Data/hora: 03/06/2024 02:12:24

Provedor de dados: | 65
País: | Brazil
Título: | Digestible methionine + cysteine: lysine ratios for growing meat-type quails
Autores: | Castro,Mariana Resende de; Pinheiro,Sandra Regina Freitas; Miranda,Jéssica Amaral; Costa,Leonardo da Silva; Rocha,Graziela Maria de Freitas; Oliveira,Renata Gomes de; Martins,Paulo Gustavo Macedo de Almeida.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Coturnix coturnix; Ideal protein; Performance; Sulfur amino acids.
Resumo: | ABSTRACT: The objective was to estimate the most appropriate digestible methionine + cysteine:lysine ratios for growing meat-type quails (Coturnix coturnix) from 1 to 21 days of age. Quails were fed with a basal ration deficient in digestible methionine + cysteine, with five levels of DL-methionine, in substitution of glutamic acid and starch, resulting in digestible methionine + cysteine:lysine ratios of 0.61, 0.66, 0.71, 0.76 and 0.81. Feed and methionine + cysteine intake, body weight gain, feed conversion and uniformity were assessed. From 1 to 7 days, an increasing linear effect was observed for feed and methionine + cysteine intake, body weight gain, and uniformity, and a linear decrease for feed conversion. From 8 to 14 days, the 0.70 methionine + cysteine: lysine ratio was the best for feed intake and body weight gain, and for uniformity, the 0.75 methionine + cysteine:lysine ratio was the most appropriate. For methionine + cysteine intake and feed conversion, an increasing and decreasing linear adjustment was observed, respectively. From 15 to 21 days, an increasing linear effect was observed for feed and methionine + cysteine intake and body weight gain; a decreasing linear effect was observed for feed conversion. The 0.81 ratio was the most efficient for feed conversion during all evaluated experimental periods. In conclusion, the 0.81 dietary methionine + cysteine:lysine ratio is the most appropriate for meat-type quails during the first 21 days of age.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600652
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20170424
Formato: | text/html
Fonte: | Ciência Rural  v.48 n.6 2018
Fonte: | info:eu-repo/semantics/openAccess