纤维素分解菌对奶牛生产性能的影响

摘要

为研究纤维素分解菌（KB菌）对奶牛生产性能的影响，本试验选用18头体况良好，胎次相同，体重、日产奶相近的泌乳中期荷斯坦奶牛，随机分为3组，每组6头奶牛，每头奶牛为1个重复。饲喂3种不同处理的日粮，即纤维素分解菌的饲喂量分别为0（对照组）、0.7×1011（试验1组）、1.4×1011cfu/d（试验2组），预饲期10 d，正式期40 d。结果表明，饲喂KB菌40 d后，与对照组相比，试验1组和试验2组4%标准乳产量分别提高3.08%和6.57%，且均差异显著（P＜0.05）。试验2组乳蛋白率提高5.67%，乳脂率提高4.49%，均差异显著（P＜0.05），各处理组乳糖率、非脂乳固体物含量差异不显著（P＞0.05）。%Thi s experiment was conducted to study the effect of KB bacteria on the production performance of dairy cow.Eighteen Holstein cows with similar body weight,parity and milk yield were assigned to 3 treatments group with 6 repli-cates of 1 each which were fed with diet added 0(control),0.7 ×1011(treat 1),1.4 ×1011 cfu/d(treat 2)KB bacteria.Each treat-ment had six repeat.The experiment was lasted for 50 d,including 10 d pre-experiment and 40 d experiment.The result showed that:after feeding for 40 d,the 4%fat corrected milk of the treat 1 and treat 2 were 3.08%and 6.57%significantly higher than that of control(P<0.05),While the milk protein rate and milk fat rate of treat 2 increased by 5.67%and 4.49%, respectively (P<0.05),compared with the control group.Lactose rate and non-fat soild content in each treatments were not significant different(P>0.05).