【摘要】 选取 4只健康、装有瘤胃瘘管和十二指肠瘘管的成年羯羊 ,采用 4× 4拉丁方试验设计的方法 ,研究在玉米秸秆为主的粗料日粮中添加不同水平的脂肪酸钙皂 ( 2 % ,4 %和 6% )对绵羊消化性能的影响。结果表明 ,添加 6%水平的脂肪酸钙的日粮的干物质采食数量明显低于其他组 ( P<0 .0 5) ,酸性洗涤纤维 ( NDF)摄入量与对照组间差异显著 ( P<0 .0 5)。不同脂肪酸钙水平对绵羊营养物质的摄入量没有显著影响 ( P>0 .0 5)。随着脂肪酸钙水平的增加 ,瘤胃 p H值也提高 ,其中 ,4 %水平组与对照组间差异极显著 ( P<0 .0 1) ,2 %组和 6%组与对照组间差异显著 ( P<0 .0 5)。添加脂肪酸钙能降低瘤胃氨氮的浓度 ,4 %和 6%水平组与 2 %组和对照组间差异显著 ( P<0 .0 5)。不同水平脂肪酸钙影响绵羊营养物质的消化率 ,6%水平组的绵羊对日粮中 NDF和中性洗涤纤维 ( ADF)的消化率明显低于对照组 ( P<0 .0 5) ,对脂肪酸的表观消化率 4 %和 6%水平组低于其他组 ( P<0 .0 5)。更多还原

【Abstract】 Four mature wethers with ruminal and duodenal cannulas were fed four diets(mainly contain corn straw) in a 4×4 latin square to study the effects of varing level of calcium soap on nutrient digestion in sheep. The results showed that intake of dry matter at 6% addition level was significantly decreased compared with other treatments( P <0.05). There was no difference in the intake of N,ME,ADF,EE among the treatments. With increasing addition level of calcium soap, ruminal pH was increased. There was significant difference in ruminal pH( P <0.01)between 4% addition level and the control,and 2% or 6% addition level and the control( P <0.05). Addition of calcium soap resulted in reduced ruminal NH 3 N concentration; a significant reduction in ruminal NH 3 N concentration was observed at the level of 4% and 6% over 2% addition level and the control ( P <0.05). Addition level of calcium soap affected nutrient digestion. The digestibility of NDF and ADF at the 6% level was greatly reduced compared with the control( P <0.05); digestibility of fatty acid at 4% or 6% level was also lower than other treatments( P <0.05). No difference in the apparent digestibility was found for DM,N and ME.更多还原