摘要
[目的]为了分析三江牛体尺与体重的相关性,[方法]测定了成年牛和犊牛共264头,采用SPSS 21.0分析软件对测定结果进行相关性分析。[结果]表明:三江牛成年公牛与成年母牛体重差异显著(P<0.05),公犊牛与母犊牛体重差异不显著。体斜长、胸围、体高、管围、十字部高均对体重产生极显著影响(P<0.01),对体重的相关系数分别为:0.891、0.921、0.892、0.785、0.612。通过对体重与体尺指标的回归分析,除十字部高的系数估计值未达显著水平(P>0.05)外,其他估计值都达到了极显著水平(P<0.01),[结论]得出了三江牛体尺指标对体重的最优回归方程:体重=-389.618+7.389管围+1.686胸围+1.254体斜长+0.894体高,模型决定系数达0.904。
In order to understand the correlation between body weight （BW） and body size indexes of Sanjiang cattle, a total of 264 samples of adult cow and calf were measured. The software of SPSS 21.0 was employed to conduct a correlation analysis for two index. Results showed that the body weight of a dult bulls and adult cow reached a significantly difference （P〈 0. 05）, while there were no significant difference between bull calves and female calves. The body slanting length （BSL）, heart girth （HG）, body height （BH）, cannon circumference （CC） and height at hip cross （HHC） had a significant effect on body weight （P〈0. 01）, and the correlation coefficient values were present at 0. 891, 0. 921, 0. 892, 0. 991, 0. 892, respectively. According to the results of regression analysis, in addition to the estimate values of correlation coefficient for height at hip cross was not significant （P〉0.05）, other body size indexes had reached a extremely significant level （P〈0.01）. We eventually concluded the optimal regression equa tion for body size indexes to weight of Sanjiang cattle：BW= -389. 618 ＋7. 389 CC ＋1. 686 HG ＋1. 254BSL ＋ 0. 894BH, and the model decision coefficient were 0. 904.
出处
《中国牛业科学》
2017年第1期14-17,共4页
China Cattle Science
基金
四川省2015年现代畜牧业发展资金项目
关键词
三江牛
体重
体尺性状
回归分析
Sanjiang cattle
body weight
body size indexes
regression analysis
