| Registro completo |
| Provedor de dados: |
Ciência e Agrotecnologia
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| País: |
Brazil
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| Título: |
Combinations of cholecalciferol and 25-hydroxycholecalciferol as vitamin D sources in white laying hen feed diets
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| Autores: |
Rivera,Diego Fernando Remolina
Bertechini,Antonio Gilberto
Oliveira,Tiago Ferreira Birro
Castro,Solange de Faria
Oliveira,Henrique Braga
Bobadilla-Mendez,Manuel Fernando
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| Data: |
2014-12-01
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| Ano: |
2014
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| Palavras-chave: |
Vitamin sources
Productive performance
Eggshell quality
Bone characteristics
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| Resumo: |
The effect of cholecalciferol (D3) and 25-hydroxycholecalciferol (25-OHD3) as isolated or associated sources of vitamin D (100%-0%, 75%-25%, 50%-50%, 25%-75%, 0%-100%) on the productive performance, egg quality, and bone characteristics was evaluated in white egg-laying hens fed two levels of calcium (Ca) and phosphorus (P) in the basal diet (BD) (BD1 = 0.38% Ca - 0.36% available P and BD2 = 3.2% Ca - 0.30% available P). Nine hundred and sixty Dekalb White hens (24 weeks old) were distributed into 80 cages, under a completely randomized factorial design for 16 weeks. The use of associated sources of vitamin D reduced the feed intake and feed conversion ratio, as well as BD1, which also increased the egg production and egg mass. The association of vitamin D sources with up to 50% 25-OHD3 increased the eggshell percentage. There was interaction (p<0.05) between the sources of vitamin D and the concentrations of Ca and available P, sources with at least 50% 25-OHD3 increased ash percentage and bone radiographic densitometry (BRD) with BD1; in BD2 the use of 25-OHD3 as isolated vitamin D source increased BRD. The association of D3 and 25-OHD3 improved the productive performance, increased the percentage of eggshell and had different positive effects on the bone characteristics that depend on the concentrations of Ca and available P in the balanced feed of white egg-laying 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=S1413-70542014000600006
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| Editor: |
Editora da Universidade Federal de Lavras
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| Relação: |
10.1590/S1413-70542014000600006
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| Formato: |
text/html
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| Fonte: |
Ciência e Agrotecnologia v.38 n.6 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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