 (medium) and 1180-2000 μm (coarse). The generated particle size fractions and unsieved samples were separately analysed for chemical composition and fermented in vitro using rumen fluid for 0, 3, 6, 9, 12 and 24 h to determine starch degradability (Sd), and rate of starch degradation (kd), assuming a first order decay. Particle size affected (P<0.0001) the chemical composition of all grains, with the highest starch in the smallest particles and highest NDF in the largest particles. For all grains, Sd and kd increased with decreasing particle size. Results from this in vitro study suggest that starch digestion could be potentially shifted post-rumen by controlling particle size and reducing the amount fermented in the rumen. In Chapter 4 (experiment 2), we compared two mathematical approaches for determining the rate of starch degradation. The objective was to evaluate the accuracy and precision of the 7 h-kd’s by comparison with rates obtained using a non-linear first order decay model as a reference. Higher accuracy and precision were obtained by using a non-linear estimation. There is a need for using a non-linear estimation, using multiple time points or the development of alternative estimations, especially when quantifying rates of starch ddegradation for high producing cows. Experiment 3 was performed (Chapter 5) to quantify the potential of a starch binding agent (BioProtect™) to reduce in vitro rumen starch degradation of cereal grains of varying particles size. Maize and sorghum fractions used in experiment 1 were treated by spraying with BioProtect™ 24 h before in vitro fermentation to quantify starch degradability (Sd). Both treated and untreated (no BioProtect™) maize and sorghum samples were fermented in vitro. BioProtect™ was effective in decreasing starch degradability for both grains, with effects more pronounced for smaller particle sizes, by reducing Sd 17%-units compared to 7%-units for the largest particles. Simulations with the NDS software indicated that the use of BioProtect™ can reduce rumen starch digestibility, increase rumen starch escape and post rumen starch digestibility. Simulated total tract digestibility was not decreased by the use of BioProtect™ and indicated slightly reduced microbial protein production. Although BioProtect™ showed positive effects on reducing rumen starch degradation, in our… Advisors/Committee Members: Raffrenato, Emiliano, Cruywagen, Christiaan W., Esposito, Giulia, Stellenbosch University. Faculty of Agrisciences. Dept. of Animal Sciences..

Subjects/Keywords: Dairy cattle – Feeding and feeds; Starch digestion; Dairy cows – Breeding; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shipandeni, M. N. T. (2019). Modulation of starch digestion for productive performance in dairy cows. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/106121

Chicago Manual of Style (16^th Edition):

Shipandeni, Maria Ndakula Tautiko. “Modulation of starch digestion for productive performance in dairy cows.” 2019. Doctoral Dissertation, Stellenbosch University. Accessed March 01, 2021. http://hdl.handle.net/10019.1/106121.

MLA Handbook (7^th Edition):

Shipandeni, Maria Ndakula Tautiko. “Modulation of starch digestion for productive performance in dairy cows.” 2019. Web. 01 Mar 2021.

Vancouver:

Shipandeni MNT. Modulation of starch digestion for productive performance in dairy cows. [Internet] [Doctoral dissertation]. Stellenbosch University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10019.1/106121.

Council of Science Editors:

Shipandeni MNT. Modulation of starch digestion for productive performance in dairy cows. [Doctoral Dissertation]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/106121

Stellenbosch University

4. Neethling, Kathleen Elizabeth. The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages.

Degree: MScAgric, Animal Sciences, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/100195

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ENGLISH ABSTRACT: Digestibility of fibre from the roughage component of total mixed rations for dairy cows can be influenced by the source of supplemental energy… (more)

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ENGLISH ABSTRACT: Digestibility of fibre from the roughage component of total mixed rations for dairy cows can be influenced by the source of supplemental energy and nitrogen included in the ration. By optimizing the digestion of fibre in the rumen, dairy cows can utilize the potential nutrients in roughages to its best, and thereby obtain more substrates for optimal production. This thesis reports on two in vitro studies aimed to improve forage digestion. In the first study, a high quality forage (lucerne hay) and a poor quality forage (wheat straw) were incubated in vitro with the filter bag method with an energy source, being either maize, citrus pulp or molasses syrup and a nitrogen source, being either soybean meal, urea or no added N. The forage samples were weighed out to provide 125 mg NDF and transferred to Ankom filter bags. Bags were heat sealed and incubated in Erlenmeyer flasks for six and 30 hours at 39ºC. Energy sources were added to the incubation medium in the respective flasks and amounts were calculated to supply a metabolisable energy equivalent of 125 mg of pure starch. The amounts of the respective N sources were calculated to provide 21 mg of N per flask. Dry matter and NDF disappearance values were calculated. There was no treatment that increased DM disappearance significantly in either of the two forage sources after six or 30 hours of fermentation. The highest NDF disappearance values for LH treatments were observed in the LHCU and LHCSB treatments, after six and 30 hours, respectively. With WS as substrate, the highest NDFD values were observed in the WSCSB and WSSSB, at six and 30 hours, respectively. In the second study, the same sources were used as in the first study. Total mixed rations were simulated in which roughage was included at 229 g DM, energy sources at 188 g DM and nitrogen sources calculated to supply 21 mg N. The sample diets were incubated in sealed flasks with rumen fluid and incubation medium for 30 hours. During the incubation period, gas production was measured at regular intervals. After termination of the incubation the same digestion parameters were measured as in the first study. The highest DM disappearance was seen in LHMU and WSSSB for the two forage sources respectively. The combinations that showed the highest NDF disappearance values were M*U and S*U for lucerne hay, and S*SB for wheat straw. In both LH and WS, the highest amount of gas produced was present when M served as energy source and U as nitrogen source. It was concluded that the various combinations of forages, energy and nitrogen sources affected forage digestibility differently and knowledge thereof can be of value in formulating ruminant total mixed rations.

AFRIKAANS OPSOMMING: Verteerbaarheid van vesel uit die ruvoer komponent van totale gemengde rantsoene vir melkkoeie kan beïnvloed word deur die bron van aanvullende energie en stikstof in die rantsoen. Deur die vertering van vesel in die rumen te optimaliseer, kan melkkoeie ten volle gebruik maak van die voedingstowwe in ruvoere, om…

Advisors/Committee Members: Cruywagen, Christiaan Wilhelm, Stellenbosch University. Faculty of Agrisciences. Dept. of Animal Sciences..

Subjects/Keywords: Dairy cattle – Nutrition; Dairy cattle – Feeding and feeds; Dairy cows – Forage digestion; Ruminants – Feeding and feeds; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Neethling, K. E. (2016). The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/100195

Chicago Manual of Style (16^th Edition):

Neethling, Kathleen Elizabeth. “The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages.” 2016. Masters Thesis, Stellenbosch University. Accessed March 01, 2021. http://hdl.handle.net/10019.1/100195.

MLA Handbook (7^th Edition):

Neethling, Kathleen Elizabeth. “The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages.” 2016. Web. 01 Mar 2021.

Vancouver:

Neethling KE. The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages. [Internet] [Masters thesis]. Stellenbosch University; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10019.1/100195.

Council of Science Editors:

Neethling KE. The effect of different energy and nitrogen sources on in vitro fibre digestion and gas production kinetics of high and low quality forages. [Masters Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/100195

Michigan State University

5. Sun, Yan (Graduate of Michigan State University). Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression.

Degree: 2016, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:4217

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Thesis Ph. D. Michigan State University. Animal Science 2016

"Yield of milk components continues to be the principal driver of variation in producer milk payments.… (more)

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Thesis Ph. D. Michigan State University. Animal Science 2016

