新疆地区西门塔尔牛不同模型泌乳曲线拟合效果分析  

Analysis of Fitting Effect on Different Models of Lactation Curve for Simmental Cattle in Xinjiang

作　　者：马光辉[1] 张文龙[2] 黄锡霞[2] 葛建军[1] 张春红[1] 徐莉[1] 左热古力.热合曼 阿依提拉.麦提如则 帕尔哈提.木铁力甫 

机构地区：[1]新疆呼图壁种牛场,新疆呼图壁831203 [2]新疆农业大学,乌鲁木齐830052

出　　处：《新疆农业科学》2013年第10期1931-1936,1930,共7页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区科技计划项目(201230116-7);"十二五"国家科技支撑计划课题(2012BAD12B09);现代农业(奶牛)产业技术体系建设专项资金资助(CARS-37)

摘　　要：【目的】比较新疆地区西门塔尔牛不同模型泌乳曲线拟合效果【方法】应用Wood不完全伽玛函数模型、Nelder逆多项式模型和Wilmink模型等3个数学模型,对新疆呼图壁种牛场西门塔尔牛第一胎、第二胎、第三胎、第四胎、四胎以上以及所有胎次的泌乳曲线进行了拟合,通过SAS统计软件进行分析。【结果】利用Nelder逆多项式模型拟合泌乳曲线,其拟合精度为R^2=0.174 3~0.944 2;利用Wilmink模型拟合泌乳曲线,其拟合精度为R^2=0.921 1~0.942 0;利用Wood模型拟合西门塔尔牛的泌乳曲线,其拟合精度为R^2=0.9239~0.944 2。【结论】其中,Wood模型的拟合度最高,拟合效果最优,为新疆地区西门塔尔牛泌乳曲线的最佳拟合模型。[ Objective ] To compare the fitting effect of different models of lactation curve for Simmental cattle in Xinjiang. [ Method] This paper analyzed the lactation curve of Simmental cattle of the first, second, third, fourth, greater than four parities and all parities by fitting Wood incomplete gamma function model, Nelder inverse polynomial model and Wilmink model and by using the SAS statistical software. [ Result] The results show that the fitting accuracy （R2） of the Nelder inverse polynomial model ranged from 0. 174 3 to 0. 944 2; the fitting aeeuracy（R2） of the Wilmink model ranged from 0. 921 1 to 0. 942 0;the fitting accuracy （ R2 ） of the Wood model ranged from 0. 923 9 to 0. 944 2. [ Conclusion ] The fitting accuracy of Wood model was the highest, which was optimal to fit lactation curve of Simmental cattle in Xinjiang.

关 键 词：西门塔尔牛 泌乳曲线 拟合度 

分 类 号：S826[农业科学—畜牧学]