江西农业大学学报2011,33(1)：0112-0116 http://xuebao.jxau.edu.cn Acta Agriculturae Universitatis Jiangxiensis E-mail:ndxb7775@sina.com 奶牛产奶量与乳成分的多元回归分析 张巧娥，吴学荣，马水鱼，邢燕 (宁夏大学农学院，宁夏银川750021) 摘要：通过SAS8.2软件分析了20头胎次相同、泌乳期相近荷斯坦泌乳牛产奶量与乳成分中乳蛋白质率、乳脂 率、干物质、体细胞数和乳中尿素氨的多元回归分析。结果表明：从产奶量与乳成分的单项指标回归分析表明， 产奶量与乳脂率、体细胞数和干物质含量呈显著性的负相关，而与乳蛋白率和乳中尿素氮差异不显著：从产奶 量与乳成分的多元回归分析表明，乳蛋白率、乳脂率和干物质含量对产奶量的影响高于体细胞数和乳中尿素 氮，同时乳蛋白率、乳脂率、体细胞数和乳中尿素氮与产奶量成反比。 关键词：产奶量：乳成分：多元回归分析：奶牛 中图分类号：S823.9*11.2文献标志码：A文章编号：1000-2286(2011)01-0112-05 Multiple Regression Analysis on Milk Yield and Milk Composition of Dairy Cow ZHANG Qiao-e,WU Xue-rong,MA Shui-yu,XING Yan (College of Agriculture,Ningxia University,Yinchuan 750021,China) Abstract:20 heads Holstein cattles of same matched plet and similar lactation period were selected.Mul- tiple regression analysis between milk yield and protein ratio in milk,fat ration in milk,dry matter content, somatic cell count and urea nitrogen in milk were analyzed in this study by SAS 8.2.The result showed that the corelation between milk yield and fat ration in milk,somatic cell count,and dry matter content was signifi- cantly negative,while milk yield had no significant corelation with protein ratio in milk and urea nitrogen in milk according to single index regression analysis between milk yield and milk components.The effects of pro- tein ratio in milk,fat ration in milk and dry matter content on milk yield were bigger than those of somatic cell count and urea nitrogen in milk,meanwhile,protein ratio in milk,fat ration in milk,somatic cell count and u- rea nitrogen in milk were inversely proportional to milk yield according to multiple regression analysis between milk yield and milk components. Key words:milk yield;milk composition;multiple regression analysis;dairy cow 乳品中的乳蛋白质、乳脂肪、干物质、体细胞数和乳中尿素氮是乳品质量考核的非常重要的指标。 高树新等0研究表明，奶牛产奶量与乳蛋白率、乳脂率呈极显著的负相关(P<0.01),乳蛋白率与乳脂 率呈极显著的正相关(P<0.01)。牛奶的蛋白质含量随体细胞数的升高而增加，两者呈显著正相关网。 而邱才英等)报道，牛奶体细胞数增加将引起奶牛产奶量下降，两者呈负相关，并且相关关系极其显 著。黄文明等0研究表明，日产奶量与乳中尿素氮值呈二次曲线相关，日产奶量在33.3kg时乳中尿 收稿日期：2010-09-10修回日期：2010-10-26 基金项目：公益性行业（农业）科研专项(yyz07-036)、宁夏教育厅项目(20090034)、宁夏自然科学基金资助项目 (nz1008)和宁夏大学农学院创新试验(20090016) 作者简介：张巧娥，女，副教授，博士，主要从事反刍动物营养研究，E-mail:hangqiaoe@163.com。江西农业大学学报 2011，33( 1) : 0112 － 0116 http: / /xuebao． jxau． edu． cn Acta Agriculturae Universitatis Jiangxiensis E － mail: ndxb7775@ sina． com 奶牛产奶量与乳成分的多元回归分析 张巧娥，吴学荣，马水鱼，邢 燕 ( 宁夏大学 农学院，宁夏 银川 750021) 摘要: 通过 SAS 8． 2 软件分析了 20 头胎次相同、泌乳期相近荷斯坦泌乳牛产奶量与乳成分中乳蛋白质率、乳脂 率、干物质、体细胞数和乳中尿素氮的多元回归分析。结果表明: 从产奶量与乳成分的单项指标回归分析表明， 产奶量与乳脂率、体细胞数和干物质含量呈显著性的负相关，而与乳蛋白率和乳中尿素氮差异不显著; 从产奶 量与乳成分的多元回归分析表明，乳蛋白率、乳脂率和干物质含量对产奶量的影响高于体细胞数和乳中尿素 氮，同时乳蛋白率、乳脂率、体细胞数和乳中尿素氮与产奶量成反比。 关键词: 产奶量; 乳成分; 多元回归分析; 奶牛 中图分类号: S823． 9 + 11． 2 文献标志码: A 文章编号: 1000 － 2286( 2011) 01 － 0112 － 05 Multiple Regression Analysis on Milk Yield and Milk Composition of Dairy Cow ZHANG Qiao-e，WU Xue-rong，MA Shui-yu，XING Yan ( College of Agriculture，Ningxia University，Yinchuan 750021，China) Abstract: 20 heads Holstein cattles of same matched plet and similar lactation period were selected． Mul￾tiple regression analysis between milk yield and protein ratio in milk，fat ration in milk，dry matter content， somatic cell count and urea nitrogen in milk were analyzed in this study by SAS 8． 2． The result showed that the corelation between milk yield and fat ration in milk，somatic cell count，and dry matter content was signifi￾cantly negative，while milk yield had no significant corelation with protein ratio in milk and urea nitrogen in milk according to single index regression analysis between milk yield and milk components． The effects of pro￾tein ratio in milk，fat ration in milk and dry matter content on milk yield were bigger than those of somatic cell count and urea nitrogen in milk，meanwhile，protein ratio in milk，fat ration in milk，somatic cell count and u￾rea nitrogen in milk were inversely proportional to milk yield according to multiple regression analysis between milk yield and milk components． Key words: milk yield; milk composition; multiple regression analysis; dairy cow 乳品中的乳蛋白质、乳脂肪、干物质、体细胞数和乳中尿素氮是乳品质量考核的非常重要的指标。 高树新等［1］研究表明，奶牛产奶量与乳蛋白率、乳脂率呈极显著的负相关( P ＜ 0． 01) ，乳蛋白率与乳脂 率呈极显著的正相关( P ＜ 0． 01) 。牛奶的蛋白质含量随体细胞数的升高而增加，两者呈显著正相关［2］。 而邱才英等［3］报道，牛奶体细胞数增加将引起奶牛产奶量下降，两者呈负相关，并且相关关系极其显 著。黄文明等［4］研究表明，日产奶量与乳中尿素氮值呈二次曲线相关，日产奶量在 33． 3 kg /d 时乳中尿 收稿日期: 2010 － 09 － 10 修回日期: 2010 － 10 － 26 基金项目: 公益性行业( 农业) 科研专项( nyhyzx07 － 036) 、宁夏教育厅项目( 20090034) 、宁夏自然科学基金资助项目 ( nz1008) 和宁夏大学农学院创新试验( 20090016) 作者简介: 张巧娥，女，副教授，博士，主要从事反刍动物营养研究，E － mail: zhangqiaoe@ 163． com