"Yield of milk components continues to be the principal driver of variation in producer milk payments. Therefore, diet-induced milk fat depression negatively impacts financial income of dairy farmers. Our overall objective is to determine the effects of dietary factors and rumen pH and their interactions on biohydrogenation pathways and the formation of biohydrogenation intermediates (e.g. t10, c12 conjugated linoleic acid, [CLA]) that limit fat synthesis in the mammary gland. By using an in vitro batch culture system in the first three experiments, we determined the effects of common dietary factors (dietary unsaturated fatty acid concentration, starch content and starch fermentability, and Saccharomyces cerevisiae fermentation product) and culture pH on biohydrogenation pathways, as well as their interactions. In all three experiments, culture pH had the greatest influence on biohydrogenation pathways, with low culture pH increasing the formation of t10, c12 CLA in vitro. In the first experiment, low culture pH and increasing concentration of corn oil increased the formation of t10, c12 CLA. Increasing corn oil concentration at low culture pH increased t10, c12 CLA concentration. In the second experiment, low culture pH, combined with highly fermentable starch (high moisture corn), increased t10, c12 CLA concentration. Although starch fermentability did not affect t10, c12 CLA overall, high starch content provided by high moisture corn increased t10, c12 CLA concentration at low culture pH. In the third experiment, highly fermentable starch (high moisture corn) at low culture pH increased t10, c12 CLA concentration. Rumen fluid collected from cows supplemented with Saccharomyces cerevisiae fermentation product decreased t10, c12 CLA concentration, especially when combined with high moisture corn at low culture pH. The fourth experiment was an in vivo study, which determined the effect of production level on severity of diet-induced milk fat depression and biohydrogenation pathways for mid- and late lactation cows. A milk fat depression-inducing diet decreased milk fat content and fat yield, and increased t10, c12 CLA concentration in milk. Higher producing cows were at higher risk for diet-induced milk fat depression, exhibiting greater reductions in milk fat content and yield and a greater increase in milk t10, c12 CLA concentration than lower producing cows. Cows fed a milk fat depression-inducing diet had a lower mean rumen pH and greater rumen pool of t10, c12 CLA than cows fed a control diet. Dietary factors interacted with rumen pH to influence biohydrogenation pathways and t10, c12 CLA concentration, and production level also impacted cow response to diet-induced milk fat depression. Further work is required to clarify interactions between dietary factors and rumen pH and their effects on rumen bacterial populations. Mechanisms behind the interaction between production level and diet induced-milk fat depression are still unclear and should be…

Advisors/Committee Members: Lock, Adam L, Allen, Michael, Herdt, Thomas, Michael, Vandehaar, Elizabeth, Karcher L.

Subjects/Keywords: Dairy cattle – Diseases – Nutritional aspects; Milkfat; Dairy cattle – Feeding and feeds; Rumen; Animal sciences

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APA (6^th Edition):

Sun, Y. (. o. M. S. U. (2016). Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:4217

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sun, Yan (Graduate of Michigan State University). “Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression.” 2016. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:4217.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sun, Yan (Graduate of Michigan State University). “Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression.” 2016. Web. 01 Mar 2021.

Vancouver:

Sun Y(oMSU. Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression. [Internet] [Thesis]. Michigan State University; 2016. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:4217.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sun Y(oMSU. Effects of dietary factors and rumen pH on rumen biohydrogenation pathways and risk of milk fat depression. [Thesis]. Michigan State University; 2016. Available from: http://etd.lib.msu.edu/islandora/object/etd:4217

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

6. Kammes, Kimberly L. Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows.

Degree: 2012, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:573

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Thesis Ph. D. Michigan State University, Animal Science 2012.

EFFECTS OF FORAGE CHARACTERISTICS AND VOLUNTARY FEED INTAKE ON RUMINAL PASSAGE OF DIGESTA FRACTIONS IN LACTATING… (more)

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Thesis Ph. D. Michigan State University, Animal Science 2012.

EFFECTS OF FORAGE CHARACTERISTICS AND VOLUNTARY FEED INTAKE ON RUMINAL PASSAGE OF DIGESTA FRACTIONS IN LACTATING DAIRY COWSByKimberly L. Kammes Passage from the rumen is a dynamic, complicated process that involves numerous animal and feed factors. Ruminal passage rates affect intake, digestibility, and the amount and type of fermentation endproducts and protein available to dairy cows. The success of existing nutrition models is limited by the lack of data for passage rate of individual digesta fractions, and the inability to account for effects of feed intake and forage characteristics of passage rates of specific feed fractions. These limitations can be addressed using the pool and flux method, which allows measurement of rates of passage for fractions within feeds, and an experimental design optimized to assess the interactions of diet characteristics and dry matter intake (DMI). Five experiments were conducted to evaluate the effects of level of feed intake on the response of passage rate of digesta fractions in dairy cows to forage characteristics. All experiments utilized ruminally and duodenally cannulated cows with a wide range of DMI in a crossover design, where DMI was measured during a preliminary period (pDMI), and rates of digestion and passage of feed fractions were determined by the pool and flux method. The use of pDMI, an index of nutrient demand, allowed the evaluation of treatments on animal responses in relation to level of intake and effects of intake level independent of treatments. Level of intake ranged from approximately 20 to 30 kg dry matter per day among cows on the five experiments, and each experiment evaluated individual pairs of forage treatments including: 1) legume particle size, 2) grass particle size, 3) legume maturity, 4) grass maturity, and 5) forage family. Alfalfa and orchardgrass were selected as a representative legume and grass, respectively, and were the sole source of forage used in diets, which were formulated to contain a similar forage neutral detergent fiber concentration among diets within experiment. We hypothesized that the normal variation in diet characteristics related to forage alters both the passage rates of feed fractions and the extent to which passage rates of these fractions are affected by voluntary DMI. In general, it has been accepted that ruminal passage rates, microbial nitrogen flow to the duodenum, and efficiency of microbial synthesis increase with DMI; however, this is likely an oversimplification based on our research. Results from these experiments demonstrated passage rates of individual digesta fractions from the rumen were highly variable at a given level of voluntary DMI across cow periods, depended upon the forage characteristic being evaluated, and were inconsistent among the forage treatments evaluated. Additionally, microbial efficiency was not related to level of intake but was related to other factors, which varied among the experiments and included passage rates of…

Advisors/Committee Members: Allen, Michael S, Bucholtz, Herbert, Herdt, Thomas, Romsos, Dale, Weber Nielsen, Miriam.

Subjects/Keywords: Forage plants; Dairy cattle – Nutrition; Dairy cattle – Feeding and feeds; Digestion; Lactation; Animal sciences

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APA (6^th Edition):

Kammes, K. L. (2012). Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:573

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kammes, Kimberly L. “Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows.” 2012. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:573.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kammes, Kimberly L. “Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows.” 2012. Web. 01 Mar 2021.

Vancouver:

Kammes KL. Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:573.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kammes KL. Effects of forage characteristics and voluntary feed intake on ruminal passage of digesta fractions in lactating dairy cows. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:573

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Svinurai, Walter. Manure production and nutrient management in pasture-based dairy production systems.

Degree: Faculty of Science and Agriculture, 2010, University of Fort Hare

URL: http://hdl.handle.net/10353/475

► Manure production and nutrient management in pasture-based dairy production systems by Walter Svinurai The effect of dietary treatments on nutrient excretion was determined and an… (more)

▼ Manure production and nutrient management in pasture-based dairy production systems by Walter Svinurai The effect of dietary treatments on nutrient excretion was determined and an attempt to improving the retention of excreted nitrogen in stored manure using Aloe ferox leaf gel (AFLG) and pine bark was conducted at a pasture-based dairy farm. The animal mass-balance method was used to determine nutrient excretion by cows fed on three dietary treatments, Lolium perrene-based treatment (LP), Lolium multiforium-based treatment (LM) and Lolium perenne- Trifolium repens -based treatment (LTF). In separate experiments, slurry from dairy cows fed LM was amended with AFLG and pine bark at concentrations of 25, 50, 75 and 100 g/l and stored under anaerobic conditions for 16 days. The highest and lowest excretions of N, P and K were observed in LM and LP treatments, respectively. Increasing dietary N improved K and N retention in milk and, consequently increased milk urea nitrogen (MUN) and N excretion (P < 0.05). The concentrations of AFLG affected N and P retention in manure (P < 0.05). The highest retention in total Kjeldahl nitrogen (TKN) of the initial was 42% AFLG at 25g/l inclusion rate. Ammonium nitrogen (AMN) concentration increased significantly due to the interactive effect of AFLG inclusion rate and time. Pine bark powder significantly improved N and P retention in manure at all concentrations. The retention in TKN was higher (P < 0.05) at 25g/l pine bark powder than other concentrations. The interaction effect of inclusion rate and time increased iii AMN (P < 0.05). Dietary treatments significantly affected nutrient excretion, and AFLG and pine bark considerably improved N retention in stored slurry. Findings from the filed trial suggest the need for more attention on managing dietary nutrients in the post-rainy and cool-dry season when growth of pasture influenced choice of dietary treatments that led to high nutrient excretion. Field simulation of the additives to determine their efficacy and environmental hazards was recommended. Key words: Aloe ferox leaf gel, dietary treatments, nitrogen, nutrient excretion, pine bark Advisors/Committee Members: Prof. V. Muchenje, Prof. P. Muchaonyerwa, Prof. M. Chimonyo.

