| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Avic.
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| País: |
Brazil
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| Título: |
Digestible Threonine to Lysine Ratios for Meat-Type Quails
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| Autores: |
Castro,MR
Pinheiro,SRF
Oliveira,RG
Abreu,LRA
Mota,LFM
Miranda,JA
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| Data: |
2020-01-01
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| Ano: |
2020
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| Palavras-chave: |
Amino acids
Coturnix coturnix ideal protein
Performance
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| Resumo: |
ABSTRACT Three experiments were conducted to estimate the optimal digestible threonine to lysine ratios (Thr:Lys) of meat-type quails during the pre-starter (1 to 7 days), starter (8 to 14 days) and grower I (15 to 21 days) phases. In each experiment, 600 birds were distributed according to a completely randomized experimental design into five treatments, consisting of five dietary Thr:Lys ratios (0.66, 0.71, 0.76, 0.81 and 0.86%), with eight replicates of 15 quails each. Performance parameters and intestinal morphology were evaluated. During the pre-starter phase, feed intake, threonine intake, weight gain, and ileal villus height linearly increased (p<0.01) as dietary digestible Thr:Lys increased. During the starter phase, increasing digestible Thr:Lys ratios had a linear effect (p<0.01) on threonine intake and livability, and linear and quadratic effects (p<0.01) on feed intake. During the grower I phase, increasing digestible Thr:Lys ratios promoted linear increase in threonine intake and feed conversion ratio (p<0.05), and a linear decrease in weight gain. The estimated digestible Thr:Lys ratios recommended for meat-type quails are 0.85, 0.73 and 0.66%, for the pre-starter, starter and grower I phases, respectively.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100302
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| Editor: |
Fundação APINCO de Ciência e Tecnologia Avícolas
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| Relação: |
10.1590/1806-9061-2017-0636
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Poultry Science v.22 n.1 2020
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| Direitos: |
info:eu-repo/semantics/openAccess
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