麒麟鸡与怀乡鸡0~16周龄生长曲线的拟合分析

Fitting Analysis of Growth Curves of Frizzle Chicken and Huaixiang Chicken Aged 0-16 Weeks

【目的】麒麟鸡与怀乡鸡是产于粤西一带的优良地方品种,探索两个地方品种鸡早期的生长发育规律,为其资源保护和开发利用提供理论依据。【方法】通过测定麒麟鸡和怀乡鸡0~16周龄的体质量,采用Logistic、Gompertz和Bertalanffy 3种模型分别对其生长情况进行拟合分析。【结果】3种模型的拟合曲线拟合度均在0.979以上,其中对怀乡鸡的拟合度普遍优于麒麟鸡,Logistic模型的拟合度较差,而Bertalanffy模型对麒麟鸡和怀乡鸡的拟合度最高,且能更好地描述怀乡鸡的实际生长情况。Bertalanffy模型拟合的麒麟鸡和怀乡鸡拐点周龄分别为11.4周龄和5.8周龄,拐点体质量分别为894.1 g和498.7 g,所得到的麒麟鸡生长曲线方程为:Y=3017.521×[1-0.726exp(-0.068t)]3,怀乡鸡生长曲线方程为:Y=1683.001×[1-0.787exp(-0.147t)]3。【结论】Bertalanffy模型对麒麟鸡和怀乡鸡的生长曲线拟合较合适,通过生长发育规律的分析,获取了相应的生长曲线和关键参数,为两个地方品种鸡的资源保护、品种选育与产业化发展提供一定的科学依据。

【Objective】Frizzle chicken and Huaixiang chicken are excellent local breeds produced in the west of Guangdong.The early growth and development rules of the two local breeds of chickens are explored so as to provide a theoretical basis for the protection,development and utilization of their resources.【Method】By measuring the body weights of Frizzle chickens and Huaixiang chickens aged 0-16 weeks,Logistic,Gompertz and Bertalanffy models were used for fitting analysis of their growth.【Result】The fitting degree of the fitting curve of three models was above 0.979,and the fitting degree of Huaixiang chicken was generally better than that of Frizzle chicken;the fitting degree of Logistic model was poor,while the fitting degree of Bertalanffy model was the highest for Frizzle chicken and Huaixiang chicken,and it could better describe the actual growth situation of Huaixiang chicken.The ages of growth inflection point of Frizzle chicken and Huaixiang chicken fitted by Bertalanffy model were 11.4 weeks and 5.8 weeks respectively,and the weights of growth inflection point were 894.1 g and 498.7 g respectively.The growth curve equation of Frizzle chickens was as follows:Y=3017.521×[1-0.726exp(-0.068t)]3,and the growth curve equation of Huaixiang chickens was:Y=1683.001×[1-0.787exp(-0.147t)]3.【Conclusion】Bertalanffy model is suitable for the growth curve fitting of Frizzle chickens and Huaixiang chickens,and the corresponding growth curve and key parameters are obtained through the analysis of the growth and development rules,which provides a certain scientific basis for the resource protection,breed selection and industrial development of the two local chicken breeds.