| Yak Calving Interval and Calving Efficiency |
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| 作者姓名： | 王敏强 Li Pingli Bo Jialin |
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| 作者单位： | Wang Mingqiang（Lanzhou Institute of Animal Science, CAAS, 730050, Lanzhou, Gansu, P R China）
Li Pingli（Lanzhou Institute of Traditional Chinese Veterinary Medicine）
Bo Jialin（Lanzhou Institute of Animal Science, CAAS, 730050, Lanzhou, Gansu, P R China） |
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| 摘 要： |
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Yak Calving Interval and Calving Efficiency |
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| Wang Mingqiang,Li Pingli,Bo Jialin.Yak Calving Interval and Calving Efficiency[J].China Herbivores,2005(Z2):203-204. |
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| Authors: | Wang Mingqiang Li Pingli Bo Jialin |
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| Abstract: | The results of 439 times of calving interval(CI) from 161 yak cows showed that the average CI is 459(se=131)d. The CI with 3 to 6 calving numbers is 25～48 d shorter than that of 1 to 2 and above 7 calving numbers. Although slaughtering a great number of calves during the late September and early October do bring about relatively higher calving rate that is mos yak cowst can give 3,4,5 and 6calves during 4,5,6 and 7 years old respectively. This makes major calving months shift from April or May to June. |
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| Keywords: | yak cow calving number calving efficiency calving month |
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