黑白花奶牛体尺性状与产奶量之间的多元分析

 本文据119头初产母牛的产奶性能、体高、体长、胸围及体重资料,用微机作了产奶量与体尺性状间的多元回归分析,并建立了体尺性状及体重与产奶量之间的多元回归方程。经F检验,该回归方程极显著。其中,胸围与产奶量之间的关系最为密切,其次是体长和体高;产奶量与体重之间存在极微弱的负相关。作者还分析了该牛群体型方面存在的一些问题,并提出了今后育种工作中应采取的措施。

Multivariate Statistical Analysis Between Constructional Characters and Milk Yield of Black-White Dairy Cows Ⅰ. Multiple Linear Regression Analysis of Height at Withers, Body Length, Heart Girth and Body Weight Related to Milk Yield of First Calvers

Multiple linear regression analysis of height at withers, body length, heart girth and body weight related to yield is applied to 119 first calvers. The multiple regression equation by F-test has great singnificance. Of the constructional characters concerned, heart girth is the most important one affecting milk yield, followed by body length and height at withers. There is a quite low negative relationship between body weight and milk yield. The authors suggest that breeders should give more consideration tc the constructional characters with essential effects on milk yield.