| Registro completo |
| Provedor de dados: |
Ciência Rural
|
| 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
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
