Experiment (1): Three mongolia wethers fitted with permanent rumen fistula were chosen to measure DM and OM degradabilities in stiu of four diets with different ratio of structural and nonstructural carbohydrates (SC and NSC) (1.26,1.71,2.28 and 2.80 ).

• 试验(一):选用3 只健康；并安装永久瘤胃瘘管的蒙古羯羊；用尼龙袋法；分四期测定了结构性碳水化合物(SC):非结构性碳水化合物(NSC)比例为1.；26、1