奶牛乳体细胞数与泌乳月份和乳成分的相关分析  

Correlation Analysis of Somatic Cell Count on Lactation Month and Milk Composition from Dairy Farm

作　　者：李馨[1] 邹天红 邵广 李峥[1] 杨海涛[2] 

机构地区：[1]黑龙江八一农垦大学动物科技学院,黑龙江大庆163319 [2]黑龙江完达山良种奶牛场,黑龙江密山158308

出　　处：《畜牧与饲料科学》2015年第1期17-20,共4页Animal Husbandry and Feed Science

基　　金：黑龙江省农垦总局科技攻关项目(HNK125A-11-01-11);黑龙江省高等教育教学改革项目(JG2012010457)

摘　　要：为了解东北垦区规范化养殖牛场奶牛乳体细胞数的水平和分布情况,探析泌乳月份及乳成分与体细胞数之间的关系。利用统计分析软件SPSS 19.0中的GLM和Correlation过程,分析了2012—2013年黑龙江省某牛场的奶牛生产性能测定数据。结果表明,该牛场牛群平均乳体细胞数为14万/m L,有56.70%的奶牛个体乳体细胞数小于20万/m L,6月和10月乳体细胞数较高,10月乳房炎阳性率最高(27.25%)。体细胞数高于15万/m L时,就会造成经济损失,高于50万/m L的经济损失占牛群经济损失的71.45%。体细胞数与产奶量呈负相关,与乳蛋白率呈正相关。该试验结果可为更好地运用DHI体系评价奶牛的生产性能,规范牛群的饲养管理,有针对性地开展乳房炎防治工作提供参考。The objective of this study was to analyze the distribution of the somatic cell counts （SCC）and its correlation with lactation month and milk composition based on records of Dairy Herd Improvement （DHI）from 2012 to 2013 of a dairy farm in Heilongjiang province. The results showed that the total average SCC in raw milk was 140 000/mL,the ration of the dairy cows with SCC below 200 000/mL was 56.70 %. SCC was higher in June and August, and the positive rate of mastitis reached the highest value of 27.25% in October. It would produce loss when the SCC was higher than 150 000/mL in this dairy farm, and the economic losses caused by the cattle with SCC higher than 500 000/mL accounting for 71.45% of the total economic losses. SCC was negatively correlated with milk yield and was positively associated with milk protein. The results obtained in this study will provide scientific evidences for the better using of DHI evaluation system to regulate feeding management and prevent mastitis.

关 键 词：规模牛场 体细胞数 乳房炎 乳成分 奶牛群体改良 

分 类 号：S823.912[农业科学—畜牧学]