超量添加矿物质对肥育猪生产性能及组织中某些微量元素含量的影响

EFFECT OF EXCESSIVE SUPPLEMENTION OF MINERAL PREMIX ON PERFORMANCE AND TRACE-MINERAL CONTENTS IN TISSUES OF PIG

本试验采用２５头６０～１０ｋｇ社长大肥育猪，随机分为５组、分别饲喂基础日粮添加０．５％（Ｉ组）、１％（Ⅱ）、２％（Ⅲ）、３％（Ⅳ）和４％（Ⅴ）的实用矿物添加剂，持续饲喂２７天，观察超量添加矿物添加剂对其生产性能及组织中微量元素含量的影响。结果表明，添加高于１％的本试验添加剂，使猪的日粮增重和日采食量明显降低，而料肉比明显升高；另外，使猪各组织钻含量明显升高（Ｐ＜０．０５），肝、脾硒含量明显升高（Ｐ＜０．０５），而肌肉、肾、心脏硒含量则明显降低（Ｐ＜０．０５），即机体内各组织中硒含量的分布发生改变。

Twenty-five cross- bred pigs(60～70 kg)were randomly assigned(five per diet)to a basal dietsupplemented mith 0.5%premix(I),the basal diet supplemented with 1%premix (Ⅱ),the basal dietsupplemented with 2%ptemix(Ⅲ),the basal diet supplemented with 3%premix(Ⅳ)and the basal dietsupplemented with 4%premix(Ⅴ).The duration was 27 days, It was obserned that the performances of pigs weremarkedly reduced by the basal diets supplemented with more than 1%premix, whereas Co concentrations in thetissues were markedly increased,and Se contents in the tissues were changed.