摘要
[目的]为探究不同季节(月份)对西门塔尔牛冻融胚胎移植效果的影响。[方法]分析2015年10月—2017年8月在张掖和定西地区移植冻融胚胎143枚,其中春、夏、秋、冬分别移植36枚,58枚,45枚,4枚。[结果]在本试验条件下,春、夏、秋、冬的妊娠率分别是61.11%(22/36),72.41%(42/58),80.00%(36/45),25%(1/4);春、夏、秋、冬的流产率分别是31.82%(7/22),23.81%(10/42),30.55%(11/36),100%(1/1);经检验,组间差异极显著(P<0.01)。7月中旬,9月,10月妊娠率均在80%以上,4月和7月下旬均在60%左右,1月只有25%。[结论]在甘肃秋季是牛冻融胚胎移植较佳的季节。
[Objective] It was to explore the effects of different seasons(months), on the transplantation of frozen-thawed embryos of Simmental cattle in Gansu province. [Method] Analysis of 143 freeze-thaw embryos transferred in Zhangye and Dingxi from October 2015 to August 2017, including 36, 58, 45 and 4 embryos respectively in spring, summer, autumn and winter. [Result] The results showed that pregnancy rate in spring, summer, autumn and winter respectively was 61.11%(22/36), 72.41%(42/58), 80.00%(36/45), 25.00%(1/4); that abortion rate of cattle in spring, summer, autumn and winter respectively was 31.82%(7/22), 23.81%(10/42), 30.55%(11/36), 100%(1/1). Differences among groups were extremely significant by Chi-square testing(P< 0.01). Rate of pregnancy of the second ten-day period of July, September, October are all over 80%; that of April and the third ten-day period of July was about 60%; that of January was only 25%(1/4). [Conclusion]Autumn was better season for transplantation of frozen embryos in Gansu province.
引文
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