| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Effect of dietary levels of methionine + cystine on performance of broiler breeders
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| Autores: |
Gomes,Paulo Cezar
Lima,Cristina Amorim Ribeiro de
Calderano,Arele Arlindo
Rostagno,Horacio Santiago
Albino,Luiz Fernando Teixeira
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| Data: |
2011-05-01
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| Ano: |
2011
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| Palavras-chave: |
Eggs
Requirement
Sulfur amino acid
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| Resumo: |
The objective of this experiment was to evaluate levels of methionine + cystine levels for broiler breeders from 40 to 60 weeks of age. It was used 288 Cobb broiler breeders, distributed in a randomized experimental design with six levels of methionine+ cystine in the diets (0.39; 0.47; 0.55; 0.63; 0.71 and 0.79%), eight repetitions and six breeders per experimental unit. The diets were isocaloric and isoprotein (2,850 kcal ME/kg and 12.58% CP) and oferred at a fixed amount (155 g) per bird. For the entire studied period, by using polynomial analysis, it was observed a quadratic effect of methionine + cystine levels on the percentage of egg production, on number of eggs per hen housed, on number of eggs per hen and egg weight. There was also a linear effect on shell weight when it was calculated in relation to egg weight. The total methionine + cystine requirement for broiler breeders was calculated at 0.521% for percentage of egg production and number of eggs per hen, which corresponds to a daily intake of 808 mg of methionine + cystine/day. The digestible methionine + cystine requirement for broiler breeders was estimated at 727 mg for laying percentage and number of eggs per hen.
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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=S1516-35982011000500011
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982011000500011
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.40 n.5 2011
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| Direitos: |
info:eu-repo/semantics/openAccess
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