高锌日粮对蛋鸡生产性能和蛋锌含量影响的研究

EFFECT OFDIETARY ZnLEVEL ON THE PERFORMANCE OF THE LAYING HENS AND ZINC CONTENT IN EGG

４０周龄伊莎蛋鸡２００只，随机分为４组，分别饲喂基础日粮（Ｉ组），添加锌１００ｍｇ／ｋｇ（Ⅱ组），１０００ｍｇ／ｋｇ（Ⅲ组）和酵母锌４０ｍｇ／ｋｇ（Ⅳ组）。饲喂６０日后，Ｉ组、Ⅱ组、Ⅲ组和Ⅳ组鸡蛋中的锌含量分别为１０．６１、１８．３１，２１．２７和２３．７１μｇ／ｇ。Ⅱ组产蛋率明显上升（Ｐ＜０．０５），破壳率明显下降（Ｐ＜０．０５）；Ⅲ组和Ⅳ组产蛋率显著增加（Ｐ＜０．０１），玻壳率和料蛋比显著下降（Ｐ＜０．０１），同时试验鸡无异常表现，解剖后组织器官也无病理变化，实验表明，通过对蛋鸡饲喂高锌日粮增加蛋中的锌含量效果显著。

00 1aying hens(40 weeks old)were randomly, divided-into 4 groups。Each group was fed with a control diet,while groups Ⅱ andⅢwere sup-plemented with 100 mg/kg and 1000 mg/kg of zinc sulfate respectivelv。 Gro-up Ⅳ was supplemented with 40/kg yeast zinc,At the end of 60 days pe-riod,the eggs of group I、Ⅱ、Ⅲ and Ⅵ were assaved to contain 10.61。18.31,21.27 and 23.71μg/g of zinc respectively。Performance of the laverswas better with zinc supplementation。No pathological change was obser-ved。