稻草秸秆微生物饲料在山羊瘤胃内DM动态降解参数的研究

试验选用3只健康的安装永久性瘤胃瘘管的波杂羊，采用尼龙袋法测定不同稻草秸秆微生物饲料的动态降解参数。结果表明：发酵饲料DM的快速降解部分（a）、慢速降解部分（b）、降解速度（c）、有效降解率（ED）在不同含水量、不同发酵时间下有显著差异，a、b值变化趋势一致，c、ED值的变化趋势一致。其中以60％组发酵30d饲料的a、b、ED值最高，分别为7．60％、39．37％、38．75％，高于0d（P〈0．01）、10d（P〈0．01）、20d（P〈0．05）的发酵饲料；c值为0．0758／h，显著高于0d（P〈0．01）。结果显示，含水分60％的饲料发酵30d的降解速度最快，DM有效降解率最高。

Study on the DM Dynamic Degradation Parameters of Straw Microbial Feeds in the Rumen with Goat

Three ruminally cannulated goats were used to investigate the DM dynamic degradation parameters of straw microbial feeds with in situ. The results show that： Rapid degradation part of D M （a） ,the slow degradation of part（b） ,the degradation rate（ c）, effective degradation rate（ ED ） with fermented feeds had significant differences in different moisture content and fermentation time, a and b value changed in the same, variation of c, ED agreement. The 60% group of 30 d fermentation feeds a, b, ED value was the highest,respectively 7.60% ,39.37% ,38.75% ,0 higher than 0 d（ P 〈0.01 ） , 10 d （ P 〈 0. 01 ） ,20 d （ P 〈 0. 05 ） ; the c value was 0. 075 8/h, significantly higher than 0 d （ P 〈 0. 01 ）. The results suggest that, the degradation speed was the fastest of water containing 60% through 30 d fermented feed,and the DM effective degradation rate was highest.