三种杂交仔鹅的生长曲线拟合及在选配中的应用

Comparison on growth curve fitting of three crossbreed geese and its application

运用Logistic、Gompertz和Bertallanffy 3种非线性模型对莱扬莱扬白鹅(LYLYB,莱扬白鹅与莱扬白鹅杂交后代)、莱扬白鹅(LYB,莱茵鹅与扬州鹅的杂交后代)、莱莱扬白鹅(LLYB,莱茵鹅与莱扬白鹅杂交后代)3种杂交后代的体重和体尺进行生长曲线拟合与比较分析。结果表明,3种杂交仔鹅3种模型的拟合度均高达0.99以上,都能很好地拟合仔鹅生长过程,以Logistic模型拟合度最高,根据实际饲养资料确定Logistic模型是拟合仔鹅生长的最优模型;以此模型估计3种杂交仔鹅体重和体尺的最大值发现,莱莱扬白鹅的生长速度最快,体重和体尺的增长均快于莱扬莱扬白鹅、莱扬白鹅。

By using three kinds of nonlinear model of Logistic, Gompertz and Bertallanffy, three crossbreed geese （LYLYB, LYB, and LLYB） were fitted and comparatively analysed in terms of body weight and size of growth. The results showed that fitness of the three models were all above 0.99, and could well fit the process of growth. According to the results, the fitness of Logistic model was the highest. Consequently, Logistic model is the optimal model based on the actaul feeding data. To estimate the maximum data of the body weight and the size of growth in the light of the Logistic model, the growth rate of LLYB geese was the fastest, and the growth in weight and size was faster than that in the other two geese.