浙东白鹅生长曲线及拟合分析

Analyze on Growth Curve Fitting of Zhejiang White Goose

运用Logistic、Gompertz和Von Bertalanffy 3种非线性模型对浙东白鹅0～8周龄的生长曲线进行分析及拟合比较。结果表明,浙东白鹅公、母鹅在3周龄前生长曲线基本一致,之后一直到8周龄公鹅明显高于母鹅;3种曲线模型拟合度均达到0.99以上,其中Gompertz曲线模型在拟合度和预测极限生长量拐点周龄和最大周增重等方面相对较好。进一步分析结果表明,浙东白鹅公鹅的拐点体重高于母鹅,拐点周龄性别间差异不大。本研究对不同性别浙东白鹅的生长模式及其对营养环境的需求进行了初步探讨,为开展浙东白鹅的规模化养殖提供参考。

The growth curves of Zhejiang White goose from 0 to 8 weeks old were analyzed and fitted with three kinds nonlinear model（Logistic,Gompertz,Von Bertalanffy）.The results showed that the males and females had the same growth state before 3 weeks old,and then the males got a higher growth rate than females until the end of the observation.The growth curves were appropriately fitted with three models（R2〉0.99）,but the best model fitted the growth curve of different goose population was different,in general,the Gompertz model had the best effect on fitting with the growth curves of goose,the forecasting results Gompertz model of the final weight,the inflection point week old,and maximal growth per week all were better than that of the other two models.Further analysis indicated that the parameters of fitting curves represent inflection point weight in males both were higher than those in females,there was no significant difference found in inflection point week old between males and females.This paper would provide the message for growth rules in different sexual of Zhejiang White goose,and their nutrient and environmental needs,and also provide guide for extensive raising Zhejiang White goose.