| 延边黄牛幼牛正常生长发育的曲线研究 |
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| 引用本文： | 李秀元,罗忠默,俞东哲,洪淳锡. 延边黄牛幼牛正常生长发育的曲线研究[J]. 延边大学农学学报, 1996, 0(1) |
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| 作者姓名： | 李秀元 罗忠默 俞东哲 洪淳锡 |
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| 作者单位： | 延边农科所，龙井市畜牧局 |
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| 摘 要： | 本研究是应用复合函数回归式，对延边黄牛０～２４个月龄体重、体尺的６６项实测资料计算平均值和上下限，求出其曲线回归式和各月龄理论值．其结果：公母牛体重平均值曲线与实测值之间的分别为２８６．５６、１７６．２４，拐点偏差为０．７、０．３个月龄，比应用计算的低５２１４．２３、４００７．０５．计算公、母牛２０项体尺资料的平均值和实测资料的的结果，除母牛胸宽平均值外都比应用计算结果低，与实测值的吻合度较好，并能克服二次回归式和布劳迪回归式所存在的缺点．
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| 关 键 词： | 延边黄牛；离回归平方和；拐点复合函数式；吻合度；上下限 |
A Study on the Growth and Development Curve of Yanbian Yong Cattle |
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| Li Xiuyuan et al. A Study on the Growth and Development Curve of Yanbian Yong Cattle[J]. Journal of Agricultural Science Yanbian University, 1996, 0(1) |
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| Authors: | Li Xiuyuan et al |
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| Affiliation: | Yanbian Institute of Agricultural Science |
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| Abstract: | Applying, the thesis studies curve regression formula of Yanbian cattle development for 0-24 months.The result showed the value between the average weight curve and actual measuring value were 286.56 and 176.24,the inflectional deviations were 0.7 and 0.3 months.They were lower than when fHe formula was applied for 5214.23 and 4007.05. The results of between the average value of 20 length cattle data and actual data,calculative result was lower than that applying except the average width of the bulls' chest.The goodness of fit with actual measuring value was good,and eliminated the defects of secondary and Blaudi regression formula. |
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| Keywords: | Yanbian cattle Regression quadratic sum Point of inflection Complex function formula Goodness of fit Upper and lower limit |
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