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Universitat Autònoma de Barcelona

1. Sol Llop, Cinta. Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde.

Degree: Departament de Ciència Animal i dels Aliments, 2016, Universitat Autònoma de Barcelona

The liquid feed (LF) has been used in swine production for several decades obtaining satisfactory production results compared with dry feed. One of the factors that affect those results is the dilution ratio of the mixture. Moreover, the maximum economic benefit of the LF systems is obtained when cheaper by-products are introduced into the diet. Effective utilization of by-products is hampered by its high variability, logistical supply difficulties, scarce nutritional knowledge and practical conditions of use in swine nutrition. In this context, the main objective of this PhD Thesis has been to contribute to optimize the performance of LF system installed in a commercial farm and study the nutritional value of near to the farm by-products for use in liquid feeding fattening pigs. To this purpose, four studies were conducted. In the first study (Chapter 4) several agro-industrial by-products were identified and those most promising were selected. Among selected products, mayonnaise and almond meal were introduced into the LF diets at low levels of inclusion (7.75% and 10%, respectively) and growth performance of pigs and economic benefits of feed costs were assessed. It was observed that the introduction of mayonnaise reduced feed costs by 15% and by 10% for almond meal, without significantly impairing performance results. In order to assess in more detail the nutritional value of some by-products selected in Chapter 4, there were carried out in vivo digestibility trials to evaluate the energy content and the maximum level of inclusion (in some cases) of all by-products (Chapter 5) . The results of in vivo digestibility by difference method of organic matter (OMd) and energy (GEd) of the liquid bakery by-product, brewers grains, hominy feed and high-moisture corn using a 50% of by-product inclusion into diet and at water-to-feed ratio 2.7:1 (water:dry matter), were not altered by the inclusion level of by-product into the diet. On the other hand, OMd and GEd of mayonnaise, almond meal, cocoa meal and kiwi was studied by regression method through four levels of inclusion (2, 4, 7 and 10%; and 4, 8, 12 and 16% for kiwi), being considered less conventional and riskier by-products. The evolution of ether extract digestibility suggested that the maximum level of inclusion of mayonnaise in the diet should not exceed 8.5%; or 6.1% for almond flour. The evolution of the digestibility of the other nutrients (i.e. Crude Fiber) recommended using cocoa meal and kiwi with caution. In the third study (Chapter 6), it was decided to seek alternative methods, less costly and laborious to than using live animals, and to perform prediction equations for organic matter and energy digestibility and energy content, digestible energy and metabolizable energy of agro-industrial by-products assessed in Chapter 5. Finally, in the last study (Chapter 7), it was evaluated in animals of different ages a wide range of dilution ratios (0:1, dry feed, and 0.6:1, 1.5:1, 2.1:1, 2.7:1 and 3.5:1) to determine those that optimize the digestibility of the… Advisors/Committee Members: [email protected] (authoremail), true (authoremailshow), Gasa Gasó, Josep (director), Castillejos Velázquez, Lorena (director), true (authorsendemail).

Subjects/Keywords: Porcs d'engreix; Cerdos de engorde; Growing-finishing pigs; Alimentació líquida; Alimentación liquida; Liquid feed; Subproductes; Subproductos; By-products; Ciències de la Salut; 636

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APA (6th Edition):

Sol Llop, C. (2016). Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde. (Thesis). Universitat Autònoma de Barcelona. Retrieved from http://hdl.handle.net/10803/400090

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

Chicago Manual of Style (16th Edition):

Sol Llop, Cinta. “Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde.” 2016. Thesis, Universitat Autònoma de Barcelona. Accessed December 14, 2019. http://hdl.handle.net/10803/400090.

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

MLA Handbook (7th Edition):

Sol Llop, Cinta. “Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde.” 2016. Web. 14 Dec 2019.

Vancouver:

Sol Llop C. Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde. [Internet] [Thesis]. Universitat Autònoma de Barcelona; 2016. [cited 2019 Dec 14]. Available from: http://hdl.handle.net/10803/400090.

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

Council of Science Editors:

Sol Llop C. Utilización de subproductos agroindustriales en alimentación líquida para cerdos de engorde. [Thesis]. Universitat Autònoma de Barcelona; 2016. Available from: http://hdl.handle.net/10803/400090

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

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