林肯杂交羊生长发育模型研究

Study on Growth Model of Filial-generation(Lincoln×Finewool sheep)

用Ｍｉｔｓｃｈｅｒｌｉｃｈ模型，Ｌｏｇｉｓｔｉｃ模型和Ｃｏｍｐｅｒｔｚ模型分别拟合林肯细毛杂种羊生长发育规律，其中以Ｃｏｍｐｅｒｔｚ模型拟合的Ｒ＾２最大，由Ｃｏｍｐｅｒｔｚ模型参数进一步估算出公羊和母羊两性别间其拐点体重分别为１６．６８和１７．６３ｋｇ，拐点日龄分别为１２１和１４５天；最大日增重分别为１１１．０和１００．７０ｇ／天，估算公母羊的最大体重分别为４７．９５ｋｇ和４５．３７ｋｇ。

compertz model,with the maximum R2among three nonlinear model(Logistic model,Mitscherlich model and Compertz model),was fitted with the growthof the filial一generation(LincoIn ×Finewool sheep).The goodness of the fit was 0.99for does and 0.95 for bucks.Meanwhile,the parameters of growth model wereobtained.The maximum body weight was 47.95 kg for does and 45.37 kg for bucks.Themaximum growthrate,0.20 for does and 0.17 for bucks, was at the age of 4 or 5months old.The maximum absolute growth was 111.0g/day for does and 100.70g/daybrbucks