日粮中添加高微量元素苜蓿干草对杜泊羊生产性能的影响

Effects of Lucerne Hay with Higher Content of Trace Elements in Diets on Performance of Dorper Sheep

通过在杜泊羊的日粮中添加高硒、高硒钴、高硒钴锌以及高硒钴锌铁4种苜蓿青干草，研究这4种高微量元素首蓿青干草在添加量为5％～15％的情况下对羊的采食性能、日增重和饲料的转化等方面的影响。试验结果表明，和添加普通苜蓿青干草相比，4种苜蓿青干草均能在不同程度上提高羊的增重，有利于饲料的转化与利用，并且饲喂安全，无副作用。其中添加15％的高硒钴锌苜蓿青干草效果最好，增重比对照提高了59．4％，料肉比（3．25）比对照降低了37．5％；在日粮中添加10％的高硒（Se）、钴（Co）、锌（Zn）、铁（Fe）苜蓿青干草，效果接近前者，日增重比对照提高了58．0％，料肉比（3．55）比对照降低了31．7％。

The comparative trials for study the effects of 4 kinds of high-trace element Lucerne hays （high Se,high Se-Co, high Se-Co-Zn,high Se-Co-Zn-Fe ）on feed appetite,daily weight gain and feed con- version of Dorper sheep based on the ration with 5%～15 % of Lucerne hay. The results showed that all of 4 kinds of high-trace element Lucerne hays can improve feed appetite and enhance feed intake and daily weight gain with no harmful side effects compared with common lucerne hay. lucerne hay with high Se-Co-Zn have the best effects of weight gain and feed conversion efficiency supplemented with 10% of the ration , daily weight gain enhanced by 59.4% , feed-meat ratio（3.25） decreased by 37. 5% respectively, lucerne hay with high Se-Co-Zn-Fe also have better effects supplemented with 10% of the ration,daily weight gain enhanced bv 58.0% and feed-meat ratio（3.55） decreased by 31.7% .