| 奶牛外貌评分与产奶量相关性研究 |
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| 引用本文： | 马云,赵春平,昝林森.奶牛外貌评分与产奶量相关性研究[J].畜牧兽医杂志,2009,28(2):1-3. |
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| 作者姓名： | 马云 赵春平 昝林森 |
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| 作者单位： | 西北农林科技大学动物科技学院,陕西,杨凌,712100 |
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| 基金项目： | 国家科技支撑计划奶业重大专项基金，农业部科技跨越计划 |
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| 摘 要： | 某奶牛场随机取30头奶牛，测定其305d产奶量及10个体型外貌评分性状，计算产奶量与体型性状之间的相关系数，求得产奶量的各自通径系数，研究奶牛10个体型性状与生产效率性状之间的关系。结果表明，整体评分与305d产奶量之间存在弱正相关（P〉0．05）；10个评分性状中，后乳房高度和宽度与305d产奶量呈极显著相关（P〈0．01）。乳房中隔和乳房深度与305d产奶量呈显著相关（P〈0．05）。整体外貌评分、后乳房宽度、乳房中隔越高则产奶量也越高，后乳房高度和乳房中隔是对产奶量起主要作用的性状。
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| 关 键 词： | 中小型 奶牛 体型外貌评分 产奶量 相关分析 |
Study on association between cow comformation scores and yields |
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| MA Yun,ZHAO Chun-ping,ZAN Lin-sen.Study on association between cow comformation scores and yields[J].Journal of Animal Science and Veterinary Medicine,2009,28(2):1-3. |
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| Authors: | MA Yun ZHAO Chun-ping ZAN Lin-sen |
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| Institution: | MA Yun, ZHAO Chun - ping, ZAN Lin - sen ( College of Animal Science, Northwest A＆F University, Yangling, Shaanxi 712100 China. ) |
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| Abstract: | Data for this study were collected from 30 dairy cattle in the third milk period. 10 conformation traits and 305 days＇ yields （Y） were measured and conformation scores were calculated. 305 days＇yields were used to make square distance set with relation coefficient. The correlation coefficients were calculated to study the relation of 10 conformation traits with 305 days＇yields. The results showed that the correlation coefficient between conformation scores and the 305 days＇yields was not significant （ r = 0. 1300, P 〉 0.05）. Hind udder height（ X6 ） and Hind udder width （ X7 ） gave predominant effects（ r1 = - 0.7638 ; r2 = 0.6968 ; P 〈 0.01 ）. Sept - udder（xs ） and Depth udder（ x9 ） gave significantly different（ r1 = 0.2733 ; r2 = - 0.2967, P 〈 0.05） . We can see that the milk cow production is height with the progress of whole outward appearance grade point and Hind udder width and Sept - udder. The milk cow produce is height with the lose of Hind udder height and Udder depth . It has an important effect to the milk cow produce by Hind udder height and Sept -udder. |
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| Keywords: | Small medium Cow Conformation score Milk yield Correlation analysis |
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