Subjects/Keywords: Manures; Nitrogen – Metabolism; Aloe – South Africa; Pine bark; Pastures; Dairy cattle – Nutrition; Dairy cattle – Management; Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Svinurai, W. (2010). Manure production and nutrient management in pasture-based dairy production systems. (Thesis). University of Fort Hare. Retrieved from http://hdl.handle.net/10353/475

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Svinurai, Walter. “Manure production and nutrient management in pasture-based dairy production systems.” 2010. Thesis, University of Fort Hare. Accessed March 01, 2021. http://hdl.handle.net/10353/475.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Svinurai, Walter. “Manure production and nutrient management in pasture-based dairy production systems.” 2010. Web. 01 Mar 2021.

Vancouver:

Svinurai W. Manure production and nutrient management in pasture-based dairy production systems. [Internet] [Thesis]. University of Fort Hare; 2010. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10353/475.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Svinurai W. Manure production and nutrient management in pasture-based dairy production systems. [Thesis]. University of Fort Hare; 2010. Available from: http://hdl.handle.net/10353/475

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Stellenbosch University

8. Van der Vyver, Anesme. Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows.

Degree: MScAgric, Animal Sciences, 2019, Stellenbosch University

URL: http://hdl.handle.net/10019.1/105923

► ENGLISH ABSTRACT: Climate in the southern Cape region of South Africa permits dairy farmers to make use of cultivated pasture as their main nutrient and… (more)

▼ ENGLISH ABSTRACT: Climate in the southern Cape region of South Africa permits dairy farmers to make use of cultivated pasture as their main nutrient and feed source for dairy cows. A commonly used pasture system in this region is kikuyu over-sown with ryegrass. Pasture has a limited supply of nutrients which necessitates the need to provide dietary supplementation in a concentrated form. Concentrates consists primarily of maize grain which is a highly priced product containing a high starch content. Including alternative feed ingredients with lower starch content, higher level of digestible fibre and possibly a lower cost in concentrates may improve milk production and milk composition. Soybean hulls are one of many by-products which are considered as an alternative to maize. The hulls are a by-product after processing of soybeans for oil and meal, and are high in energy, crude protein (CP) and fibre which make it a possible alternative to maize in dairy feed as it is digested more efficiently by ruminants. The aim of this study was to determine the effect of partial substitution of a maize in a dairy concentrate with soybean hulls, on milk production, milk composition, digestion of kikuyu-ryegrass pasture and rumen environment. Fifty-one lactating Jersey cows from Outeniqua Research Farm were blocked according to mean milk yield, days in milk (DIM) and lactation number for the production study. Cows used were between 127 ± 50.5 DIM. A complete randomised block design was used. Cows within each block were randomly allocated to one of the three treatments. Treatments were defined according to the level of soybean hulls included in the concentrate supplement: SH0, SH15 or SH30 containing respectively 0%, 15% or 30% soybean hulls. Cows were fed 6 kg/day (3 kg per milking session) concentrates. After each milking session the cows grazed fresh kikuyu-ryegrass pasture allocated at ± 13 kg dry matter (DM)/cow per day. There were no significant differences (P > 0.05) in milk yield, 4% fat corrected milk (FCM) and energy corrected milk (ECM) between treatments. Milk fat tended (P = 0.06) to increase when 15% soybean hulls were included. Milk protein and lactose percentages increased significantly (P < 0.05) when soybean hulls were included (15 and 30%) in the concentrates. Somatic cell count (SCC) did not differ significantly between treatments. The milk urea nitrogen (MUN) content (8.30 – 9.36 mg/dL) indicated that sufficient protein was supplied to cows on all treatments. Cows on all three treatments gained weight and improved in condition during the study. Live weight of cows did not differ between treatments. Body condition improved (P < 0.05) when 15% soybean hulls were included indicating sufficient energy supply. Nine ruminally cannulated cows from the Outeniqua Research Farm were used for the rumen study. A 3 x 3 Latin square design was used, where all cows were subjected to all three treatments. In each period, cows were randomly allocated to one of the three treatments. Cows were fed 6 kg/day (3 kg per milking… Advisors/Committee Members: Meeske, R., Cruywagen, C. W., Stellenbosch University. Faculty of Agrisciences. Dept. of Animal Sciences..

Subjects/Keywords: Dairy cattle – Nutrition; Dairy cattle – Feed utilization efficiency; Dairy cattle – Feeding and feeds; Soybean as feed; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Van der Vyver, A. (2019). Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/105923

Chicago Manual of Style (16^th Edition):

Van der Vyver, Anesme. “Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows.” 2019. Masters Thesis, Stellenbosch University. Accessed March 01, 2021. http://hdl.handle.net/10019.1/105923.

MLA Handbook (7^th Edition):

Van der Vyver, Anesme. “Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows.” 2019. Web. 01 Mar 2021.

Vancouver:

Van der Vyver A. Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows. [Internet] [Masters thesis]. Stellenbosch University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10019.1/105923.

Council of Science Editors:

Van der Vyver A. Partial substitution of maize with soybean hulls in a concentrate supplement for grazing dairy cows. [Masters Thesis]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/105923

Michigan State University

9. Gualdrón-Duarte, Laura Bibiana. Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period.

Degree: 2017, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:6662

► "Feeding behavior (FB) and dry matter intake (DMI) of ruminants has been linked to hepatic oxidation of fuels. The type and temporal pattern of fuels… (more)

▼ "Feeding behavior (FB) and dry matter intake (DMI) of ruminants has been linked to hepatic oxidation of fuels. The type and temporal pattern of fuels absorbed from the gastrointestinal tract of ruminants and available for oxidation are affected by diet starch concentration and fermentability. However, research considering the fuels produced from starch digestion is lacking for cows in the postpartum (PP) period. Our overall hypothesis is that fuels produced during digestion affect hepatic metabolism and FB differently. To investigate the effect of anaplerosis of the tricarboxylic acid (TCA) cycle on FB, experiments were conducted using cows in PP period. Propionic acid (PA, 99.5%) and glycerol (GL, 99.7%) were infused into the abomasum (AB) in isoenergetic (193 kcal/h) and isomolar (0.03035 mol/h) solutions using a double crossover design. Infusion of PA decreased DMI compared with GL 17 and 23%, by decreasing meal size 13 and 15% with isoenergetic and isomolar infusions respectively, and PA decreased total metabolizable energy intake (MEI, diet plus treatment infusions) compared with GL. Compared with PA, GL increased plasma glucose and insulin concentrations for isomolar infusions. Pulse-dose (2 moles) of PA into the AB in a crossover design decreased hepatic acetyl CoA (AcCoA) content whereas GL increased 32%, resulting in lower content for PA compared with GL at 30 min (18.0 vs. 36.9 nmol/g), which persisted at 60 min after dosing (21.9 vs. 32.8 nmol/g). These results are consistent with anaplerosis from PA stimulating oxidation of AcCoA in the liver and satiety compared with GL. To investigate the effect of fuels from starch digestion on FB, continuous isoenergetic AB infusions (150 kcal/h) of PA (99.5%, 0.41 mol/h), lactic acid (LA, 88.0%, 0.46 mol/h) or glucose (GLU, 99.9%, 0.22 mol/h) were studied with cows in PP period in a duplicated 4 x 4 Latin square design. A control (CON, no infusion) treatment was also included. Treatment solutions were infused at 500 mL/h for 22 h/d and provided 3.03033 Mcal/d. Compared with CON, PA decreased DMI by 24% (14.3 vs. 18.9 kg/d) and MEI by 13% (34.8 vs. 40.2 Mcal/d) by a tendency to decrease meal frequency; and LA decreased DMI by 14% (16.3 vs. 18.9 kg/d) by decreasing meal size 20%, but did not affect MEI. Glucose infusion did not affect DMI or MEI. While ruminal infusions of sodium acetate have little effect on DMI, infusion of acetic acid (AA) into the AB of cows in the PP period decreased DMI 64% compared with a sham control (Gualdrón-Duarte and Allen, unpublished). To understand the mechanism, we investigated the effects of continuous isomolar infusions (0.030375 mol/h; 0.5 L/h; 8 h) of AA, sodium acetate (NA) or CON (NaCl) into the rumen (RU) or into the AB on FB, DMI, and metabolic responses of cows in the PP period in a 6 x 6 Latin square design. Treatments were infused for the first 8 h following feeding with a rest day between infusion days. During infusions treatments decreased DMI 30% (4.3 kg vs. 6.1 kg) compared with CON by decreasing meal frequency but their… Advisors/Committee Members: Allen, Michael S, Ehrhardt, Richard, Beede, Dave, VandeHaar, Michael, Herdt, Thomas.

