日粮中添加复合益生菌对奶牛生产性能的影响

Effect of Dietary Compound Probiotics on Productive Performance of Dairy Cows

【目的】为探讨相同日粮条件下添加复合益生菌对奶牛生产性能的影响。【方法】选用胎次、体重、产奶量基本相似的荷斯坦奶牛120头,随机分为2组,试验组日粮中添加复合益生菌9×1012个/d.头,试验期100 d,预饲期10 d,试验期90 d。【结果】试验组与对照组相比产奶量分别在60和90 d提高了5.4%和5.24%,差异显著(P<0.05)。试验组乳脂率在60和90 d分别提高了3.21%和3.83%,并在90 d差异显著(P<0.05);试验期内,试验组乳蛋白率略有提高但无显著差异(P>0.05);试验期30 d时试验组的乳糖率和非脂固形物比对照组分别提高了1.41%和1.35%,差异显著(P<0.05),60和90 d无显著变化。与对照组相比,试验期30、60和90 d试验组的奶牛体细胞数分别下降了8.98%、10.15%和21.14%。【结论】日粮中添加复合益生菌可以显著提高奶牛产奶性能和增强奶牛抗病能力。

【Objective】 The study was to research the effects of the supplementation compound microrganic preparation on the productive performance of dairy cows.【Method】The 120 cows with similarity in everyday milk yield and weight were divided into 2 groups randomly.The experiment lasted for 100 days,including 10 days pre-experiment.【Result】 The results showed as follows： The milk yield of the treated group was increased by 5.4% and 5.24% significantly than the control group between the 60 and 90 d（P0.05）.The fat ratio was increased by 3.21% and 3.83% than the control group and it was improved significantly in 90 d（P0.05）;During the experiment period,the protein ratio did not change significantly（P0.05）;the lactose and non-fat solid were increased by 1.41% and 1.35% than the comparative group respectively in 30 d（P0.05）,but there were no difference after 60 and 90 d（P0.05）.To be contrasted with the control group,the SCC of treated group was reduced by 8.98%,10.15% and 21.14% after 30,60 and 90 d.【Conclusion】 It can be concluded that adding the compound probiotics in diary cow diets could significantly improve the animal performance and feed efficiency and boost up body＇s ability of resisting diseases.