| 用Wood模型拟合四川地区黑白花奶牛泌乳曲线的研究 |
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| 引用本文： | 赵智华,彭顺清,李凤翔,李启钰,杨雪梅. 用Wood模型拟合四川地区黑白花奶牛泌乳曲线的研究[J]. 四川畜牧兽医, 2000, 27(Z1): 19-20 |
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| 作者姓名： | 赵智华 彭顺清 李凤翔 李启钰 杨雪梅 |
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| 作者单位： | 四川畜牧兽医学院!重庆荣昌402460(赵智华，彭顺清，李凤翔)，重庆市永川畜牧中心(李启钰)，四川省渠县三汇中学(杨雪梅) |
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| 摘 要： | 用四川省阳坪种牛场 1 992年— 1 997年的黑白花奶牛共计 31 2个泌乳期的泌乳曲线 ,以研究胎次、产犊季节、干奶天数和初产年龄四个因素对模型参数估计值的影响。结果表明 :胎次的差异对参数a、b、c影响显著 ,对参数tmax影响不显著 ;产犊季节的差异对参数tmax影响显著 ,对参数a、b、c影响不显著 ;初产年龄的差异对参数a影响显著 ,对参数b、c、tmax影响不显著 ;干奶天数的差异对参数b、c、tmax影响显著 ,对参数a影响不显著 ;此外还给出了Wood模型拟合四川地区黑白花奶牛泌乳曲线的参数估计值
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| 关 键 词： | 泌乳曲线 数学模型 方差分析 奶牛 |
| 修稿时间： | 1999-09-05 |
A Study on Wood Model in fitting lactation curve in Dairy Cattle |
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| ZHAO Zhi hua ,LI Feng xiang ,PENG Shun qing LI Qi yu ,YANG Xue mei. A Study on Wood Model in fitting lactation curve in Dairy Cattle[J]. Sichuan Animal & Veterinary Sciences, 2000, 27(Z1): 19-20 |
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| Authors: | ZHAO Zhi hua LI Feng xiang PENG Shun qing LI Qi yu YANG Xue mei |
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| Affiliation: | ZHAO Zhi hua 1,LI Feng xiang 1,PENG Shun qing 1 LI Qi yu 2,YANG Xue mei 3 |
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| Abstract: | The lactation curve data of 312 Sichuan Holstein dairy cattle derived from Yangping cattle farm from 1992 to 1997 were used to fit Wood model in order to study the effect of fetus,born season,milk over days,and age in first fetus on the estimate values of the parameters a,b,c and t max of Wood model.The results showed that:the difference of fetus have the outstanding influence on a,b,c but not t max ,that of born-season on t max but not a,b,c;that of age in first fetus on a but not b,c,t max ,that of milk over days on b,c t max but not a.Moreover,the estimated values of a,b,c and t max of Wood model were given out for reference. |
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| Keywords: | lactation curve wood model dairy cattle |
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