不同过瘤胃淀粉日粮对泌乳奶牛消化代谢的影响  

Effects of different bypass starch diets on digestibility and metabolism of lactating cows

作　　者：齐智利[1] 嘎尔迪[2] 卢寿锋[3] 陈慧君 赵芙蓉 

机构地区：[1]华中农业大学动物科技学院,湖北武汉430070 [2]内蒙古农业大学动物科技学院,内蒙古呼和浩特010018 [3]廊坊市农林科学院,河北廊坊065000 [4]湖北永福能源科技有限公司,湖北武汉430071 [5]牧泉元兴饲料有限责任公司,内蒙古呼和浩特010070

出　　处：《草业科学》2006年第7期73-78,共6页Pratacultural Science

基　　金：国家自然科学基金"玉米的加工处理对瘤胃发酵和氮排出量影响的研究(30060061)"的一部分

摘　　要：以3头体况良好,安装有永久性瘤胃瘘管的泌乳前期奶牛为试验动物,在日粮精粗比为55∶45的前提条件下,采用3×3完全拉丁方试验设计,研究了3种不同过瘤胃淀粉日粮对泌乳奶牛消化代谢的影响。研究结果表明:3组不同日粮对营养物质的采食、排泄以及消化利用有着一定的规律性。3组不同日粮之间的采食量和消化率无明显差异(P>0.05);低过瘤胃淀粉日粮组的粪NDF排出量明显高于其他2组(P<0.05),其他2组之间差异不显著(P>0.05),粪中其他营养物质的排出量3组之间没有差异(P>0.05)。与对照组相比,其他2组均使尿氮排出量降低,其中高过瘤胃淀粉日粮组达到了显著水平(P<0.05),并且高过瘤胃淀粉日粮的氮沉积量和可消化氮转化为沉积氮的效率也明显高于其他2组(P<0.05),其他2组之间差异不显著。The experiment was conducted in 3 × 3 Latin Square design to investigate the effect of three bypass starch on digestibility and metabolism of lactating cows. Three diets were formulated to the ratio of concentrate to roughage 55：45 and three healthy early-lactating cows fitted with fistula were offered one of the three diets. The results showed that three diets had a similar effect on nutrient intake, digestibility and excretion. Feed intake and digestibility didn＇t differ due to dietary treatments （P〉0.05）. Low hypass starch diet resulted in a higher excretion than did the other two diets between which no significant difference was observed （P〉0.05）. There were no significant differences in excretion of other nutrients among the three diets （P〉0.05）. Compared with the control, the other two diets both resulted in a decreased excretion of urea nitrogen and the difference resulted from high bypass starch approached statistical significance. Also, nitrogen rentention and the efficiency of digestible nitrogen transforming into deposition nitrogen were significantly higher （P〈0.05） in high bypass starch diet than in the other two diets between which no significant difference was observed.

关 键 词：过瘤胃淀粉日粮 泌乳奶牛 消化代谢 

分 类 号：S823.91[农业科学—畜牧学]