紫云英青贮饲料在猪体内的氮素代谢及对猪的增重和胴体品质的影响

The Nitrogen Metabolism of Ensilaged Milk Vetch in Pigand the Effects of Ensilaged Milk Vetch on theGrowth and Carcass Quality of Pig

应用１５Ｎ标记紫云英青贮饲料饲喂生长猪，研究了猪对紫云英青贮饲料中氮的代谢规律。证明猪对青贮饲料中粗蛋白质的消化率为５３．７５％，猪粪、尿对青贮饲料中Ｎ素的回收率分别为３９．３６％和２４．７１％。紫云英青贮饲料和配合饲料按１∶２比例（干物计）饲养猪，能使猪正常生长并提高猪胴体的瘦肉率和瘦肉中蛋白质含量，为紫云英用作青贮饲料提供了科学依据。

When pig feeds the ensilaged Milk Vetch(Astragalus sinticus L.)marked 15N,the pig can absorb 53.75% of crude protein of the ensilaged Milk Vetch,and the pig dung and urine can recover 39.36% and 24.70% of N-contained matter from ensilaged Milk Vetch.When the pig feeds the ensilaged Milk Vetch mixed up with compound feed,the pig grows normally,and the lean meat ratio and protein-contained in the lean meat can be raised.So scientific basis is provided for Milk Vetch to be used as ensilaged feed.