辽育白牛胴体产肉量预测模型研究

Predicted Regression Model for Beef Carcass Yield of Liaoyu White Cattle

为了快速且准确的预测辽育白牛胴体产肉量,进而建立完善的胴体分级体系,本试验对60头辽育白牛进行屠宰胴体分割试验,分别测量了胴体重(X_1),第5肋侧厚度(X_2),第5~6肋眼肌宽高乘积(X_3),第5~6肋眼肌面积(X_4),第12肋侧厚度(X_5),第12~13肋眼肌宽高乘积(X_6),第12~13肋眼肌面积(X_7),肾脏油、心脏油和膈肌油之和(X_8),后腿围(X_9)和大腿肌肉厚(X_10)等与产肉量、产肉率相关的10项指标,利用SPSS 19.0软件对数据进行相关分析和线性回归分析。结果显示,X_1、X_8与产肉量和产肉率相关性最强,依此推导出2个可信度高、实践中方便应用的产肉量预测方程:1产肉量(眼肌宽高乘积)=0.809X_1+0.158X_6+0.857X_8-13.967(R^2=0.986);2产肉量(眼肌面积)=0.779X_1+0.318X_7+0.933X_8-17.779(R^2=0.990)。

To investigate the predicted regression model for beef carcass yield and percentage of Liaoyu White cattle,60 cattles were slaughtered and determined 10 indicators about beef carcass yield and percentage,including carcass weight（X1）,the 5th rib thickness（X2）,product of 5th to6 th rib eye width and height（X3）,5th to 6th rib eye area（X4）,the 12 th rib thickness（X5）,product of 12 th to 13 th rib eye width and height（X6）,12 th to 13 th rib eye area（X7）,the weight of kidney,heart and diaphragm fat（X8）,hind leg circumference（X9）and thigh muscle depth（X10）.Then correlation and regression analysis between 10 indicators and beef carcass yield and percentage were taken using SPSS 19.0.The results showed that the correlation were the highest between X1 and beef carcass yield,X8 and beef carcass yield percentage.Besides,there were two credible regression model for beef carcass yield of Liaoyu White cattle：1 Beef carcass yield（product of 12 th rib eye width and height）=0.809X1＋0.158X6 ＋0.857X8-13.967（R2=0.986）;2 Beef carcass yield（12th rib eye area）=0.779X1＋0.318X7＋0.933X8-17.779（R2=0.990）.