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You searched for +publisher:"Texas Tech University" +contributor:("Sarturi, Jhones O"). Showing records 1 – 3 of 3 total matches.

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Texas Tech University

1. -9150-2441. The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization.

Degree: MS, Animal Science, 2016, Texas Tech University

The use of alternative feeding strategies such as yeast as a feed additive and cotton burrs as a roughage source to improve feedlot beef cattle growth performance and nutrient utilization were evaluated in two experiments. The first experiment evaluated the effects of live yeast fed to natural program beef steers and its effect on growth performance, apparent total tract nutrient digestibility, carcass characteristics, and feeding behavior. In experiment 1, steers (n = 144; 341 ± 52 kg) were assigned to 1 of 3 treatments, Control (CTL), Low Yeast (LY), and High Yeast (HY) in a completely randomized block design (12 pens/treatment). Data were analyzed using the GLIMMIX procedure of SAS, with pen as experimental unit. Gain efficiency tended to be quadratically improved (P = 0.08) between d0 and 183 with LY diet being 4.3% greater than other treatments. The number of premium choice carcasses increased linearly (P < 0.01) with increasing yeast levels at 33.3%, 68.8% and 70%, respectively. There was a tendency (P = 0.09) for choice carcasses to be decreased linearly with increasing yeast level. A quadratic response was observed for nutrient digestibility, in which steers fed LY had improved digestibility (P < 0.01) of dry matter by 5.4%, organic matter by 4.8%, neutral detergent fiber by 15.2%, acid detergent fiber by 20.2%, crude protein by 6.2%, and ether extract by 2.5% compared to HY and CTL treatments. Moderate inclusion of live yeast improved efficiency of nutrient utilization of steers fed steam-flaked corn-based finishing diets, which tended to positively affect growth performance. The second study evaluated the effect of cotton burrs as a roughage source during the transition of beef cattle (hay to finisher diet) on intake, ruminal characteristics, apparent total tract nutrient digestibility, and feeding behavior. Ruminally cannulated steers (n = 6; BW = 235 ± 81 kg) were assigned using a complete randomized design to 1 of 2 adaptation strategies: alfalfa hay or cotton burrs-based. Steers were fed ad libitum once daily, a series of six diets (7-d period each): wheat hay; 4 step-ups; and a finisher. Ruminal fiber degradability, pH, VFA and NH3, and apparent total tract nutrient digestibility were measured. Data were analyzed using GLIMMIX procedure of SAS (wheat hay period used as covariate). Intake was not affected by adaptation strategies (P ≥ 0.16), except for a tendency (P = 0.10) for alfalfa-strategy steers to ruminate more per kg of NDF consumed during finisher diet. Steers fed cotton burrs-strategy had a lower ruminal pH average on step-3 and finisher periods (5.62 and 5.51 vs. 6.04 and 5.83; P < 0.01 and P = 0.05, respectively). A greater area of pH below 5.6 (200 vs. 15 min*pH; P < 0.01); lower ruminal NH3 concentration (5.1 vs. 8.8 mg/L; P < 0.01); and lower digestibility (OM, ADF, and hemicellulose; P = 0.02) during step-3 were also observed for steers fed cotton burrs-strategy versus alfalfa hay strategy, respectively. However, cotton burrs-strategy steers showed greater (P < 0.01) NDF digestibility… Advisors/Committee Members: Sarturi, Jhones O (advisor), Ballou, Michael A (committee member), Trojan, Sara J (committee member).

Subjects/Keywords: Key words: adaptation; alternative feed; beef cattle; cotton burrs; yeast

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APA (6th Edition):

-9150-2441. (2016). The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/82242

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Author name may be incomplete

Chicago Manual of Style (16th Edition):

-9150-2441. “The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization.” 2016. Masters Thesis, Texas Tech University. Accessed May 08, 2021. http://hdl.handle.net/2346/82242.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7th Edition):

-9150-2441. “The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization.” 2016. Web. 08 May 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-9150-2441. The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization. [Internet] [Masters thesis]. Texas Tech University; 2016. [cited 2021 May 08]. Available from: http://hdl.handle.net/2346/82242.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-9150-2441. The use of alternative feeding strategies to improve feedlot beef cattle growth performance and nutrient utilization. [Masters Thesis]. Texas Tech University; 2016. Available from: http://hdl.handle.net/2346/82242

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete


Texas Tech University

2. -1534-0270. The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization.

