Navrátil S, Forejtek P, Drybcák J, Pavlica J
Vet Med (Praha). 1981 Feb;26(2):75-83.
A yearlong evaluation of the semen volume, concentration and number of morphologically abnormal sperms of 1722 ejaculates from 53 boars of Large White, Duroc and Landrace breeds housed in one building was performed. Simultaneously, continuous registration of temperature and of the relative humidity of the sty climate was performed, and the cooling value and the air flow in the sty were determined. In the followed period also the conception rate of sows after the first insemination by semen of the studied set of boars was evaluated. In summer season, at the increased and high temperatures and the relative sty humidity and at the lower air flow, the lowest average volume of ejaculate, the highest average sperm concentration and the minimum average number of abnormal sperms were recorded. In winter season, from the microclimatic viewpoint characterized mainly by the optimum air temperature but by high relative humidity and by excessive air flow, the highest average ejaculate volume with a lower average sperm concentration and with a maximum occurrence of abnormal sperms was recorded. The parametric differences in ejaculate quality in summer and winter seasons were statistically significant, however, their variations did not exceed the spermiologic standard throughout the year. The found decrease in conception rate of sows after the first insemination by the semen of the followed set of breeding boars in warm months is obviously to be attributed to the sows or to the changes of other andrological criteria than those being subject of this study.
对一栋猪舍内53头大白猪、杜洛克猪和长白猪品种公猪的1722份射精样本进行了为期一年的精液量、浓度和形态异常精子数量评估。同时，持续记录猪舍内的温度和相对湿度，并测定猪舍的冷却值和气流。在随后的时间段内，还评估了用所研究公猪精液进行首次授精后母猪的受孕率。在夏季，温度升高且处于高温状态，猪舍相对湿度较高，气流较低，此时射精量的平均体积最低，精子浓度平均最高，异常精子的平均数量最少。在冬季，从微气候角度来看，主要特点是气温适宜，但相对湿度较高且气流过大，此时射精量的平均体积最高，精子浓度平均较低，异常精子出现的比例最大。夏季和冬季射精质量的参数差异具有统计学意义，然而，它们的变化全年未超过精液学标准。在温暖月份，用所研究种公猪精液进行首次授精后母猪受孕率下降，显然应归因于母猪或本研究未涉及的其他雄性生殖标准的变化。
