园香鸡父母代种鸡产蛋率与累计产蛋数曲线拟合分析

Analysis of Curve Fitting Between Laying Rate and Cumulative Egg Number of Yuanxiang Chicken Parent Generation

为探究园香鸡父母代种鸡在规模化养殖下的产蛋规律,试验测定了5 936只园香鸡父母代种鸡产蛋性能,分别采用伍德模型、分室模型和杨宁模型拟合其产蛋率曲线,使用Gompertz、Logistic和Bertalanffy模型拟合其累计产蛋数曲线,根据拟合程度R2选择最优模型。结果显示:园香鸡父母代种鸡产蛋率曲线以杨宁模型最优(R^(2)=0.992),其次是分室模型(R^(2)=0.968),伍德模型最差(R^(2)=0.230)。Bertalanffy模型拟合累计产蛋数曲线最优,R2为0.998,其预测累计产蛋数的拐点周龄为37.63周,拐点累计产蛋数为59.65个。研究表明,可以用杨宁模型来预测园香鸡父母代种鸡的产蛋率,用Bertalanffy模型来预测园香鸡父母代种鸡的累计产蛋数。

To explore the law of laying eggs of Yuanxiang chicken parent generation under scale production,the test determined the laying performance of 5936 Yuanxiang chicken parents generation,using the wood model,chamber model and Yang Ning model to fit the egg rate curve,using Gompertz,Logistic and Bertalanffy model to fit the cumulative production curve,and chose the optimal model according to the degree of fitting R2.The results showed that the egg yield curve of the parents was optimal by the Yang Ning model(R^(2)=0.992),followed by the partition model(R^(2)=0.968),and the Wood model was the worst(R^(2)=0.230).The Bertalanffy model had the best fitting degree of cumulative egg number cure(R^(2)=0.998).The predicted inflection point of cumulative egg production was 37.63 weeks,and the cumulative egg production at the inflection point was 59.65.The study indicated that the Yang Ning model could be used to predict the egg laying rate of the parental breeders and the Bertalanffy model to predictthe cumulative egg laying number of the parental breeders.