Data/hora: 23/09/2024 16:39:57

Biblioteca(s): 	Embrapa Suínos e Aves.	
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