| 利用回归分析与最小二乘法对影响产奶量的因素进行校正的比较研究 |
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| 引用本文： | 白瑞景,孙少华,马亚宾.利用回归分析与最小二乘法对影响产奶量的因素进行校正的比较研究[J].中国农学通报,2010,26(6):5-9. |
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| 作者姓名： | 白瑞景 孙少华 马亚宾 |
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| 作者单位： | 1. 河北农业大学动物科技学院,河北保定,071000
2. 河北石家庄畜禽良种工作站DHI测定中心,石家庄,050000 |
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| 基金项目： | 河北省科技厅攻关项目 |
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| 摘 要： | 摘 要：为了校正产犊月份和胎次对产奶量的影响，提高选种的准确性，本文以河北双娃奶牛场815头中国荷斯坦奶牛DHI测定结果为材料，利用回归分析和最小二乘法，制订了不同产犊月份和胎次对产奶量的校正系数。并且对两种研究方法的优劣进行了比较研究。结果表明：两种方法对305天产奶量估计值与实际测定值之间均无显著差异，但利用最小二乘法得出的第一胎305天产奶量估计值与利用回归分析法得出的估计值之间差异显著（P=0.04<0.05），且1至4胎的最小二乘法估计值与实际测定值更为接近。
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| 关 键 词： | 苎麻 苎麻 野生种质 农艺性状 形态结构 理化性能 |
| 收稿时间： | 2009-11-09 |
| 修稿时间： | 2009-12-09 |
A Comparision Study on the Adjusting Coefficients Estimated by Regression Analysis and the Least Square Method for Milk Yield |
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| Bai Ruijing,Sun Shaohua,Ma YaBin.A Comparision Study on the Adjusting Coefficients Estimated by Regression Analysis and the Least Square Method for Milk Yield[J].Chinese Agricultural Science Bulletin,2010,26(6):5-9. |
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| Authors: | Bai Ruijing Sun Shaohua Ma YaBin |
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| Institution: | Bai Ruijing1,Sun Shaohua1,Ma YaBin2 (1Animal Science , Technology College,Agriculture University of HeBei,Baoding Hebei 071000,2Livestock , Poultry Breeding Station of Hebei,Dairy Herd Improvement Center,Shijiazhuang 050000) |
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| Abstract: | To improve the accuracy of breeding, the effects of calving monthes and lactations must be considered. This study is based on the milk yield records of 815 Chinese Holstein Dairy cattle from Hebei Shuangwa dairy farm. The adjusting coefficients of milk yield with calving monthes and lactations were investigated with the simple statistical polynomial regression analysis method and the least square method. Besides, a comparison study on the two different methods was carried out. Results shows that there was n... |
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| Keywords: | Chinese Holstein Dairy cattle milk yield regression analysis the least square analysis adjusting coefficient |
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