罗斯308祖代肉种鸡生长期性能监测和生长曲线拟合

选用从美国安伟捷公司引进的1日龄罗斯308祖代D系肉种鸡10 823只,监测其0~20周的生长性能和生活力性状,并采用Logistic、Gompertz和Von Bertalanffy 3种非线性数学模型对其生长曲线进行拟合。结果表明:罗斯308祖代D系肉种鸡在良好的饲养管理下生长发育正常、均匀度较高,死淘率低;3种数学模型均能很好地拟合罗斯祖代D系肉种鸡的生长曲线,拟合度均在0.98以上,比较拟合度、成熟体重、生长拐点、最大周增重等指标,以Von Bertalanffy方程的拟合效果为最佳。

Monitoring Performance and Modeling Growth Curve for Ross 308 Grandparent Stock at Growth Stage

A total of 10823 Ross 308 grandparent stock were used to monitor their growth performance and viability.Three mathematic models including Logistic,Gompertz and Von Bertalanffy were applied to fit the growth curve of Ross 308 grandparent stock.The results showed that Ross 308 grandparent stock well developed with higher body weight uniformity,lower mortality and culling rate under the good management.The growth curves could be fitted well with three non-linear models and degrees of fitting were more than 0.98.Compared the parameters of degree of fitting,matural body weight,growth inflexion and maximum weekly gain,Von Bertalanffy model was the best effect on fitting the growth curve.