Subjects/Keywords: Dairy cattle – Feed utilization efficiency; Puerperium; Dairy cattle – Feeding and feeds; Dairy cattle – Behavior; Animal sciences

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APA (6^th Edition):

Gualdrón-Duarte, L. B. (2017). Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:6662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gualdrón-Duarte, Laura Bibiana. “Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period.” 2017. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:6662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gualdrón-Duarte, Laura Bibiana. “Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period.” 2017. Web. 01 Mar 2021.

Vancouver:

Gualdrón-Duarte LB. Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period. [Internet] [Thesis]. Michigan State University; 2017. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:6662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gualdrón-Duarte LB. Effects of metabolic fuels on feeding behavior and dry matter intake of dairy cows in the postpartum period. [Thesis]. Michigan State University; 2017. Available from: http://etd.lib.msu.edu/islandora/object/etd:6662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

10. Boerman, Jacquelyn Ploetz. Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows.

Degree: 2014, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:2849

►

"The five research chapters presented provide insight on the effects of different dietary factors on fatty acid (FA) digestion and metabolism in lactating dairy cattle."… (more)

Subjects/Keywords: Dairy cattle – Diet therapy; Dairy cattle – Metabolism; Dairy cattle – Physiology; Dairy cattle – Feeding and feeds; Rumination (Digestion); Fatty acids; Milk yield; Animal sciences

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Boerman, J. P. (2014). Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:2849

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Boerman, Jacquelyn Ploetz. “Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows.” 2014. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:2849.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Boerman, Jacquelyn Ploetz. “Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows.” 2014. Web. 01 Mar 2021.

Vancouver:

Boerman JP. Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows. [Internet] [Thesis]. Michigan State University; 2014. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:2849.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Boerman JP. Dietary factors affecting fatty acid digestion and metabolism in lactating dairy cows. [Thesis]. Michigan State University; 2014. Available from: http://etd.lib.msu.edu/islandora/object/etd:2849

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

11. Nieman, Christine. Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system.

Degree: 2012, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:1064

►

Thesis M.S. Michigan State University. Animal Science 2012.

Integration of automatic milking systems (AMS) into Midwestern pasture-based systems has been suggested as an alternative low… (more)

Subjects/Keywords: Milking machines; Dairy cattle – Behavior – Middle West; Dairy cattle – Food; Dairy cattle – Feeding and feeds; Pasture animals – Middle West; Pasture animals; Dairy cattle – Behavior; Animal sciences

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APA (6^th Edition):

Nieman, C. (2012). Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:1064

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nieman, Christine. “Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system.” 2012. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:1064.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nieman, Christine. “Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system.” 2012. Web. 01 Mar 2021.

Vancouver:

Nieman C. Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:1064.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nieman C. Effects of stocking rate and supplementation on pasture utilization, cow performance, and rumen environment in a pasture-based and automatic milking system. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:1064

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Missouri – Columbia

12. Barkley, Nicole Marie. Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow.

Degree: 2013, University of Missouri – Columbia

URL: https://doi.org/10.32469/10355/42632

► Three experiments were conducted to investigate the effects of commercially available feed additives on production variables and metabolic markers when supplemented during the periparturient period.… (more)

Subjects/Keywords: Dairy cows; Effect of commercial feed additives; Dairy cattle – Feeding and feeds; Feed additives; Dairy cattle – Metabolism; Milk yield

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APA (6^th Edition):

Barkley, N. M. (2013). Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow. (Thesis). University of Missouri – Columbia. Retrieved from https://doi.org/10.32469/10355/42632

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Barkley, Nicole Marie. “Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow.” 2013. Thesis, University of Missouri – Columbia. Accessed March 01, 2021. https://doi.org/10.32469/10355/42632.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Barkley, Nicole Marie. “Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow.” 2013. Web. 01 Mar 2021.

Vancouver:

Barkley NM. Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow. [Internet] [Thesis]. University of Missouri – Columbia; 2013. [cited 2021 Mar 01]. Available from: https://doi.org/10.32469/10355/42632.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barkley NM. Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow. [Thesis]. University of Missouri – Columbia; 2013. Available from: https://doi.org/10.32469/10355/42632

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

13. Witaifi, Ali Adil Mutlak. The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems.

Degree: 2014, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:2469

►

Thesis M.S. Michigan State University. Animal Science 2014.

"The aim of this thesis was to examine the impact of stocking rate in the stalls and… (more)

Subjects/Keywords: Dairy cattle – Health; Dairy cattle – Behavior; Animal welfare; Dairy cattle – Feeding and feeds; Dairy farmers – Surveys; Dairy farmers; Animal behavior; Animal sciences

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APA (6^th Edition):

Witaifi, A. A. M. (2014). The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:2469

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Witaifi, Ali Adil Mutlak. “The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems.” 2014. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:2469.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Witaifi, Ali Adil Mutlak. “The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems.” 2014. Web. 01 Mar 2021.

Vancouver:

Witaifi AAM. The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems. [Internet] [Thesis]. Michigan State University; 2014. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:2469.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Witaifi AAM. The impact of stall and feed rail stocking rate on cow welfare and behavior in automatic milking systems. [Thesis]. Michigan State University; 2014. Available from: http://etd.lib.msu.edu/islandora/object/etd:2469

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

14. Carrasquillo-Mangual, Martin Javier. Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations.

Degree: 2017, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:4740

►

Thesis M.S. Michigan State University. Animal Science 2017

"A total of 84 Holstein cows in mid-lactation were studied in three experiments. The study was a… (more)

Subjects/Keywords: Holstein-Friesian cattle – Feed utilization efficiency; Holstein-Friesian cattle – Feeding and feeds; Dairy cattle – Feed utilization efficiency; Dairy cattle – Feeding and feeds; Animal sciences; Agriculture

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APA (6^th Edition):

Carrasquillo-Mangual, M. J. (2017). Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:4740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Carrasquillo-Mangual, Martin Javier. “Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations.” 2017. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:4740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Carrasquillo-Mangual, Martin Javier. “Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations.” 2017. Web. 01 Mar 2021.

Vancouver:

Carrasquillo-Mangual MJ. Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations. [Internet] [Thesis]. Michigan State University; 2017. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:4740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Carrasquillo-Mangual MJ. Repeatability of residual feed intake by lactating dairy cows fed two dietary forage concentrations. [Thesis]. Michigan State University; 2017. Available from: http://etd.lib.msu.edu/islandora/object/etd:4740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Massey University

15. Groenendijk, Mattes. The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer.

Degree: MS, Animal Science, 2019, Massey University

URL: http://hdl.handle.net/10179/15649

► Feeding calves more milk has been shown to increase their pre-weaning growth rate and is associated with improved lifetime performance, but few studies have determined… (more)

