Suplementação de probióticos em dietas de frangos de corte: desempenho e digestibilidade da proteina

• Ano de defesa: 2011
• Autor(a) principal: Luengas, Jorge Armando Prada
• Orientador(a): Albino, Luiz Fernando Teixeira
• Banca de defesa: Hannas, Melissa Izabel , Vieites, Flávio Medeiros
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Triptofano; Energia metabolizável; Poedeiras leves
• Palavras-chave em Inglês: Tryptophan; Metabolizable energy; Hens
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5734

Two experiments were conducted in the poultry unit of the department of animal science in the Federal University of Viçosa to evaluate the effect of probiotic supplementation in broiler diets in the performance of the animals and in the digestibility of dry matter and crude protein of the diets. In the first experiment 2016 Cobb male broiler chicks were used from 01 to 42 days of age, distributed in a randomized complete block design with twelve treatments in a factorial sketch 6 x 2 (inclusion or not of the probiotics in the diets and two levels of metabolizable energy) with eight repetitions of twenty-one birds each. The treatments used were T1 and T7= Negative control (NC); T2 and T8= NC + BMD 11% (PC); T3 and T9= NC + CHCC11407 (NC + P1); T4 and T10= NC + DSM17299 - Gallipro® (NC + P2); T5 and T11= NC + DSM 19489 HLB (NC + P3); T6 and T12= NP and P2 in the finishing phase. The diets of the treatments 1 to 6 were formulated according the recommendations of the brazilian tables, meanwhile the treatments 7 to 12 were calculated by reducing the metabolizable energy levels in 100 kcal/kg of the feed. The energy level of the feed affected the performance characteristics of the broilers regardless the supplementation or not with probiotics or antibiotics in all the stages of life, and the diets with lower metabolizable energy levels provided a higher feed intake in the birds (from 1.21 and 2.37%), reduction in the weight gain in a 2.37% and consequently the feed conversion got worse and went from 1.32 to 3.58%, depending of the stage of life. The addition of probiotic DSM19489 in broilers feed in a challenging sanitary condition proved to be efficient in the performance of the birds due to the improvement in the weight gain in a 2.32% and together with the probiotic CHCC11407 improved 2.29% in average the feed conversion and also increased the productive efficiency rate in 5.07% and 5.26% respectively. The second experiment performed was a metabolism assay using 480 animals in a randomized block design, the treatments being the same to those from the first experiment, with eight repetitions of five birds per experimental unit. The addition of the probiotics and antibiotics in broiler diets in terms of challenge in sanitary conditions, proved to be efficient, providing an improvement of 6.79% and 3.64% respectively in the digestibility of dry matter and apparent crude protein.