不同挤奶次数对奶牛产奶量的影响分析

Analysis of Influence of Different Milking Times on Milk Yield of Dairy Cows

[目的]分析增加挤奶次数对不同阶段泌乳奶牛产奶量的提升,找出最佳挤奶管理方案,为有效提升牧场效益提供理论依据。[方法]将泌乳牛只随机分为两组,保证不同胎次、不同产犊阶段平均泌乳量相当,分组后两组分别保持3次挤奶和4次挤奶1个月。对牧场不同挤奶次数奶牛泌乳量进行统计汇总整理分析。[结果]增加挤奶次数能有效提高奶牛泌乳量(P<0.05);泌乳量高于45 kg奶牛增加挤奶次数对产奶量的提升,显著高于泌乳量低于45 kg的奶量(P<0.05);增加挤奶次数显著提升头胎牛产量2.33 kg,二胎牛产量2.31 kg,三胎及以上牛奶产量2.78 kg(P<0.05);不同泌乳阶段,增加挤奶次数能有效提高泌乳初期及产奶高峰期的产奶量(P<0.05)。[结论]增加挤奶次数能有效提升奶牛泌乳量,对高产及处于产奶初期及高峰期的奶牛提升效果最佳。

[Objective]To analyze the improvement of milk yield of lactating cows at different stages by increasing milking times,and find out the best milking management scheme,so as to provide theoretical basis for effectively improving pasture benefits.[Method]The lactating cows were randomly divided into two groups to ensure that the average milk yield at different parity and calving stage was the same.After grouping,the two groups were milked three times and four times for one month,respectively.The milk yield of cows with different milking times in pasture was summarized and analyzed statistically.[Result]Increasing milking times could effectively improve milk yield of cows(P<0.05).The increase of milking times of dairy cows with milk yield higher than 45 kg was significantly higher than that of cows with milk yield lower than 45 kg(P<0.05).Increased milking times significantly increased the yield of first-born cows by 2.33 kg,second-born cows by 2.31 kg,and third-born cows by 2.78 kg(P<0.05).In different lactation stages,increasing milking times could effectively increase milk yield in early lactation and peak milk production(P<0.05).[Conclusion]Increasing milking times can effectively improve milk yield of cows,and the improvement effect is the best for cows with high yield and at the early and peak milk production.