▼ Feeding calves more milk has been shown to increase their pre-weaning growth rate and is associated with improved lifetime performance, but few studies have determined the effect of providing greater milk allowance on the feed intake and growth of heifer calves in New Zealand dairy farming systems. The objective of this study was to determine the effect of 3 different milk replacer (MR) allowances when allocated via automated feeding machines on the feed intake, growth, mammary gland development and grazing behaviour of dairy heifers (Holstein- Friesian x Jersey) in a pastoral system. Calves were allocated MR at either a low allowance, fed at 10% of initial body weight (BW) (LA; n = 67), a high allowance, fed at 20% of initial BW (HA; n = 65) or an ad libitum allowance (ADLIB; n = 66). Weaning began after 69 days on the study by gradually reducing MR allowance over 14 days, so that weaning was concluded by 83 days. All calves had free access to pelleted calf starter via automatic feeders until 121 days, and to ryegrass hay from 21 to 91 days. Calves were put outdoors and given access to pasture at 91 days. Calves that were fed more MR had greater total dry matter intake and greater growth rate before weaning (ADLIB > HA > LA; P < 0.01), but ADLIB calves had lower intake of calf-starter and lower growth rate in the first 5-weeks after weaning than HA and LA calves (P < 0.01). At 6 months of age, ADLIB and HA calves were heavier than LA (P < 0.05), but there was no difference in BW at 10 months of age. Pre-weaning growth rate was positively associated with BW at 6 months of age (R2 = 0.37; P < 0.01) but was not related to post- weaning growth rate. Pre-weaning growth of the mammary parenchyma, as measured by ultrasonography, was greater in LA than ADLIB calves (P < 0.05) but there was no difference in the mammary fat pad or total gland growth. A subset of calves (n = 28) had their behaviour monitored on 4 occasions over a 5-week period, beginning a day after being given access to pasture. One day after being given access to pasture, ADLIB calves spent more time grazing than LA calves, and LA calves spent more time ruminating than HA and ADLIB calves (P < 0.05). There was no difference among treatments in grazing behaviour at subsequent observations. This study demonstrates that group-housed crossbred heifer calves have greater pre-weaning growth rates when fed more milk (10% of initial BW vs 20% of initial BW vs ad libitum feeding), and maintain this weight advantage to 6 months, but not to 10 months of age when grazing pasture. The impact of increased pre-weaning growth rate and the effect of differences in pre-weaning mammary gland development on future lactation performance of heifers in a pastoral system require further investigation.

Subjects/Keywords: Heifers; New Zealand; Growth; Development; Dairy cattle; Feeding and feeds

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Groenendijk, M. (2019). The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer. (Masters Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/15649

Chicago Manual of Style (16^th Edition):

Groenendijk, Mattes. “The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer.” 2019. Masters Thesis, Massey University. Accessed March 01, 2021. http://hdl.handle.net/10179/15649.

MLA Handbook (7^th Edition):

Groenendijk, Mattes. “The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer.” 2019. Web. 01 Mar 2021.

Vancouver:

Groenendijk M. The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer. [Internet] [Masters thesis]. Massey University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10179/15649.

Council of Science Editors:

Groenendijk M. The growth and development of dairy heifers fed a low, high and ad libitum allocation of milk replacer. [Masters Thesis]. Massey University; 2019. Available from: http://hdl.handle.net/10179/15649

Oregon State University

16. DeGroot, Michael Alan. Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production.

Degree: PhD, Animal Science, 2004, Oregon State University

URL: http://hdl.handle.net/1957/22408

► Our objectives were to determine if dietary cation-anion difference (DCAD) and source of anions influence periparturient feed intake and milk production, and to characterize feeding… (more)

▼ Our objectives were to determine if dietary cation-anion difference (DCAD) and source of anions influence periparturient feed intake and milk production, and to characterize feeding behavior of dairy cattle during the transition period. Diets differed in DCAD (cationic or anionic) and anionic supplement (BioChlor®, Fermenten®, or anionic salts), and were Control (DCAD +20 meq/100 g DM), BioChlor® (DCAD -12 meq/100 g DM), Fermenten® (DCAD -10 meq/100 g DM), and Salts (DCAD -10 meq/100 g DM). Urine pH was lower for cows that consumed an anionic diet prepartum compared to control. Prepartum diet had no effect on prepartum DMI of multiparous or primiparous cows. Postpartum DMI and milk yield for multiparous cows fed anionic diets prepartum was greater compared to control. Postpartum dry matter intake and milk yield of primiparous cows was similar for prepartum diets. Feeding prepartum anionic diets did not affect plasma Ca at or near calving. Postpartum ß-hydroxybutyrate and nonesterified fatty acids were lower for primiparous cows fed prepartum anionic diets compared to control. Prepartum and postpartum plasma glucose concentrations were not affected by prepartum diet for all cows. Plasma cortisol concentrations were similar between parities during the prepartum and postpartum periods. Liver triglyceride differed for parity by day. Parities were similar at 21 d prepartum, but at 0 d and 21 d postpartum, levels were greater for cows. Feeding behavior was not altered by prepartum anionic diets. Prepartum and postpartum feeding rate was greater for multiparous cows, whereas prepartum daily meal time was greater for primiparous cows. Daily meal time, meal duration, feed intake and feed intake per meal decreased prepartum and increased postpartum. Feeding rate did not change prepartum, but decreased during the postpartum period. Results indicate that decreasing the DCAD of the diet during the prepartum period can increase postpartum DM1 and milk production of multiparous cows without negatively affecting performance of primiparous cows. In addition, depression in feed intake that occurs around the time of parturition coincides with a decrease in daily meal time. Therefore, strategies that increase feeding time during this critical period may be useful in increasing feed intake. Advisors/Committee Members: French, Patrick D. (advisor).

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

DeGroot, M. A. (2004). Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/22408

Chicago Manual of Style (16^th Edition):

DeGroot, Michael Alan. “Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production.” 2004. Doctoral Dissertation, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/22408.

MLA Handbook (7^th Edition):

DeGroot, Michael Alan. “Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production.” 2004. Web. 01 Mar 2021.

Vancouver:

DeGroot MA. Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production. [Internet] [Doctoral dissertation]. Oregon State University; 2004. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/22408.

Council of Science Editors:

DeGroot MA. Effect of prepartum anionic supplementation on periparturient feed intake and behavior, health and milk production. [Doctoral Dissertation]. Oregon State University; 2004. Available from: http://hdl.handle.net/1957/22408

Oregon State University

17. Kyeyune-Sendagi, Aloysius Lloyd. Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture.

Degree: MS, Animal Science, 1968, Oregon State University

URL: http://hdl.handle.net/1957/47049

► Four experiments were conducted (1961-1964) for the primary purpose of studying the milk and milk constituent yields of dairy cows under dry lot and pasture… (more)

▼ Four experiments were conducted (1961-1964) for the primary purpose of studying the milk and milk constituent yields of dairy cows under dry lot and pasture systems of management. The secondary purpose was to compare the health and breeding performance of cows under these two systems. Ninety-eight cows of the Holstein and Jersey breeds were used. These cows were paired on the basis of breed, age, current milk production, previous lactation yields, days in milk, days in gestation and udder health and were assigned randomly to the two experimental groups. Cows in the dry lot groups were fed grass silage and alfalfa hay (periods I-III) or haylage (period IV) whereas, cows in the pasture group were strip-grazing irrigated grass-legume pastures. Both groups were also fed the same concentrate mixture twice daily. Differences in performance between the two systems were not significant statistically (P < 0.05) for the following criteria: (1) age at calving (periods I, III and IV), (2) days in milk prior to experimentation (periods I, II, and IV), (3) projected milk and milk fat records (305 day, 2X) for all periods, (4) age adjusted (M.E.) milk records (periods I, II and IV), (5) age adjusted milk fat records (periods I-IV), (6) complete records (periods I, II and IV), (7) complete lactation protein records (periods II-IV) and (8) differences between complete and incomplete projected milk and milk fat records of all 98 cows, Differences in performance were significant for the above criteria for any of those periods not given in parentheses. Data collected during the four experimental feeding periods (84, 150, 150 and 68 days, respectively) on milk, PLM, protein and milk fat yields, mastitis and reproduction showed no significant differences (P < 0.05) between the two systems except for milk fat yield which favored the pasture group during period III and number of A.I. services for conception which was higher in the dry lot group during period II. Higher levels of concentrate feeding resulted in higher milk and milk constituent yields. The results of these studies indicate that milk cows will perform equally well when subjected to dry lot or irrigated grass-legume pastures under the conditions of these experiments. Advisors/Committee Members: Kliewer, Ray H. (advisor).

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Kyeyune-Sendagi, A. L. (1968). Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/47049

Chicago Manual of Style (16^th Edition):

Kyeyune-Sendagi, Aloysius Lloyd. “Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture.” 1968. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/47049.

MLA Handbook (7^th Edition):

Kyeyune-Sendagi, Aloysius Lloyd. “Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture.” 1968. Web. 01 Mar 2021.

Vancouver:

Kyeyune-Sendagi AL. Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture. [Internet] [Masters thesis]. Oregon State University; 1968. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/47049.

