那米鸡早期生长发育规律研究

Study on the Characteristics of the Early Growth and Development of Nami Chicken

【目的】研究那米鸡的生长发育规律。【方法】选用Gompertz、Logistic和Von Bertalanffy 3种常用的非线性曲线模型对那米鸡0~210日龄体质量进行了生长曲线拟合与分析。【结果】那米鸡体质量的累积生长曲线呈现"S"形,表明其生长发育正常;表现为60日龄之前生长速度较慢,60~120日龄阶段为该鸡的生长旺盛期,120日龄以后生长速度逐渐减缓。60日龄以前,公鸡、母鸡的体质量累积生长曲线基本一致,60日龄以后,公鸡生长速度明显快于母鸡。3种曲线模型均能较好的拟合公、母鸡的生长发育,拟合度均达0.99以上,其中Gompertz模型对公鸡的拟合值与实际值最为接近,Von Bertalanffy模型对母鸡的拟合值与实际值最接近,表明Gompertz模型对那米鸡公鸡体质量的拟合度更高(R~2=0.998),Von Bertalanffy模型对母鸡体质量的拟合度更高(R~2=1.000)。【结论】本研究揭示了那米鸡的生长发育规律,表明运用Gompertz和Von Bertalanffy模型对那米鸡进行生长曲线的拟合与分析是可行的,可为那米鸡的饲养管理及选育利用提供依据。

[Purposes]In order to study the growth and development characteristics of Nami chicken.[Methods]Three nonlinear curve model commonly used Gompertz,Logistic and Von Bertalanffy,were used to fit and analyze the weight of Nami chicken at the age of 0-210 days.[Results]The cumulative growth curve of Nami chicken showed“S”shape,indicating that its growth and development was normal.This curve showed that the growth rate was slow before 60 days of age,and fast at the age of 60 to 120 days,and slowed down gradually after 120 days of age.Before 60 days old,the accumulative growth weight of cocks and hens was basically the same,and after 60 days old,the growth rate of cocks was significantly faster than hens.The three curve models could well fit the growth and development of the cocks and hens,and the fitting degree was more than 0.99.The fitting value of Gompertz model to cocks was the closest to the actual value,and Von Bertalanffy model was the closest to the actual value of hens,which indicate that Gompertz model has higher fitting degree for the weight of cocks(R2=0.998)and Von Bertalanffy model has higher fitting degree for the weight of hens(R2=1.000).[Conclusion]This study reveals the characteristics of early growth and development of Nami chicken,which shows that it is feasible to fit and analyze the growth curve of Nami chicken by using Gompertz and Von Bertalanffy model.The results in this study can provide a basis for the feeding,management,breeding and utilization of Nami chicken.