| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Effect of vitamin K on bone integrity and eggshell quality of white hen at the final phase of the laying cycle
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| Autores: |
Fernandes,Jovanir Inês Müller
Murakami,Alice Eiko
Scapinello,Claudio
Moreira,Ivan
Varela,Elkin Varela
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| Data: |
2009-03-01
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| Ano: |
2009
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| Palavras-chave: |
Eggshell quality
Layer
Osteoporosis
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| Resumo: |
The effect of four levels of dietary vitamin K (vit. K) on production, egg quality and bone structure of laying hens near the end of the production cycle were studied. A total of 192 Hy-Line, W-36 hens, 67 weeks of age, were distributed into a completely randomized design with four treatments (0, 2, 8, 32 mg vit. K/kg of diet), six replicates and eight birds per experimental unit. Corn-soybean-meal basal diets were isonitrogenous (15.5% crude protein), isoenergetic (2,790 kcal ME/kg), isocalcium (4.25% Ca) and isophosphorus (0.40% available P). Vitamin K supplementation did not alter egg mass, feed intake, feed conversion (kg/kg), bone breaking strength, specific egg gravity, eggshell weight, thickness and percentage of thin and cracked shell. A linear effect on egg weight, laying percent, and feed conversion (kg/dozen) was observed, as well as a quadratic effect on the ash bone content. In conclusion, the inclusion of increasing levels of vitamin K to the diet influenced performance and bone mineralization, but not eggshell quality. The lack of consistency in the efficiency of supplemental vitamin K on eggshell quality may be due to the age of hens.
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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=S1516-35982009000300013
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982009000300013
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.38 n.3 2009
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| Direitos: |
info:eu-repo/semantics/openAccess
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