黑龙江省某牧场奶牛乳汁体细胞数与乳脂率相关性的研究  

Study on the Correlation between Somatic Cell Count and Milk Fat Rate of Dairy Cows in a Pasture in Heilongjiang Province

作　　者：龙全梅 张天琦 王建发[1] Long Quanmei;Zhang Tianqi;Wang Jianfa(College of Animal Science and Technolgy,Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases,Daqing 163319)

机构地区：[1]黑龙江八一农垦大学动物科技学院/黑龙江省牛病防制重点实验室,大庆163319

出　　处：《黑龙江八一农垦大学学报》2022年第1期38-43,共6页journal of heilongjiang bayi agricultural university

基　　金：国家自然科学基金面上项目(31772698);国家自然科学基金青年基金项目(31402157)。

摘　　要：为了明确乳汁中的体细胞数对乳脂的影响,对黑龙江省某规模化牧场荷斯坦奶牛生产性能测定监测数据中乳汁体细胞数与乳脂的相关性进行了分析。结果表明:乳脂率,乳脂产量(产奶量×乳脂率)、产奶量与体细胞数的相关系数r值分别为0.1222、0.05073、-0.02918,P值分别为0.0004、0.1433、0.4000。乳脂率、乳脂产量、产奶量与体细胞数的显著不相关。体细胞数超过50万·mL^(-1)与体细胞数小于50万·mL^(-1)的样本相比乳脂率显著增加,P值为0.0061。研究提示当牧场管理良好,乳汁体细胞数平均水平较低时,体细胞数与乳脂率,乳脂产量、产奶量均不相关。In order to determine the effect of the number of somatic cells in milk on milk fat,the study between milk somatic cell count and milk fat rate in the monitoring data of Dairy Herd Improvement(DHI)in a large-scale pasture in Heilongjiang Province was analyzed.The results showed that the correlation coefficients of milk fat rate,milk fat yield(milk yield×milk fat rate),milk yield and somatic cell count were 0.1222,0.05073 and-0.02918,respectively,and the P values were 0.0004,0.1433 and 0.4000,respectively.Milk fat rate,milk fat yield and milk yield were not significantly correlated with somatic cell count.The milk fat rate of samples with a somatic cell count exceeding 500000·mL^(-1)was significantly increased compared to a sample with a somatic cell count less than 500000·mL^(-1),with a P value of 0.0061.This study suggested that when the pasture was well managed and the average level of milk somatic cell count was low,there was no correlation between somatic cell count and milk fat rate,milk fat yield and milk yield.

关 键 词：奶牛 生产性能测定 体细胞数 乳脂率 乳脂产量 

分 类 号：S815.4[农业科学—畜牧学]