成年大足黑山羊体重与体尺通径分析及最优回归模型的建立  

A Research on Path Analysis and Optimum Regression Mode Between Body Weight and Body Size in the Adult DaZu Black Goats

作　　者：陈永军[1] 赵中权[1] 张家骅[1] 李周权[1] 成林[1] 王贤海 王建国 

机构地区：[1]西南大学动物科技学院,重庆北碚400715 [2]重庆市大足县畜牧局,重庆大足402360

出　　处：《草食家畜》2008年第3期71-74,共4页Grass-Feeding Livestock

基　　金：重庆市科委攻关项目(NO:8443)资助

摘　　要：运用SPSS14.0分析了成年大足黑山羊体尺与体重的相关关系、体尺对体重的直接和间接作用以及决定程度,最后建立了体重与体尺的最优回归模型。结果表明:胸宽和管围是影响公羊体重最主要的体尺指标,胸围是影响母羊体重最主要的体尺指标。公羊最优回归模型为:Y=19.630-0.940X6+4.346X7,母羊最优回归模型为:Y=-17.942+0.661X4。The SPSS was utilized in this article to separately analyze the correlation of body size and weight in the adult Dazu black goats, the direct and indirect influence of body size to body weight, and the decision degree of body size to body weight. Finally optimum regression mode was established about body weight and body size. The result was indicated： chest width and cannon circumference is the most significant factors that influenced the ram＇s body weight; the chest circumference is the most significant factor that influenced the ewe＇s body weight. The ram optimum regression equation was： Y=19.630- 0.940X6 ＋ 4.346X7, the ewe optimum regression equation was： Y= -17.942 ＋ 0.661X4.

关 键 词：大足黑山羊 体重 体尺 通径分析 回归模型 

分 类 号：S813.24[农业科学—畜牧学]