Degree: MS, Animal Science, 2016, Texas Tech University

The effects of silage type (corn vs. sorghum) in beef cattle finishing diets and backgrounding system on growth performance, carcass characteristics, nutrient digestibility, ruminal kinetics, and feeding behavior were evaluated. In study 1, steers (n = 128; BW = 394 ± 21 kg) were fed corn (BH8895) or sorghum (AF7401) silage (20 %, DM basis), backgrounded by either grazing (forage sorghum) or bunk fed (65 % concentrate diet) in a completely randomized block design. In study 2, a 4 × 6 unbalanced Latin square design with six steers (BW = 363 ± 23 kg) and four diets (corn or sorghum silage, either at 10 or 20% inclusion, DM basis) was used. In study 3, intact sorghum grain was manually separated from sorghum silage (AF7401) from 10 experimental silos (18.9-L units from 2 sites). Intact grains were ruminally incubated (3 steers; BW = 544 ± 36 kg) using in situ technique, following a complete randomized design. Regardless of backgrounding system, steers fed corn silage diet had lower (P < 0.01) intake (7%), greater (P < 0.01) efficiency (10%), greater (P < 0.01) DM and fiber digestibility (10%), and lower (P < 0.01) acetate:propionate ratio compared with steers fed diets containing sorghum silage. Moreover, steers fed diets with 20% corn silage had 15% greater (P < 0.01) total VFA molar proportion compared with the average of other treatments. Independent of silage type, steers that grazed forage sorghum before feedlot entry had greater (P < 0.01) gain (25%), intake (23%), and efficiency (5%) during finishing phase, compared with bunk backgrounded steers; backgrounding system did not affect (P ≥ 0.25) digestibility of nutrients. Chewing activity increased (P = 0.02) for steers fed 20% silage inclusion, compared to those fed 10% silage; and tended (P = 0.07) to be greater for steers fed sorghum silage than those fed corn silage. Corn silage DM and fiber were more extensively degraded in the rumen (P < 0.01) compared with sorghum silage. After 96 h inside the rumen, ensiled grain degradability of DM reached only 51.7%, showing that material presents potential for improvement on starch availability. Replacing corn silage with sorghum silage in beef finishing diets (low roughage inclusion) requires adjustments to balance dietary energy. Sorghum material induced desirable roughage effect in feeding behavior, but also offered potential to be improved regarding fiber digestibility and intact grain ruminal degradability. Sorghum grazing backgrounded steers positively affected finishing phase, but such strategies must be further evaluated considering economical aspects and water use. Advisors/Committee Members: Sarturi, Jhones O (advisor), Ballou, Michael A (committee member), Trojan, Sara J (committee member).

Subjects/Keywords: sorghum; silage; growth

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APA (6th Edition):

-1534-0270. (2016). The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization. (Masters Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/82243

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16th Edition):

-1534-0270. “The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization.” 2016. Masters Thesis, Texas Tech University. Accessed May 08, 2021. http://hdl.handle.net/2346/82243.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7th Edition):

-1534-0270. “The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization.” 2016. Web. 08 May 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-1534-0270. The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization. [Internet] [Masters thesis]. Texas Tech University; 2016. [cited 2021 May 08]. Available from: http://hdl.handle.net/2346/82243.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-1534-0270. The use of bmr-6 sorghum as forage source in beef cattle growing and feedlot systems on growth performance and nutrient utilization. [Masters Thesis]. Texas Tech University; 2016. Available from: http://hdl.handle.net/2346/82243

