Department of Animal Genetics, Breeding & Reproduction, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Liaoning Shenyang, PR China.
Department of Animal Genetics, Breeding & Reproduction, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Liaoning Shenyang, PR China.
J Equine Vet Sci. 2020 Apr;87:102928. doi: 10.1016/j.jevs.2020.102928. Epub 2020 Jan 10.
It is important to assess the reproductive efficiency and improve the reproductive management to promote the donkey population development. The overall foaling-related parameters of jennies under smallholder farm conditions in China were hardly under investigation. A cross-sectional survey of randomly selected 694 smallholder farms was conducted in 40 villages in the north, east, and south areas of Western Liaoning Province and Eastern Inner Mongolia Autonomous Region between March and July, 2017. Foaling-related parameters were assessed such as the mean age at first foaling, foaling rate and foaling interval during 2014-2017. Only two-thirds of the adult jennies foaled during the 3-year survey period and delivered a foal every 1.9 years. The mean age at first foaling was 45.3 months. The lowest incidence of foaling rate was in coincidence with the peak of foaling. The overall mean values for the foaling rate and foaling interval were 75% and 500.5 days, respectively. Significant changes of foaling rates before the age of 15 years and foaling intervals in the first 8 parities were not observed. The results indicate that the jennies could maintain relatively fine foaling-related parameters under smallholder farm conditions in northeast of China. However, the foaling rates hardly remained high during the whole breeding season represented a major loss to the donkey breeding.
评估繁殖效率并改善繁殖管理以促进驴种群的发展非常重要。中国小农条件下母驴的整体产驹相关参数几乎没有被调查过。2017 年 3 月至 7 月，在辽宁西北部和内蒙古东部的 40 个村庄，对随机选择的 694 个小农进行了横断面调查。评估了产驹相关参数，如首次产驹的平均年龄、2014-2017 年的产驹率和产驹间隔。只有三分之二的成年母驴在 3 年的调查期间产驹，每 1.9 年产一驹。首次产驹的平均年龄为 45.3 个月。产驹率最低的时期与产驹高峰期重合。产驹率和产驹间隔的总体平均值分别为 75%和 500.5 天。15 岁之前产驹率和前 8 胎产驹间隔没有明显变化。结果表明，在中国东北地区的小农条件下，母驴可以保持相对良好的产驹相关参数。然而，在整个繁殖季节产驹率几乎保持在较高水平，这对驴的繁殖造成了重大损失。
