绵羊日粮不同碳水化合物比例对纤维物质在消化道不同部位流通量和消化率的影响

EFFECTS OF DIFFERENT PROPORTIONS OF DIETARY STRUCTURAL AND NONSTRUCTURAL CARBOHYDRATES ON FLOW AND DIGESTIBILITY OF FIBRE IN DIFFERENT DIGESTIVE SITES FOR SHEEP FED A WHEAT STRAW DIET

本试验采用１８ 头全部安装有瘤胃和十二指肠瘘管的内蒙古半细毛羊羯羊作为试验动物，利用食糜标记物连续灌注技术，研究了绵羊日粮中６ 个不同的结构性碳水化合物（ＳＣ） 与非结构性碳化合物（ ＮＳＣ） 比例（ 分别为３ ．５２ 、３ ．３２ 、２ ．８６ 、２ ．６４ 、２ ．４０和１ ．８８） 对日粮纤维物质在绵羊消化道不同部位流通量和消化率的影响。结果表明，当绵羊日粮中ＳＣ：ＮＳＣ 比例为２ ．４０ ～２ ．６４（ 即ＮＳＣ 占整个碳水化合物的２７ ．５ ％ ～２９ ．４ ％ ） 时， 不仅有利于日粮纤维物质在绵羊瘤胃内和后肠道的降解与消化，

In this paper,we used 18 Inner Mongolian sheep fitted with the ruminal and duodenal cannulae as all experimental animals,and studied the effects of 6 different ratios of dietary structural carbohydrate (SC) and nonstructural carbohydrate(NSC) on the folws and digestibilities of fibre in different digestive site for sheep fed a wheat straw diet through the continuous infusion technique of labeling digesta,6 different ratios of SC and NSC were 3.52,3.32,2.86,2.64,2.40 and 1.88, respectively.The results show that when the range of dietary SC and NSC ratio is 2.40～2.64,it is beneficial to the degradation and digestion of dietary fibre in the rumen and hindguts of sheep,and also the fibre digestibility will be improved in the whole digestive tract of sheep.