Council of Science Editors:

Kyeyune-Sendagi AL. Performance of dairy cattle under two feeding regimes, dry lot and irrigated pasture. [Masters Thesis]. Oregon State University; 1968. Available from: http://hdl.handle.net/1957/47049

Oregon State University

18. Tanida, Hajime. The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep.

Degree: MS, Animal Science, 1983, Oregon State University

URL: http://hdl.handle.net/1957/41294

► I. The Effect of Artificial Photoperiod on Eating Behavior and Other Behavioral Observations of Dairy Cows. Twenty-eight cows were randomly assigned to a dairy photoperiod… (more)

▼ I. The Effect of Artificial Photoperiod on Eating Behavior and Other Behavioral Observations of Dairy Cows. Twenty-eight cows were randomly assigned to a dairy photoperiod of 18 h light and 6 h darkness or to continuous light and observed 1 d each month from December 1981 to February 19.82. Lighting regimen did not affect eating behavior or milk production. Overall means of total eating time, number of eating bouts and average time eating per bout on the three observation days were 270 to 280 min, 10 to 12 times and 24 to 27 min, respectively. Eating behavior and milk production were not significantly correlated. Eating patterns were similar in both groups and across observation days. Peaks of eating activity occurred before sunset, bracketing the evening milking and after the offering of fresh feed in the morning. Approximately 80% of total eating activity occurred between 0900 and 2100 h in both groups. Cows had a clear preference for entry into the right or left side of the milking parlor, and entry order was repeatable. Milking order and milk production were not correlated. In one group, location of free stalls did not influence utilization; but in the other group, centrally located stalls were utilized more than stalls at either end of the alley. About 40% of cows had individual free stall preferences. II. The Effect of Recorded Sound on Feeding Behavior of Lambs. This study was designed to examine the effect of recorded sound on the feeding behavior and feed intake of lambs and to examine their feeding patterns throughout the day. Thirty crossbred lambs were randomly assigned to 6 pens. The trial lasted 44 d (July 30 to September 11, 1982) and consisted of 4 d acclimation to test facilities, then 4 d with no sound stimulation followed by 4 d with sound stimulation, This cycle of 4 d without sound followed by 4 d with sound stimulation was repeated for the remainder of the trial . Sound stimulation consisted of 6 min broadcasts, every 3 h, of sounds associated with feed delivery and eating. Lambs were observed continuously for 24 h on 6 observation days, 3 when lambs were subjected to sound stimulation and 3 when they were not. The sound stimulation affected neither feed intake nor feeding behavior. Lambs largely ignored the recorded sounds, and total feed intakes during 20 sound-stimulated vs 20 non-sound-stimulated days were 1234 kg vs 1240 kg, respectively. There was a rhythmic feeding pattern at 1 to 2 h intervals, synchronously throughout the barn, and this was not affected by the 3 h cycle of sound stimulation. There were no major peaks in feeding activity except after the offering of fresh feed in the morning. Feeding activity did not change with sunrise or sunset and peaks of eating activity were evenly distributed throughout the 24 h. The overall means per lamb for the total time spent eating, the number of eating bouts, the average time eating per bout and the number of drinking episodes across the 6 observation d were 118.8 min, 22.6 times, 5.5 min, and 9.5… Advisors/Committee Members: Hohenboken, William D. (advisor), Moore, Frank (committee member).

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Tanida, H. (1983). The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/41294

Chicago Manual of Style (16^th Edition):

Tanida, Hajime. “The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep.” 1983. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/41294.

MLA Handbook (7^th Edition):

Tanida, Hajime. “The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep.” 1983. Web. 01 Mar 2021.

Vancouver:

Tanida H. The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep. [Internet] [Masters thesis]. Oregon State University; 1983. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/41294.

Council of Science Editors:

Tanida H. The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep. [Masters Thesis]. Oregon State University; 1983. Available from: http://hdl.handle.net/1957/41294

Oregon State University

19. Pangborn, Marvin Clark. The effects of various levels of dietary protein on high producing dairy cows in early lactation.

Degree: MS, Animal Science, 1977, Oregon State University

URL: http://hdl.handle.net/1957/43108

► This project was designed to test the biological effects of three levels of dietary protein (12.7, 16.3 and 19.3% CP on a dry matter basis)… (more)

▼ This project was designed to test the biological effects of three levels of dietary protein (12.7, 16.3 and 19.3% CP on a dry matter basis) on high producing Holstein-Friesian dairy cows. Forty five second lactation or older cows that showed the potential to produce over 31.75 kg (70 lbs) per day were selected. Cows were randomly assigned to treatments on day four postpartum and remained on the trial for 90 days. A complete isocaloric ration was fed, consisting of corn or grass silage, alfalfa hay and a grain concentrate. Four percent fat-corrected milk production did not differ significantly between groups averaging 29.4, 31.3 and 32.0 kg/cow/day for the 12.7, 16.3 and 19.3% CP rations, respectively. Actual milk production was significantly higher in the 16.3% CP group than the 12.7% CP group. Group averages were 30.94, 35.52 and 34.79 kg/cow/day for the 12.7, 16.3 and 19.3% CP rations, respectively. Milk fat concentration averaged 3.66, 3.21 and 3.46% for the 12.7, 16.3 and 19.3% CP rations, respectively. The average for 16.3% CP ration cows was significantly different from the averages of the 12.7 and 19.3% CP ration cows. Milk fat concentration for all cows was 3.7% for period one (1-30 days), 3.21% for period two (31-60 days) and 3.46% for period three (61-90 days). Milk fat % was greater (P < .01) for period one. Milk protein was not significantly affected by level of dietary protein. Significant differences were found between period one relative to periods two and three. The period averages were 3.76, 3.36 and 3.46 for period one, two and three, respectively. Persistancy of lactation was significantly different between periods, averaging 106.5% in the first period, 100.2% in the'second period and 98.4% in the third period. Persistancy was not affected by treatment. Feed intake differed significantly due to treatment averaging 17.7, 18.18 and 18.67 kg/cow/day for the 12.7, 16.3 and 19.3% CP rations, respectively. There were no significant differences between periods. Bodyweight changes were not significant between the three treatments, although they were (P < .01) between periods. During the first period all cows averaged a 24 kg weight loss; however, cows gained 3.8 kg in the second period and 13.5 kg in the third period. Rumen fluid ammonia increased with each level of protein (4.29, 7.66 and 19.3 mg% for the 12.7, 16.3 and 19.3% CP rations, respectively), but was only significant between the 19.3% CP ration relative to the 16.3 and 12.7% CP rations. Rumen fluid pH did not differ between treatment means. Blood samples were analyzed for several factors. Plasma urea nitrogen (PUN) measured at six weeks postpartum, averaged 7.89, 10.27 and 18.25 mg% for the 12.7, 16.3 and 19.3% CP rations, respectively. Plasma albumin showed the same trend, being significantly higher in cows on the 19.3% CP ration. Average values were 3.45 mg% for the 12.7% CP level, 3.47 mg% for the 16.3% CP level and 3.85 mg% for the 19.3% CP ration. Blood ammonia levels, determined in 30 cows at… Advisors/Committee Members: Adams, H. P. (advisor), Oldfield, James E. (committee member).

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Pangborn, M. C. (1977). The effects of various levels of dietary protein on high producing dairy cows in early lactation. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/43108

Chicago Manual of Style (16^th Edition):

Pangborn, Marvin Clark. “The effects of various levels of dietary protein on high producing dairy cows in early lactation.” 1977. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/43108.

MLA Handbook (7^th Edition):

Pangborn, Marvin Clark. “The effects of various levels of dietary protein on high producing dairy cows in early lactation.” 1977. Web. 01 Mar 2021.

Vancouver:

Pangborn MC. The effects of various levels of dietary protein on high producing dairy cows in early lactation. [Internet] [Masters thesis]. Oregon State University; 1977. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/43108.

Council of Science Editors:

Pangborn MC. The effects of various levels of dietary protein on high producing dairy cows in early lactation. [Masters Thesis]. Oregon State University; 1977. Available from: http://hdl.handle.net/1957/43108

Oregon State University

20. Eapen, Kochukaleekal John. The influence of dietary carotene levels on semen phosphatases in farm animals.

Degree: PhD, Animal Husbandry, 1958, Oregon State University

URL: http://hdl.handle.net/1957/49346

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Eapen, K. J. (1958). The influence of dietary carotene levels on semen phosphatases in farm animals. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/49346

Chicago Manual of Style (16^th Edition):

Eapen, Kochukaleekal John. “The influence of dietary carotene levels on semen phosphatases in farm animals.” 1958. Doctoral Dissertation, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/49346.

