贵州黄鸡慢羽系生长曲线拟合研究

试验旨在揭示贵州黄鸡慢羽系生长发育规律。选择100只贵州黄鸡慢羽系（公母鸡各50只），于0、2、4、6、8、10、12、14周龄末称重，分别采用Bertalanffy、Logistic、Gompertz 3种非线性生长曲线模型对贵州黄鸡慢羽系0~14周龄体重变化进行拟合分析。结果表明：3种模型均能很好地拟合其生长曲线，拟合度均在0.99以上，其中Logistic模型在贵州黄鸡慢羽系公鸡、母鸡生长曲线中拟合最好，拟合结果最接近实测体重情况，其公鸡拐点体重为1 550.81 g，拐点周龄为10.42，母鸡拐点体重为976.67 g，拐点周龄为9.14。试验结果初步揭示了贵州黄鸡慢羽系的生长发育规律和各阶段的生长特征，为贵州黄鸡慢羽系选育生产和产业化发展提供了科学依据。

Study on Growth Curve Fitting of Slow-feathering Line of Guizhou Yellow Chickens

The aim of this study was to reveal the growth and development law of the slow-feathering line of Guizhou Yellow chicken.100 chickens (50 males and 50 females) were selected randomly,and were weighed at the end of 0,2,4,6,8,10,12 and 14 weeks old.Three nonlinear growth curve models of Bertalanfy,Logistic and Gomperta were used in this experiment,and the body weight changes of Yellow chicken slow-feathering line at 0-14 weeks were analyzed by fitting.The results showed that the three models could all well fit the growth curve of Yellow chicken,and the R² were all above 0.99.Logistic model fitted the growth curve of both cock and hen best,and the fitting results were nearest to the measured values.The inflexion age was 10.42 weeks old,the inflexion weight was 1 550.81 g in the male,and the inflexion age was 9.14 weeks old,the inflexion weight was 976.67 g in the female.The results preliminarily revealed the growth and development regularity of slow-feathering line of Guizhou Yellow chickens,which could provide a scientific basis for breeding,production and industrialization development of slow-feathering line of Guizhou Yellow chickens.