复合益生菌制剂对奶牛泌乳性能及乳品质的影响

Effects of complex probiotics on milk performance and milk quality of Holstein dairy cows

为研究复合益生菌制剂对奶牛泌乳性能及乳品质的影响,试验选取45头泌乳期相近的荷斯坦奶牛,随机分为3组,对照组、试验1组、试验2组,每组3个重复,每个重复5头。对照组饲喂基础日粮,试验1、2组分别在基础日粮中添加1%、2%的复合益生菌制剂,试验期为60d。结果表明:试验2组在第10、30、60天奶牛产奶量较对照组分别提高2.28%、0.62%、9.08%(P<0.05),试验1组在第10、60天较对照组分别提高4.6%、8.9%(P<0.05);第30天时,试验1、2组乳中总固形物含量较对照组均显著性提高(P<0.05),乳糖率、乳蛋白率、乳脂率之间差异不显著(P>0.05);第60天时,与对照组相比,试验1、2组乳中乳糖率分别提高了4.41%、7.02%(P<0.05),乳蛋白率提高了4.16%、9.97%(P<0.05),总固形物含量提高了2.44%、3.02%(P<0.05),乳脂率含量之间差异不显著(P>0.05)。综上,日粮中添加复合益生菌制剂可有效提高奶牛产奶量及乳品质,且添加2%复方益生菌制剂效果更优。

This study was conducted to investigate the effects of compound probiotics on performance and milk quality of dairy cows. A total of 45 Holstein dairy cows in lactation period were selected and randomly divided into 3 groups with 3 replicates of 5 each. The experimental group added 1% and 2% of the composite probiotics on the basis of the basic diet. The results showed that the milk yield of group 2 were 2.28%,0.62%, 9.08% higher than that of the control group at 10,30 d and 60 d(P<0.05),and the milk yield of group 1 were 4.6%,8.9% higher than that of the control group at 10 d and 60 d(P<0.05). The total solid content in milk of group 1 and group 2 were significantly increased compared with the control group at 30 d(P<0.05). There was no significant difference in lactose rate,lactoprotein rate and milk fat rate among groups at 30 d(P>0.05). On day 60,compared with the control group,the lactose rate of group 1 and group 2 were increased by 4.41%, 7.02%(P<0.05),lactoprotein rate were increased by 4.16%,9.97%(P<0.05),total solid content were increased by 2.44%,3.02%(P<0.05),there was no significant difference in milk fat rate among groups(P>0.05). In summary,the compound probiotic preparation could effectively increase the milk yield and improve the quality of the milk.