Atualização da proteína ideal para frangos de corte: arginina, isoleucina, triptofano e valina

• Autor(a) principal: Campos, Anastácia Maria de Araújo
• Data de Publicação: 2010
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1770
• topic: Desempenho; Carcaça; Exigências; Performance; Carcass; Requirements; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

Four were carried out to evaluate digestible arginine:lysine (Arg:Lys), isoleucine:lysine (Ile:Lys), valine:lysine (Val:Lys) e tryptophan:lysine (Tryp: Lys) rations for male broilers in two periods: 7 - 21 (starter) and 28 - 40 (finisher) days of age. The methodology used in all the experiments it was same, just modifying the amino acid in study. Like this in all I try them a total 1200 starter and 960 finisher broilers were distributed in a completely randomized experimental design with 6treatments, eight replicates of 25 and 20 birds per experimental unit in the starter and the finisher period, respectively.In the first experiment they were appraised five relationships of Val:Lys dig for the starter period (69, 72, 75, 78 e 81%), and in the finisher (72, 74.5, 77, 79.5 e 82%); In the second of Ile:Lys dig. for the starter period (57; 61; 65; 69 e 73%) and in the finisher (58; 62,5; 67; 71,5 e 76%); in the third of Arg:Lys dig.no período inicial (95, 100, 105, 110, e115%) and in the finisher (91, 98, 105, 112, e 119%); and in the last experiment five Tryp:Lys relation for the starter period (15, 16, 17, 18 e 19%) e and in the finisher (14, 16, 18, 20 e 22%). In all the experiments, the diets were formulated to meet or exceed the nutritional requirements in both periods, except for digestible Lysine (1.08% and 0.98% for the starter and finisher periods, respectively). A control (C+) treatment containing adequate lysine (1.146% start and 1,05% finisher) were included in the experimental design of each experiment. In the end of each experiments were made calculations the weight gain, feed conversion and the carcass characteristics. Different regression models (quadratic, 95% da quadratic, broken line, quadratic plus plateau end exponential) were applied in the results. The recommended dietary digestible Val:Lys, Ile:Lys, Arg:Lys, Tryp:Lys the starter phase are: 77% (0,832% digestible Val), 67% (0,72% digestible Ile), 108% (1,17% digestible Arg) e 17% (0,177% digestible Tryp.), and for the finisher phase are: 78% (0,7644% digestible Val), 69% (0,63% digestible Ile), 108% (1,06% digestible Arg) e 18 % (0,176% digestible Tryp).