荷斯坦牛胎间距的影响因素及月龄和胎间距的回归分析  

Regression Analysis of Month Age and Calving Interval of Holstein Cows

作　　者：梁小军 高慧兰 马吉锋 脱征军 王建东 温万 LIANG Xiao-jun;GAO Hui-lan;MA Ji-feng;TUO Zheng-jun;WANG Jian-dong;WEN Wan(Institute of Animal Sciences,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan 750105;Animal Disease Prevention Center of Yuanzhou District,Guyuan 756000;Laboratory of Dairy Herd Improvement,Yinchuan 750105)

机构地区：[1]宁夏农林科学院动物科学研究所,银川750105 [2]宁夏固原市原州区动物疾病预防中心,固原756000 [3]宁夏畜牧工作站,银川750105

出　　处：《中国奶牛》2018年第7期37-40,共4页China Dairy Cattle

基　　金：宁夏回族自治区农业育种专项--<优质高产奶牛选育>项目遗传育种课题(2013NYYZ0501)

摘　　要：为探索奶牛月龄和胎间距之间的相互关系,本研究用箱线图法剔除2011~2017年宁夏地区荷斯坦牛的DHI数据中的异常值,将余下的数据构建月龄和胎间距的回归模型。结果显示,月龄和产犊间隔的回归曲线为?y=370.54897+0.59148x,拟合度R^2为0.75,表明可以用月龄来预测胎间距。In order to explore the relationship between month age and calving interval, this study excluded the outliers in DHI data of Holstein dairy cows in Ningxia from 2011 to 2017, and using the remaining data to construct regression model. The results showed that the regression curve is： y= 370.54897 ＋0.59148 , the ft R2 is 0.75, indicating that fetal distance could be predicted by month age.

关 键 词：月龄 产犊间隔 箱线图 异常值 回归曲线 

分 类 号：S823.3[农业科学—畜牧学]