| 奶牛头胎产奶量与初产期关系的探讨 |
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| 引用本文： | 曹竑.奶牛头胎产奶量与初产期关系的探讨[J].西北民族学院学报,1992(1). |
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| 作者姓名： | 曹竑 |
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| 摘 要： | 本文采用方差分析的理论与方法,对西安市草滩农场奶牛一场1980年到1987年青年母牛的初产期与产奶量进行了分析。结果表明,青年母牛初产期在790天以下与791天以上的第一胎产奶量有较大的差异。
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| 关 键 词： | 305天标准奶量 泌乳天数 青年母牛 初产期 |
Study on the Relationship Between the Milk Production of First Lactation and the First—calf Age of Dairy Cattle |
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| Cao Hong.Study on the Relationship Between the Milk Production of First Lactation and the First—calf Age of Dairy Cattle[J].Journal of Northwest Minorities University(Natural Science ),1992(1). |
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| Authors: | Cao Hong |
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| Abstract: | The relationship between the milk production of first lactation and the firstealf age of dairy cattle in Caotan cow farm Ⅰ in xian from 1980-1987 had been analysed statisically after the data had been sorted out, The results showed that there existed significant difference between the milk productions of first lactation of the dairy cattle of the first-calf age bef- ore 790 days and after 791 days |
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| Keywords: | Standard Milk Production Record 305 Days MilkiNg Days Heifer First—calf Age |
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