| 育成奶牛早期配种研究 |
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| 引用本文： | 米同国,张翠花.育成奶牛早期配种研究[J].中国牛业科学,1999,25(5):29-30. |
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| 作者姓名： | 米同国 张翠花 |
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| 作者单位： | [1]河北邯郸农业高等专科学校 [2]河北邯郸县畜牧水产局 |
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| 摘 要： | 选用８３头１４～１５月龄的育成母牛分成两组，试验１组选小以牛冷冻精液配种，试验２组对公牛不进行筛选，即用大、小型公牛的冷冻精液本性中。另选４６头１８月龄的母牛作为对照组，称其为晚配件，也行人工授精，所用公牛与试验２组相同。试验结果表明，早配的试验１组与晚配件相比投产月龄提前４．１个月／头，可提高乳牛终身产奶量，创造出显著的经济效益，每头可增收节支２３７３元，胎衣不下率减少２．３％，产活犊率提高３％
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| 关 键 词： | 育成奶牛 早期配种 产奶量 胎衣不下率 产活犊率 |
Studies on Earlier Mating of Heifer |
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| MI Tong guo ,ZHANG Zui hua ,HUANG Tian hui.Studies on Earlier Mating of Heifer[J].China Cattle Science,1999,25(5):29-30. |
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| Authors: | MI Tong guo ZHANG Zui hua HUANG Tian hui |
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| Institution: | MI Tong guo 1,ZHANG Zui hua 2,HUANG Tian hui 2 |
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| Abstract: | heifers at the age of 14 to 15 months were chosen and divided into two groups to conduct the earlier mating trial, heifers in group 1 were inseminated with frozen semen of small size bulls, heifers in group 2 were randomly inseminated without bull selection, 46 18-month-old heifers in control group were inseminated late than group 1 and 2 with the same bulls' semen used in group 2. The results indicated that the production age of earlier mating group 1 was 4.1 months earlier than control group, and increased lifetime milk production could create a significant benefits with average economic return of 2373 Yuan, the percentage of retained afterbirth decreased 2.3%, the calf surviving rate increased by 3%, and the cow utilization rate increased by 6% compared with control group. |
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| Keywords: | heifer earlier mating milk production percentage of retained afterbirth calf surviving rate |
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