摘要
采用Gompertz、Logistic和Von Bertalanffy3种非线性模型对湖北黑头羊0~24月龄体重生长数据进行了分析和曲线拟合.结果表明,3种模型均能较好地拟合湖北黑头羊的生长曲线(R2>0.99),但不同性别湖北黑头羊的最优拟合模型不尽相同,其中公羊最佳拟合模型为Gompertz (R2=0.999 32),拐点月龄和拐点体重分别为6.21月龄和20.823 kg,Gompertz模型方程为W=56.604 9 e-2.885 1exp(-0.17051);母羊最佳拟合模型为Von Bertalanffy(R2=0.998 12),拐点月龄和拐点体重分别为4.17月龄和13.221 kg,Von Bertalanffy模型方程为W=44.619 3×(1-0.643 3 e-015751)3.
The growth curve of Hubei black-head goats from 0 to 24 months were fitted with three nonlinear models including Gompertz, Logistic and Von Bertalanffy. The results showed that the three growth curve models had good fitting for Hubei black-head goats (R2〉0.99). The optimal models of different sex were different. For rams, the Gompertz model fitted best (R2=0.999 32), with the growth turning points of 20.823 kg of body weight at 6.21 months of age. The Gompertz model equa- tion for rams was W=56.604 9 e-2.885 lexp (-0.170 5 t). For ewes, Von Bertalanffy model fitted best fitting (R2=0.998 12), with the growth turning points of 13.221 kg of body weight at 4.17 months of age. The Von Bertalanffy model equation for ewes was W=44.619 3×( 1-0.643 3e-0.1575t)3.
出处
《湖北农业科学》
北大核心
2014年第16期3859-3861,共3页
Hubei Agricultural Sciences
基金
动物胚胎工程及分子育种湖北省重点实验室专项(2012ZD110)
湖北省农业科技创新中心资助项目(2013-620-004-001)
关键词
湖北黑头羊
体重
生长曲线
模型
Hubei black-head goats
body weight
growth curve
model