Combinations of cholecalciferol and 25-hydroxycholecalciferol as vitamin D sources in white laying hen feed diets

Ciência e Agrotecnologia

Diego Fernando Remolina Rivera¹  Antonio Gilberto Bertechini¹  Tiago Ferreira Birro Oliveira¹  Solange De Faria Castro¹  Henrique Braga Oliveira¹  Manuel Fernando Bobadilla-mendez¹ 

[1],Universidade Federal de Lavras Departamento de Zootecnia Lavras MG ,Brasil

关键词: Vitamin sources;    productive performance;    eggshell quality;    bone characteristics;    Fontes de vitamina;    desempenho produtivo;    qualidade de casca;    caraterísticas ósseas;   

DOI  :  10.1590/S1413-70542014000600006

来源: SciELO

【 摘 要 】

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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