Data/hora: 01/06/2024 12:02:19

Provedor de dados: | 65
País: | Brazil
Título: | Digestible threonine-to-lysine ideal ratio for laying hens fed with low-protein diets from 24 to 40 weeks of age
Autores: | Pastore,Silvana Marques; Albino,Luiz Fernando Teixeira; Gomes,Paulo Cezar; Oliveira,Will Pereira de; Viana,Gabriel da Silva; Silva,Eliane Aparecida da; Alves,Warley Junior.
Data: | 2016-12-01
Ano: | 2016
Palavras-chave: | Amino acids; Performance; Egg quality; Ratios among amino acids.
Resumo: | ABSTRACT: This trial was performed to determine the dietary digestible threonine-to-lysine (dig. Thr-to-Lys) ideal ratio for laying hens fed with low-protein diets from 24 to 40 weeks of age. At 24 weeks of age, two hundred forty Hy Line W-36 laying hens were randomly assigned to five treatments, represented by five dig Thr-to-Lys ratios (60; 67; 74; 81 and 88%), with eight replicates each one with six hens per experimental unit. Digestible Thr-to-Lys did not affect laying hen performance and egg quality, except for digestible Threonine intake, which showed linear increase as dig. Thr-to-Lys ratios increased. Linear broken-line model was chosen to analyze data according to lack of fit. According to linear broken-linen estimates, digestible Threonine ideal levels for optimum egg production, egg mass, feed efficiency of lysine utilization for egg mass, feed conversion per egg mass and dozens of eggs and nitrogen balance were 0.610; 0.580; 0.614; 0.599; 0.599 and 0.643%, which correspond respectively to dig Thr-to-Lys ratios of 80; 75; 80; 78; 78 and 83%. The digestible threonine-to-lysine ideal ratio for laying hens from 24 to 40 weeks of age is 80%.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202229
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20150460
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.12 2016
Fonte: | info:eu-repo/semantics/openAccess