海兰褐蛋鸡早期生长模型的拟合与分析简

为了掌握海兰褐蛋鸡早期的生长发育规律，运用Gompertz、vonBertalanffy和Richards三种非线性模型对0～10周龄的海兰褐蛋鸡体重数据进行了拟合与分析。结果表明：三种模型均能很好地模拟海兰褐蛋鸡早期的生长过程，拟合度均在0．99以上，但vonBertalanffij模型拟合效果更好，此模型拟合的生长曲线拐点周龄为19．98周，拐点体重为2358．44g，最大周增重为159．94g／周。yonBertalanffy模型在模拟海兰褐蛋鸡早期生长状况方面为理想的数学模型，此研究结果可作为科学饲养该鸡种的重要参考。

Fitting and Analysis on Growth Model about Early Bodyweight of Hyline Brown Layers

In order to study the growth and development rules of Hyline Brown Layers, three nonlinear curves of Gompertz, von Bertalanffy and Richards model were used to fit and analysis the growth model in Hyline Brown Layers form 0 to 10 weeks old. The results showed that the early growth process of Hyline Brown Layers could be demonstrated very well by the three models, and all indexes of fitness were very high （more than 0.99）. But von Bertalanffy model was the besl model, because of its less bias of feed practice. The inflection age of growth was 19.98 weeks, and the bodyweight at the inflection age was 2358.44g, and a maximal growth rate was 159.94g/week on the growth curve. The von Bertalanffy model was the ideal model on the early growth of Hytine Brown Layers. The results could be used in feeding Hyline Brown Layers scientificaUy