昆明犬不同采精年龄对精液品质的影响

Effect of Age on Semen Quality in Kunming Dog

如何提高现代警犬的繁殖能力是目前亟待解决的一个重要科学难题,其中起关键作用的一个限制因素是公犬精液质量差。在其他家畜的研究中发现,采精年龄对精液各方面品质均有较大影响,但相似研究在犬中还未见报道。本文以昆明犬为试验材料,研究了2~4岁、4~6岁、6~8岁、大于8岁4个年龄段对精液品质的影响。结果发现,不同采精年龄除对精液pH值无显著影响外,对采精量、精子活率、精子活力和精子密度4个精液质量指标均有显著影响（P〈0.01）。多重比较结果认为,公犬的最佳繁殖性能出现在4~6岁阶段,因此生产实践中可对该年龄阶段的个体重点利用。

The improvement of reproduction ability of modern dog was largely hindered by the low-quality of semen.Although many reports in farm animals showed that the age could significantly affect the semen quality,the corresponding studies have not been conducted by far,to our knowledge.In this study,we investigated the affection of four age groups（2-4 years,4-6 years,6-8 years,and 8 years） on the semen quality in Kunming dog.We found that different ages have significant effect on the ejaculate volume,sperm viability,sperm motility,and sperm concentration.In contrast,the semen pH value did not differ among different groups.The highest performance of semen quality appeared in the group of 4-6 years.