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

3. Thompson, Alex. IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE.

Degree: PhD, Animal Science, 2017, Texas Tech University

One hundred ninety-two steers (BW = 354 ± 23.5 kg) were used in a randomized block design to evaluate the effects of ionophore and ractopamine hydrochloride (RH) supplementation strategies on performance and carcass characteristics. Twelve pens of 4 steers were assigned to each of the following treatments: unsupplemented control (CON), laidlomycin propionate (12.1 mg/kg DM) with or without RH (LPRH and LP, respectively), and monensin sodium (36.4 mg/kg DM) with RH (MSRH). Steers were fed for 151 d, of which, respective treatments received RH (Actogain; Zoetis, Florham Park, NJ) at a rate of 300 mg/(head • d) for the final 32 d. Laidlomycin was removed from the LPRH treatment during this period, as no combination feeding has been approved. Upon harvest, carcass data was collected by trained personnel, and subsequent analysis of the LM was conducted in order to estimate tenderness using Warner-Bratzler shear force (WBSF). Prior to RH supplementation, both LP and LPRH had greater ADG (P ≤ 0.02) and G:F (P < 0.01) than CON, while MSRH was intermediate. During the final 32 d, MSRH improved G:F (P ≤ 0.02) compared to all other treatments and tended to increase ADG over unsupplemented controls (P = 0.05). Cattle receiving LP without RH had significantly greater BW at d 151 than CON (P = 0.02), while both RH treatments tended to improve final BW (P ≤ 0.09). Ionophores improved ADG (P ≤ 0.03) and G:F (P < 0.01) for the entire feeding period, and although LP supplemented cattle had greater DMI for the final 32 d than both RH treatments (P ≤ 0.01), intakes for the 151 d trial were similar among treatments. Carcass weights were greater (P = 0.04) in cattle fed LP with no RH than CON, where cattle yielded an average of 12 kg more HCW. Ractopamine increased LM area in MSRH supplemented cattle (P = 0.03) and tended to increase LM area for steers receiving LPRH (P = 0.07). Longissimus steaks of MSRH supplemented cattle had greater WBSF values than CON (P = 0.04) after 7 d of postmortem aging, and greater WBSF values than LPRH steaks after 28 d (P = 0.03). All other carcass and WBSF measurements were similar among treatments. The results of this study indicate that LP supplementation without RH may yield similar performance and carcass responses associated with the administration of a beta-agonist. These results also suggest that performance and carcass characteristics for cattle fed LP are similar to those of cattle fed monensin throughout the feeding period. Advisors/Committee Members: Johnson, Bradley J (advisor), Rathmann, Ryan J (committee member), Sarturi, Jhones O (committee member), Corbin, Marilyn J (committee member), Stevens, Richard D (committee member).

Subjects/Keywords: beef cattle; beta-agonist; ionophore; laidlomycin propionate; monensin sodium

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

APA (6th Edition):

Thompson, A. (2017). IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE. (Doctoral Dissertation). Texas Tech University. Retrieved from http://hdl.handle.net/2346/82053

Chicago Manual of Style (16th Edition):

Thompson, Alex. “IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE.” 2017. Doctoral Dissertation, Texas Tech University. Accessed May 08, 2021. http://hdl.handle.net/2346/82053.

MLA Handbook (7th Edition):

Thompson, Alex. “IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE.” 2017. Web. 08 May 2021.

Vancouver:

Thompson A. IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE. [Internet] [Doctoral dissertation]. Texas Tech University; 2017. [cited 2021 May 08]. Available from: http://hdl.handle.net/2346/82053.

Council of Science Editors:

Thompson A. IONOPHORE AND ANTIMICROBIAL STRATEGIES ALTER LIVE PERFORMANCE, CARCASS CHARACTERISTICS, AND IN VITRO RUMEN FERMENTATION PARAMETERS IN BEEF CATTLE. [Doctoral Dissertation]. Texas Tech University; 2017. Available from: http://hdl.handle.net/2346/82053

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