MLA Handbook (7^th Edition):

Eapen, Kochukaleekal John. “The influence of dietary carotene levels on semen phosphatases in farm animals.” 1958. Web. 01 Mar 2021.

Vancouver:

Eapen KJ. The influence of dietary carotene levels on semen phosphatases in farm animals. [Internet] [Doctoral dissertation]. Oregon State University; 1958. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/49346.

Council of Science Editors:

Eapen KJ. The influence of dietary carotene levels on semen phosphatases in farm animals. [Doctoral Dissertation]. Oregon State University; 1958. Available from: http://hdl.handle.net/1957/49346

Oregon State University

21. Bennett, William Riley. Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot.

Degree: MS, Dairy and Animal Husbandry, 1962, Oregon State University

URL: http://hdl.handle.net/1957/49470

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Bennett, W. R. (1962). Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/49470

Chicago Manual of Style (16^th Edition):

Bennett, William Riley. “Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot.” 1962. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/49470.

MLA Handbook (7^th Edition):

Bennett, William Riley. “Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot.” 1962. Web. 01 Mar 2021.

Vancouver:

Bennett WR. Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot. [Internet] [Masters thesis]. Oregon State University; 1962. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/49470.

Council of Science Editors:

Bennett WR. Comparative milk yields, milk composition and herd health of dairy cows on irrigated pasture and in dry-lot. [Masters Thesis]. Oregon State University; 1962. Available from: http://hdl.handle.net/1957/49470

Oregon State University

22. Meyers, George Henry. Comparative values of corn and corn cannery waste silages for milk production in dairy cattle.

Degree: MS, Animal Science, 1972, Oregon State University

URL: http://hdl.handle.net/1957/45624

► The production level of dairy cows fed corn cannery waste silage was investigated during a 305 day lactation study. Eighteen Holstein cows were paired according… (more)

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Meyers, G. H. (1972). Comparative values of corn and corn cannery waste silages for milk production in dairy cattle. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/45624

Chicago Manual of Style (16^th Edition):

Meyers, George Henry. “Comparative values of corn and corn cannery waste silages for milk production in dairy cattle.” 1972. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/45624.

MLA Handbook (7^th Edition):

Meyers, George Henry. “Comparative values of corn and corn cannery waste silages for milk production in dairy cattle.” 1972. Web. 01 Mar 2021.

Vancouver:

Meyers GH. Comparative values of corn and corn cannery waste silages for milk production in dairy cattle. [Internet] [Masters thesis]. Oregon State University; 1972. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/45624.

Council of Science Editors:

Meyers GH. Comparative values of corn and corn cannery waste silages for milk production in dairy cattle. [Masters Thesis]. Oregon State University; 1972. Available from: http://hdl.handle.net/1957/45624

Oregon State University

23. Buyserie, A. C. (Annette C.). Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition.

Degree: MS, Animal Science, 2004, Oregon State University

URL: http://hdl.handle.net/1957/22774

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Buyserie, A. C. (. C. ). (2004). Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/22774

Chicago Manual of Style (16^th Edition):

Buyserie, A C (Annette C ). “Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition.” 2004. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/22774.

MLA Handbook (7^th Edition):

Buyserie, A C (Annette C ). “Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition.” 2004. Web. 01 Mar 2021.

Vancouver:

Buyserie AC(C). Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition. [Internet] [Masters thesis]. Oregon State University; 2004. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/22774.

Council of Science Editors:

Buyserie AC(C). Perennial ryegrass nonstructural carbohydrates in dairy cattle nutrition. [Masters Thesis]. Oregon State University; 2004. Available from: http://hdl.handle.net/1957/22774

Oregon State University

24. Sanchez, Jorge Ml. Canola meal as a protein supplement in dairy rations.

Degree: MS, Animal Science, 1981, Oregon State University

URL: http://hdl.handle.net/1957/42176

► A four months continuous feeding trial was conducted to evaluate Canola meal as a single protein supplement in complete dairy rations. Thirty high producing Holstein… (more)

▼ A four months continuous feeding trial was conducted to evaluate Canola meal as a single protein supplement in complete dairy rations. Thirty high producing Holstein cows in the second week of lactation were randomly alloted in groups of ten to one of three isonitrogenous (15% CP) and isocaloric (1.6 Mcal/kg of NE lactation) rations, containing either Canola meal (38% CP), Soybean meal (46% CP) or Cottonseed meal (41% CP). Productive and physiological parameters were analysed. Milk production, both actual and 4% FCM, did not differ (P>.05) among diets. However, Canola meal fed cows tended to produce more milk than animals in other treatments. No differences (P>.05) were found for milk protein, fat, total solids nor solids not fat percentages. Milk solids not fat yield was the only milk component produced in different (P=.024) amounts between diets and was mainly influenced by milk production. Canola meal glucosinolates, tannins and phytate did not impair feed intake, however animals in this group showed lower feed conversion. Rumen total volatile fatty acid content was higher (P=.031) for Canola meal and Soybean meal groups. No significant differences (P>.05) were found for rumen volatile fatty acid composition, acetic:propionic ratio, ammonia nitrogen or pH. Urea nitrogen, total protein and albumin plasma concentrations were not different (P>.05) among diets, suggesting that Canola, Soybean and Cottonseed meals were equal as protein supplements. White blood cells was the only hematological parameter (packed cell volume, red blood cells, white blood cells and hemoglobin were analysed) that significantly differed (P=.011) among diets. Soybean meal fed cows showed higher white blood cell count, which is believed to have a physiological origin. Triiodothyronine uptake values were significantly higher (P=.015) in Soybean meal fed cows. However, Triiodothyronine uptake as well as Tetraiodothyronine concentration and Free Thyroxine Index correspond to euthyroid values, indicating that Canola meal glucosinolates did not affect the thyroid metabolism of the experimental animals. Results indicate that Canola meal may be used as a single protein supplement in rations for high producing cows, to satisfactorily replace traditional sources of protein such as Soybean meal and Cottonseed meal. Advisors/Committee Members: Claypool, Donald (advisor).

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA (6^th Edition):

Sanchez, J. M. (1981). Canola meal as a protein supplement in dairy rations. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/42176

Chicago Manual of Style (16^th Edition):

Sanchez, Jorge Ml. “Canola meal as a protein supplement in dairy rations.” 1981. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/42176.

MLA Handbook (7^th Edition):

Sanchez, Jorge Ml. “Canola meal as a protein supplement in dairy rations.” 1981. Web. 01 Mar 2021.

Vancouver:

Sanchez JM. Canola meal as a protein supplement in dairy rations. [Internet] [Masters thesis]. Oregon State University; 1981. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/42176.

Council of Science Editors:

Sanchez JM. Canola meal as a protein supplement in dairy rations. [Masters Thesis]. Oregon State University; 1981. Available from: http://hdl.handle.net/1957/42176

Oregon State University

25. Sprowls, Roger Garrett. Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows.

Degree: MS, Dairy Husbandry, 1956, Oregon State University

URL: http://hdl.handle.net/1957/51145

Subjects/Keywords: Dairy cattle – Feeding and feeds

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sprowls, R. G. (1956). Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/51145

Chicago Manual of Style (16^th Edition):

Sprowls, Roger Garrett. “Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows.” 1956. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/51145.

MLA Handbook (7^th Edition):

Sprowls, Roger Garrett. “Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows.” 1956. Web. 01 Mar 2021.

Vancouver:

Sprowls RG. Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows. [Internet] [Masters thesis]. Oregon State University; 1956. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/51145.

Council of Science Editors:

Sprowls RG. Some effects of various levels and ratios of calcium and phosphorus in the rations of dairy cows. [Masters Thesis]. Oregon State University; 1956. Available from: http://hdl.handle.net/1957/51145

Michigan State University

26. Stocks, Sarah (Sarah Elizabeth). Propionate control of feed intake : interaction with lipolytic state.

Degree: 2013, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:548

►

Thesis Ph. D. Michigan State University. Animal Science 2013.

The concept that feed intake is controlled by hepatic oxidation of fuels has developed over the… (more)

▼

Thesis Ph. D. Michigan State University. Animal Science 2013.

