| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Nutritional requirements of digestible threonine for growing meat-type quails
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| Autores: |
Ton,Ana Paula Silva
Furlan,Antonio Claudio
Martins,Elias Nunes
Batista,Eliany
Pasquetti,Tiago Junior
Scherer,Carina
Iwahashi,Alexandre Shigueki
Quadros,Thays Cristina Oliveira de
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| Data: |
2013-07-01
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| Ano: |
2013
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| Palavras-chave: |
Carcass composition
Performance
Synthetic amino acids
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| Resumo: |
The objective of this study was to estimate the nutrient requirements of digestible threonine for meat-type quails (Coturnix coturnix sp) in the growth phase. A total of 1350 not sexed meat-type quails were distributed in a completely randomized design with six threonine levels (10.80, 11.50, 12.20, 12.90, 13.60 and 14.30 g/kg as fed), five replications and 45 quails per experimental unit, from 1 to 14 days of age. The threonine levels in the diet had a quadratic effect on body weight, feed intake and weight gain. Estimates for highest body weight (79.41 g), feed intake (128.96 g/bird) and weight gain (70.73 g) were observed with diets containing 12.60 g/kg of digestible threonine. According to the LRP model, the threonine intake was estimated at 13.40 g/kg of digestible threonine. Protein deposition rate and energy retained in the carcass showed quadratic effect, with estimated digestible threonine levels of 11.80 and 12.00 g/kg in the diet for maximum protein deposition rate (2.00 g/bird) and retained energy in the carcass (15.88 kcal/g), respectively. There was a linear effect on feed cost per kg of live weight gain as threonine levels were increased. Nutritional requirement of digestible threonine for meat-type quails for maximum growth is 12.60 g/kg, corresponding to a digestible threonine:digestible lysine ratio of 67.02.
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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=S1516-35982013000700007
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982013000700007
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.42 n.7 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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