12月龄短角牛体重与主要体尺指标的相关性分析

Correlation analysis between body weight and main body size indexes of 12-month-old shorhorn

中文关键词: 短角牛  体重  体尺指标  多元回归分析

英文关键词: shorhorn  body weight  major body measurements  multiple regression analysis.

中文摘要:

      本文旨在探究12月龄短角牛体重与主要体尺指标之间的相关性，构建多元回归方程，研究影响短角牛的主要体尺指标及月龄。选取12月龄公牛163头，母牛261头，共424头短角牛体重、体高、十字部高、体斜长、胸围的体尺数据，构建多元回归方程并分析其相关性。结果显示，体重与各体尺指标之间均呈现不同程度的相关性,12月龄短角公牛体重与体高、十字部高、体斜长、胸围呈极显著正相关，其中体重与胸围的相关性最大(r=0.902)。12月龄短角母牛的体重与体高、十字部高、体斜长、胸围之间均呈极显著正相关，其中与胸围相关性最大(r=0.823)。12月龄短角牛的体重与体高、十字部高、体斜长、胸围之间均呈极显著正相关，其中与胸围相关性最大(r=0.873)。根据构建的多元回归方程其相关系数r可知，12月龄短角牛的体重与体尺指标之间存在较强的回归关系，其中公牛的体高、十字部高、体斜长、胸围与体重的相关性高于母牛。

英文摘要:

      The purpose of this study was to explore the correlation between body weight and main body size indicators of 12-month-old shorthorn , construct multiple regression equation, and study the main body size indicators and month age affecting shorthorn . The body size data of 424 shorhorn , including 163 bulls and 261 cows at 12 months of age, including body weight, body height, cross height, body oblique length and chest circumference, were selected to construct multiple regression equation and analyze their correlation. The results showed that body weight was correlated with body height, cross height, oblique length and chest circumference of 12-month old short-horn bulls, and the correlation between body weight and chest circumference was the largest (r=0.902). Body weight was positively correlated with body height, cross height, body oblique length and chest girth, and the correlation with chest girth was the highest (r=0.823). The body weight of 12-month-old shorthorn was positively correlated with body height, cross height, body oblique length and chest girth, and the correlation with chest girth was the largest (r=0.873). According to the correlation coefficient r of the constructed multiple regression equation, there is a strong regression relationship between body weight and body size of 12-month-old shorthorn , and the correlation between body height, cross height, body diagonal length and chest circumference of bulls and body weight is higher than that of cows.