不同性别河北柴鸡早期生长规律及其生长曲线拟合

本研究运用Logistic、Gompertz和Bertalanffy三种非线性模型对不同性别河北柴鸡早期生长规律和生长曲线进行分析及拟合比较。结果表明,3种曲线模型拟合度均达到0.99以上,但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。进一步分析表明,河北柴鸡公鸡的极限体重和拐点体重均高于母鸡,拐点周龄性别间差异不大,公鸡最大周增重与实际观测值接近。本文有助于了解不同性别河北柴鸡各自的生长模式及其对营养、环境的需求,为开展规模化饲养提供参考。

Growth Rules of Different Sexual Hebei Chai Chickens in Early Growth Phase and its Growth Curve Fitting

In this research, the growth rule and growth curve of different sexual hebei chai chickens were analyzed in early growth phase and fitted with three kinds of nonlinear model, of logistic, gompertz, and bertalanffy, resepectively. The results showed that the indices of fitness of the three tested nonlinear models were up to 0.99 above, and gompertz model was considered to be the best model to fit growth curves ofHebei chai chickens because of the parameters of fitting curves which fitted with gompertz model representing the goodness of fit, the forecasting results 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 the final weight and 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, and the parameters of fitting curves representing maximal growth per week of males should be closed to the actual observed values. This paper would provide the message of growth rules in different sexual of Hebei chai chickens, and their nutrient and environmental needs, and also provide guide line for extensive raising Hebei chai chickens.