不同牧草在肉羊瘤胃中的降解特性研究

Study on degradation characteristics of different forages in rumen of sheep

研究旨在评估不同牧草干物质(DM)和粗蛋白(CP)在反刍动物瘤胃内的降解特性。以3只安装永久性瘤胃瘘管的陶赛特肉羊为试验动物,对常见的6种牧草的瘤胃降解特性进行分析。结果显示:苜蓿的DM和CP瘤胃实时降解率显著高于其他牧草(P<0.05),羊草的DM和CP瘤胃实时降解率最低。不同牧草的DM有效降解率排序为:苜蓿>沙打旺>燕麦草>狗尾草>象草>羊草,CP有效降解率排序为:苜蓿>沙打旺>象草=燕麦草>狗尾草>羊草。研究表明,豆科牧草苜蓿和沙打旺在瘤胃中的降解率高于禾本科牧草象草、燕麦草、狗尾草和羊草。

The study was to evaluate the degradation properties of DM and CP of different forages in rumen of ruminants.The rumen degradation characteristics of six common pastures were analyzed by using three Dorset mutton sheep with permanent rumen fistulas as experimental animals. The results showed that the rumen real-time degradation rate of DM and CP of alfalfa was significantly higher than that of other forages(P<0.05), and the rumen real-time degradation rate of DM and CP of Leymus chinensis was the lowest. The order of DM effective degradation rate of different pastures was alfalfa > Satawang > oat grass > Foxtail> elephant grass > Leymus chinensis, and the order of CP effective degradation rate was alfalfa > Satawang > elephant grass = oat grass > Foxtail > Leymus chinensis. The study indicates that the degradation rate of the legumes alfalfa and Satawang in rumen is higher than that of elephant grass, oat grass, Foxtail and Leymus chinensis.