| 不同模型拟合奶牛泌乳曲线的效果分析 |
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| 引用本文： | 程郁昕,胡春晖,田丰.不同模型拟合奶牛泌乳曲线的效果分析[J].中国奶牛,2010(4):24-26. |
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| 作者姓名： | 程郁昕 胡春晖 田丰 |
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| 作者单位： | 1. 安徽科技学院动物科学学院,凤阳,233100
2. 江苏省金陵种兔场,南京,211103 |
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| 基金项目： | 安徽省教育厅自然科学研究项目 |
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| 摘 要： | 收集921头荷斯坦牛1～5胎共2386胎次的第1～10泌乳月泌乳资料,选择Wood模型和多项式模型拟合奶牛泌乳曲线。结果,Wood模型对该奶牛群1～5胎(第1～10泌乳月)泌乳曲线的拟合精度R2偏低(0.8753～0.9791);剔除第1泌乳月,Wood模型拟合泌乳曲线(第2～10泌乳月)R2显著提高(0.8753～0.9791),拟合效果优秀。多项式模型对1～5胎(第1～10泌乳月)泌乳曲线进行拟合,R2都在0.90以上,拟合精度高,估计误差小。
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| 关 键 词： | Wood模型 多项式模型 泌乳曲线 拟合精度 |
Effects Analysis of Fitting Lactation Curve in Different Models |
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| Cheng Yuxin,Hu Chunhui,Tian Feng.Effects Analysis of Fitting Lactation Curve in Different Models[J].China Dairy Cattle,2010(4):24-26. |
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| Authors: | Cheng Yuxin Hu Chunhui Tian Feng |
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| Institution: | Cheng Yuxin1,Hu Chunhui2,Tian Feng1(1.Animal Science College,Anhui Science , Technology University,Fengyang 233100,2.Jiangsu Jinling Breed Rabbit Farm,Nanjing 211103) |
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| Abstract: | To analyze the effects on Holstein lactation curve of different models, the milk yield of 1-10 milk months of 921 Holstein cows（1- 5 parities）was collected, the Wood＇ s model and the polynomial model were elected to fit the lactation curve of Holstein cows. The results showed that W of the Wood model fitting the lactation curve（1-10 milk months） of Holstein cows at 1-5 parities was on the low side（0.2019-0.4989）. If the data of first milk month was eliminated, the W of the Wood＇s model fitting the lactation curve（2-10 milk months）were all obviously enhanced, ranged from 0.8753 to 0.9791, and the fitting effect of the Wood model was excellent. Fitting the lactation curve（1-10 milk months）of Holstein cows at 1-5 parities by the polynomial model, the R^2s were all above 0.90, the fitting accuracy was high, and the error was low. |
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| Keywords: | Wood＇ s model Polynomial mode Lactation curve R2 |
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