Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Ivelina ZAPRYANOVA
The aim of the study was to analyse the seasonal dynamics of some traits of semen production of Danish and English Landrace boars. The concentration of spermatozoa was the highest in spring (412.72±7.72x106/ml) and the lowest in summer (376.28±7.94x106/ml). The volume of the semen (274.38±8.76 ml), the total concentration of sperms, (101.07±2.58х109) and the number of insemination doses (16.89 ± 0.43) were the lowest in summer and the highest in winter (319.9±8.21 ml, 119.4±2.42х109 and 19.94±0.43, resp.). The boars’ race and the season of obtaining the ejaculates have a significant influence on the analysed semen traits. The Danish Landrace race surpass the English Landrace boars by all studied characteristics of semen production. The priority of the Danish Landrace in semen volume is between 3% and 19%, and in sperm concentration is between 1% and 14%. About the total concentration of sperms and the number of insemination doses, English Landrace boars give up with 29% during the different seasons.
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