董晶　杜炳旺　刘宜林　李艳青　陈运冬

摘要：【目的】探讨信宜怀乡鸡C品系（颈部有圈浅黄色羽毛）第3世代产蛋率和产蛋量的变化规律，为提高怀乡鸡产蛋性能提供科学参考。【方法】统计信宜怀乡鸡C品系第3世代19～52周龄的产蛋率和累计产蛋数，采用伍德、杨宁、分室和三次方程4种模型对产蛋率进行拟合分析，采用Logistic、Gompertz和Von Bertalanffy模型对累计产蛋数进行拟合分析，计算各模型的参数值和拟合度（R2）。【结果】杨宁模型R2最高（0.988），其次是分室模型（0.976），伍德模型和三次方程R2稍低，分别为0.833和0.733；Logistic、Gompertz和Von Bertalanffy 3种累计产蛋数模型R2分别为0.988、0.995和0.998；杨宁模型的最高产蛋率为73.85%，与实际观测值（73.66%）最接近；Von Bertalanffy模型的极限产蛋数为128.96，相对于Logistic和Gompertz模型（分别为125.56和127.88），与实际观测值（131.62）最接近。【结论】杨宁模型和Von Bertalanffy模型分别对信宜怀乡鸡C品系第3世代产蛋率和累计产蛋数拟合效果最佳，可用于信宜怀乡鸡产蛋规律的估计和预测。

关键词： 信宜怀乡鸡；产蛋率；累计产蛋数；曲线拟合

中图分类号： S831.2 文献标志码：A 文章编号：2095-1191（2017）01-0158-05

Abstract：【Objective】The present study investigated the change rule of laying rate and egg production of the third generation of Xinyi Huaixiang chicken C strain（light yellow feather circled around the neck），in order to provide scientific reference for improving laying performance of Huaixiang chicken. 【Method】Laying rate and total egg number of the third generation of Xinyi Huaixiang chicken C strain at 19-52 week age were collected. Four models， namely Wood，Yang-Ning， McMillan and cubic equation， were adopted to fitting analysis on laying rate； and Logistic，Von Bertalanffy and Compertz were employed in fitting analysis on total egg number. The parameters and fitting degree（R2） of these models were calculated. 【Result】R2 of Yang-Ning was the highest（0.988）， followed by McMillan（0.976），Wood（0.833） and cubic equation（0.733）. R2 of Logistic，Compertz and Von Bertalanffy for total egg number was 0.988，0.995 and 0.998 respectively. In Yang-Ning， the highest laying rate was 73.85%， which was the closest to the observed value（73.66%）. In Von Bertalanffy， the maximum egg production was 128.96， which was the closest to the observed value（131.62） compared to the values of Logistic（125.56） and Gompertz（127.88）. 【Conclusion】Yang-Ning and Von Bertalanffy have the optimum fitting effects on laying rate and total egg number of the third generation of Xinyi Huaixiang chicken C strain，which can be used for prediction of laying rate and egg production of Xinyi Huaixiang chickens.

Key words： Xinyi Huaixiang chicken； laying rate； total egg number； curve fitting

0 引言

【研究意義】产蛋曲线不仅能直观地表现出鸡群产蛋期产蛋率的变化规律，还可反映饲养管理水平状况，引导饲养者加料或减料，使鸡群在标准体重范围内健康生长。在实际生产中，种鸡的经济价值体现在生产期的产蛋总量。因此，从动态角度研究产蛋率和产蛋数随时间而变化的规律，并利用模型根据早期资料预测全年产蛋量，对家禽遗传育种、营养试验、生产管理和系统分析均具有重要意义。【前人研究进展】产蛋……