Yak Calving Interval and Calving Efficiency

2005Acta Scientiarum Naturalium Universitatis SunyatseniBiochemistry, Genetics and Molecular Biology被引 2

摘要

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.

引用本文（GB/T 7714）

王敏强. Yak Calving Interval and Calving Efficiency[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2005.

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