12月龄雷琼黄牛生长曲线拟合的比较分析

为研究雷琼黄牛的早期生长发育规律,试验测量了300头不同月龄雷琼黄牛的体重和体高等生长指标,以SPSS 21.0软件进行相关性分析,再分别利用Brody、Von Bertalanffy、Logistic和Gompertz四个模型对试验牛的体高、胸围、体斜长和体重进行了拟合分析。结果表明:12月龄雷琼黄牛体高(x_2)、腹围(x_3)、管围(x_4)与体重(y)的关系极显著(P<0.01),线性回归方程y=-224.205+0.915x_2+0.475x_3+15.235x_4在实际生产中具有重要的统计学意义。Logistic模型为12月龄雷琼黄牛体重拟合最佳模型,Von Bertalanffy模型为体斜长拟合最佳模型,这可为雷琼黄牛育种过程中早期生长性能的评估提供依据。

Comparative Analysis of Growth Curve Fitting of 12-month-old Leiqiong Yellow Cattles

In order to recognize the early growth performance of Leiqiong cattle,and construct a regression equation to facilitate body weight prediction based on body size,300 different growth stage Leiqiong cattle were used to detected the body weight and body size traits in this study.Then,SPSS 21.0 was used to carry out the correlation between body weight and body size trait,such as body height,oblique length,chest circumference,as well as for fitting analysis.The results showed that the 12-month-old Leiqiong Yellow cattle had a significant relationship between body height(x2),abdominal circumference(x3),tube circumference(x4)and body weight(y)(P<0.01).The linear regression equation y=-224.205+0.915x2+0.475x3+15.235x4 had important statistics significance in Leiqiong cattle production.The Logistic model was the best fit model for the weight of the 12-month-old Leiqiong cattle,and the Von Bertalanffy model was the best fit model for the body slant length.This could provide reliable scientific theoretical support for formulating the early breeding program of Leiqiong cattle.