| Registro completo |
| Provedor de dados: |
89
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| País: |
Brazil
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| Título: |
Requirement of Digestible Methionine + Cystine to Molted Laying Hens
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| Autores: |
Oliveira Filho,PA
Cruz,FGG
Rufino,JPF
Silva,EM
Viana Filho,GB
Silva,FM
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| Data: |
2019-01-01
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| Ano: |
2019
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| Palavras-chave: |
Amino acid
Egg quality
Hen
Performance
Serum
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| Resumo: |
ABSTRACT The present study aimed to determine the ideal requirement of digestible methionine + cystine to molted laying hens. The experimental period lasted 105 days, divided into five periods of 21 days. 144 Hisex White laying hens with 84 weeks-of-age were used. The experimental design was completely randomized with treatments constituted for six levels of digestible methionine + cystine (0.45, 0.50, 0.55, 0.60, 0.65, and 0.70%) in the diets, with four replicates of six birds each. Data collected were evaluated by polynomial regression at 5%. There was a significant effect (p<0.05) of digestible methionine + cystine on feed intake, energy intake, protein intake, egg production, and egg mass. Internal egg quality presented positive linear effect (p<0.05) on albumen height and yolk color. External egg quality was affected (p<0.05) in eggshell %, eggshell thickness and eggshell resistance, where the level of 0.60% of digestible methionine + cystine in the diets provided eggshells with better quality (higher percentage, thicker and breaking resistance). Differences (p<0.05) were also observed in glucose and triglycerides concentration, with 0.60% of digestible methionine + cystine in the diets presenting better equilibrium. Results of the present study suggested that higher levels of digestible methionine + cystine improved the performance and internal egg quality of molted laying hens. The level of 0.60% of digestible methionine + cystine provided better eggshell and equilibrium on blood biochemistry.
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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=S1516-635X2019000400323
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| Editor: |
Fundação APINCO de Ciência e Tecnologia Avícolas
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| Relação: |
10.1590/1806-9061-2019-1076
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Poultry Science v.21 n.4 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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