The concept that feed intake is controlled by hepatic oxidation of fuels has developed over the last several decades, mostly with laboratory species. Propionate has been implicated in the control of feed intake in ruminants, and the mechanism is consistent with simulation of hepatic oxidation. Previous research in our laboratory has demonstrated that intraruminal propionate infusion, compared with iso-osmotic acetate infusion, is more hypophagic in early lactation than in mid-lactation dairy cows. Three experiments were conducted to investigate the mechanisms related to the control of feed intake in early lactation dairy cows. The first experiment was a randomized block design with 30 lactating Holstein cows from 3 - 40 days in milk (DIM) to evaluate the extent of hypophagia from intraruminal propionate infusion for cows in early lactation. Intraruminal propionate infusion, compared with iso-osmotic acetate infusion, depressed dry matter intake (DMI) 20%. There was an interaction between treatment and DMI such that propionate was increasingly hypophagic for cows with greater hepatic acetyl CoA concentration. The second experiment evaluated longer-term infusions over 3 d to identify adaptive mechanisms using 12 lactating Holstein cows from 2 - 13 DIM in a cross-over design experiment. Propionate infusion decreased DMI over the 3-d infusion period, however a treatment by period interaction was detected. During period 1, propionate infusion, compared to acetate infusion, decreased DMI by 18% by decreasing meal size by 21%. Similar to the results of the first experiment, propionate was more hypophagic than acetate for cows with greater hepatic acetyl CoA concentration. However, there was no treatment by day interaction for DMI suggesting that cows did not adapt to intraruminal propionate over the 3 d infusion period. The third experiment was designed to evaluate the effects of intravenous lipid infusion on feed intake response to intraruminal propionic acid infusion by lactating cows. Eight lactating Holstein cows past-peak lactation were used in a replicated 4x4 Latin square experiment with a 2x2 factorial arrangement of treatments. Lipid infusion, compared to a saline control, did not affect plasma non-esterified fatty acid (NEFA) and β-hydroxybutyrate (BHBA) concentrations, but did increase hepatic acetyl CoA concentration. Intraruminal propionate infusion, compared to a sham control, decreased DMI 15%, but lipid did not affect DMI. There was no interaction between lipid and propionate for DMI, likely because lipid infusion failed to mimic the metabolite concentrations of cows in a lipolytic state. Collectively, these experiments provide strong evidence that propionate is more hypophagic for cows in a lipolytic state. Additional research is needed to evaluate the longer-term effects of propionate and its application to diet formulation for cows in the postpartum period.

Description based on online resource; title from PDF t.p. (ProQuest,…

Advisors/Committee Members: Allen, Michael S, Lock, Adam, Herdt, Thomas, Romsos, Dale, Ehrhardt, Richard.

Subjects/Keywords: Dairy cattle – Feeding and feeds; Propionates; Lipolysis; Animal sciences

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APA (6^th Edition):

Stocks, S. (. E. (2013). Propionate control of feed intake : interaction with lipolytic state. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:548

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stocks, Sarah (Sarah Elizabeth). “Propionate control of feed intake : interaction with lipolytic state.” 2013. Thesis, Michigan State University. Accessed March 01, 2021. http://etd.lib.msu.edu/islandora/object/etd:548.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stocks, Sarah (Sarah Elizabeth). “Propionate control of feed intake : interaction with lipolytic state.” 2013. Web. 01 Mar 2021.

Vancouver:

Stocks S(E. Propionate control of feed intake : interaction with lipolytic state. [Internet] [Thesis]. Michigan State University; 2013. [cited 2021 Mar 01]. Available from: http://etd.lib.msu.edu/islandora/object/etd:548.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stocks S(E. Propionate control of feed intake : interaction with lipolytic state. [Thesis]. Michigan State University; 2013. Available from: http://etd.lib.msu.edu/islandora/object/etd:548

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arizona

27. Khalaf, Sadi Shalan. THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS.

Degree: 1985, University of Arizona

URL: http://hdl.handle.net/10150/275261

Subjects/Keywords: Dairy cattle – Feeding and feeds.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Khalaf, S. S. (1985). THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/275261

Chicago Manual of Style (16^th Edition):

Khalaf, Sadi Shalan. “THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS. ” 1985. Masters Thesis, University of Arizona. Accessed March 01, 2021. http://hdl.handle.net/10150/275261.

MLA Handbook (7^th Edition):

Khalaf, Sadi Shalan. “THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS. ” 1985. Web. 01 Mar 2021.

Vancouver:

Khalaf SS. THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS. [Internet] [Masters thesis]. University of Arizona; 1985. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10150/275261.

Council of Science Editors:

Khalaf SS. THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS. [Masters Thesis]. University of Arizona; 1985. Available from: http://hdl.handle.net/10150/275261

University of Aberdeen

28. Issak, Ibrahim Haji. Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya.

Degree: School of Biological Sciences., 2008, University of Aberdeen

URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25503 ; http://digitool.abdn.ac.uk:1801/webclient/DeliveryManager?pid=25503&custom_att_2=simple_viewer

Subjects/Keywords: Dairy cattle - Feeding and feeds

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Issak, I. H. (2008). Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25503 ; http://digitool.abdn.ac.uk:1801/webclient/DeliveryManager?pid=25503&custom_att_2=simple_viewer

Chicago Manual of Style (16^th Edition):

Issak, Ibrahim Haji. “Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya.” 2008. Doctoral Dissertation, University of Aberdeen. Accessed March 01, 2021. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25503 ; http://digitool.abdn.ac.uk:1801/webclient/DeliveryManager?pid=25503&custom_att_2=simple_viewer.

MLA Handbook (7^th Edition):

Issak, Ibrahim Haji. “Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya.” 2008. Web. 01 Mar 2021.

Vancouver:

Issak IH. Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya. [Internet] [Doctoral dissertation]. University of Aberdeen; 2008. [cited 2021 Mar 01]. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25503 ; http://digitool.abdn.ac.uk:1801/webclient/DeliveryManager?pid=25503&custom_att_2=simple_viewer.

Council of Science Editors:

Issak IH. Evaluation of dairy cattle rearing practices and feeding management strategies in selected commercial dairy farms in Nakuru district, Kenya. [Doctoral Dissertation]. University of Aberdeen; 2008. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25503 ; http://digitool.abdn.ac.uk:1801/webclient/DeliveryManager?pid=25503&custom_att_2=simple_viewer

University of Arizona

29. Dafaala, Fadul El Sheikh Omar, 1935-. The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows .

Degree: 1963, University of Arizona

URL: http://hdl.handle.net/10150/319430

Subjects/Keywords: Dairy cattle – Feeding and feeds.

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dafaala, Fadul El Sheikh Omar, 1. (1963). The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/319430

Chicago Manual of Style (16^th Edition):

Dafaala, Fadul El Sheikh Omar, 1935-. “The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows .” 1963. Masters Thesis, University of Arizona. Accessed March 01, 2021. http://hdl.handle.net/10150/319430.

MLA Handbook (7^th Edition):

Dafaala, Fadul El Sheikh Omar, 1935-. “The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows .” 1963. Web. 01 Mar 2021.

Vancouver:

Dafaala, Fadul El Sheikh Omar 1. The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows . [Internet] [Masters thesis]. University of Arizona; 1963. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10150/319430.

Council of Science Editors:

Dafaala, Fadul El Sheikh Omar 1. The nutritive value and palatability of milo as compared to barley when fed to lactating dairy cows . [Masters Thesis]. University of Arizona; 1963. Available from: http://hdl.handle.net/10150/319430

University of Arizona

30. García-Vargas, Lorenzo, 1942-. Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers .

Degree: 1966, University of Arizona

URL: http://hdl.handle.net/10150/347579

Subjects/Keywords: Dairy cattle – Feeding and feeds.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

García-Vargas, Lorenzo, 1. (1966). Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/347579

Chicago Manual of Style (16^th Edition):

García-Vargas, Lorenzo, 1942-. “Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers .” 1966. Masters Thesis, University of Arizona. Accessed March 01, 2021. http://hdl.handle.net/10150/347579.

MLA Handbook (7^th Edition):

García-Vargas, Lorenzo, 1942-. “Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers .” 1966. Web. 01 Mar 2021.

Vancouver:

García-Vargas, Lorenzo 1. Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers . [Internet] [Masters thesis]. University of Arizona; 1966. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10150/347579.

Council of Science Editors:

García-Vargas, Lorenzo 1. Effect of energy levels on body weight gains, skeletal growth, feed efficiency and reproductive performance of dairy heifers . [Masters Thesis]. University of Arizona; 1966. Available from: http://hdl.handle.net/10150/347579

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Open Access Theses and Dissertations