青贮苜蓿对奶牛生产性能、瘤胃发酵及血液生化指标的影响

Effects of silage alfalfa on production performance,rumen fermentation and blood biochemical indexes of cows

文章旨在研究青贮苜蓿对奶牛生产性能、瘤胃发酵及血液生化指标的影响。试验选择年龄、体重、胎次、产奶量相近的泌乳期奶牛30头,随机分为2组,每组3个重复,每个重复5头。其中,对照组饲喂玉米-苜蓿干草型常规日粮,试验组用青贮苜蓿替代苜蓿干草,其他成分不变,试验共计30 d。结果显示:(1)与对照组相比,试验组奶牛总产奶量(TMP)、平均日产奶量(ADMP)显著提高(P<0.05);与对照组相比,试验组奶牛料奶比(F/M)显著降低(P<0.05)。(2)与对照组相比,试验组奶牛pH、氨态氮(AN)显著降低(P<0.05);与对照组相比,试验组奶牛挥发性脂肪酸(VFA)、丁酸(BA)显著提高(P<0.05)。(3)与对照组相比,试验组奶牛血清中总蛋白(TP)、白蛋白(ALB)分别显著提高2.8%、7.4%(P<0.05)。结论:在奶牛日粮中用青贮苜蓿替代苜蓿干草可以提高奶牛生产性能,改善瘤胃发酵。

The purpose of this experiment was to study the effects of silage Alfalfa on the production performance,rumen fermentation and blood biochemical indexes of cows.Thirty lactating cows with similar age,weight,parity and milk yield were randomly divided into two groups,with 3 replicates in each group and 5 cows in each replicate.Among them,the control group was fed with corn alfalfa hay type conventional diet,and the test group was fed with silage alfalfa instead of alfalfa hay,with other components unchanged,for a total of 30 days.The results showed that:(1)Compared with the control group,the TMP and ADMP of the experimental group were significantly increased(P<0.05);Compared with the control group,the F/M of the test group was significantly lower(P<0.05).(2)Compared with the control group,the pH value and AN of the cows in the test group were significantly decreased(P<0.05);Compared with the control group,the VFA and BA in the experimental group were significantly increased(P<0.05).(3)Compared with the control group,the TP and ALB in the serum of the cows in the test group increased by 2.8%and 7.4%respectively(P<0.05).Conclusion:Using silage alfalfa instead of alfalfa hay in the diet of cows can improve the production performance of dairy cows and improve rumen fermentation.