Data/hora: 01/06/2024 17:20:57

Biblioteca(s): | Embrapa Suínos e Aves.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 11/05/2017
Data da última atualização: | 11/05/2017
Autoria: | FRANCO, S. M.; TAVERNARI, F. de C.; MAIA, R. C.; BARROS, V. R. S. M.; ALBINO, L. F. T.; ROSTAGNO, H. S.; LELIS, G. R.; CALDERANO, A. A.; DILGER, R. N.
Afiliação: | SEBASTIAN M., Premex S.A.; FERNANDO DE CASTRO TAVERNARI, CNPSA; ROSANA CARDOSO MAIA, UFV; VICTOR R. S. M. BARROS, UFV; LUIZ FERNANDO TEIXEIRA ALBINO, UFV; HORÁCIO SANTIAGO ROSTAGNO, UFV; GUILHERME RODRIGUES LELIS, UFV; ARELE ARLINDO CALDERANO, UFV; RYAN NEIL DILGER, University of Illinois.
Título: | Estimation of optimal ratios of digestible phenylalanine + tyrosine, histidine, and leucine to digestible lysine for performance and breast yield in broilers.
Ano de publicação: | 2017
Fonte/Imprenta: | Poultry Science, v. 96, p. 829-837, 2017.
Idioma: | Inglês
Conteúdo: | ABSTRACT Three experiments were carried out to estimate the optimal ratios of digestible phenylalanine + tyrosine (Phe + Tyr), histidine (His), and leucine (Leu) relative to digestible lysine (Lys) for performance and carcass criteria of Cobb-500 broilers from 8 to 17 d of age. In each experiment, 160 male chicks were allocated to a completely randomized experimental design with eight replicate pens, each receiving five dietary treatments. A common, semi-purified basal diet was formulated to meet all dietary recommendations except for those of the tested amino acids (i.e., Phe + Tyr, His, and Leu). Growth performance and carcass characteristics data were analyzed using various requirement-estimation models, including 95% of the quadratic regression, linear response plateau (LRP; i.e., stepwise regression), LRP-to-quadratic regression ratio; and quadratic broken line (QBL). Graded digestible Phe + Tyr ratios elicited a quadratic response (P < 0.05) in body weight gain and linear responses (P < 0.05) in breast and breast fillet weights. Linear effects (P < 0.05) were also observed when graded ratios of digestible His were fed for feed intake and weight gain, and quadratic responses (P < 0.05) were noted for feed conversion ratio and breast and breast fillet weights and yields. Graded Leu ratios elicited quadratic responses (P < 0.05) in feed intake, weight gain, and breast and breast fillet weight and yield. Based on growth and carcass parameters, the estimated ideal digestible ratios of Phe + Tyr, His, and Leu relative to digestible Lys were 112, 38, and 104%, respectively, for broiler chicks raised from 8 to 17 d of age.
Palavras-Chave: | Digestible amino acid; Peito de frango.
Thesagro: | Aminoácido; Digestibilidade; Enzima; Frango de corte; Nutrição animal; Sistema de produção.
Thesaurus Nal: | Animal nutrition; Breast meat; Broiler chickens; Digestibility; Histidine; Leucine; phenylalanine; Poultry production; tyrosine.
Categoria do assunto: | --
Registro original: | Embrapa Suínos e Aves (CNPSA)
Exemplares: | CNPSA - (21039-1) - UPC - AP - DD -  -  -  - DIS