Effect of Season on Semen Quality of Crossbred (Karan Fries) Bulls

摘要

One hundred and fifty six ejaculates from eight Karan Fries (KF) bull were collected to study the effect of season (summer, rainy and winter) on semen quality parameters at Artificial Breeding Research Centre, NDRI, Karnal, India. The data was analysed using least square analysis. Season had no significant effect on ejaculate volume, mass activity, total sperm output and pH of the semen, whereas it had significant (P<0.05) effect on initial motility, non-eosinophilic count and acrosome integrity of sperms as well as highly significant (P<0.01) effect on HOST, sperm concentration, sperm abnormalities and osmolality of semen in KF bulls. The results clearly indicate that during summer season, the highest values of sperm abnormalities, pH and OSMOL and lowest values of IM, SPC, SPCE, LIVE, HOST and AI was observed. During winter season highest magnitude of MA, IM, SPC, SPCE, LIVE, HOST and AI and lowest value of VOL, sperm abnormalities, pH and OSMOL were observed in KF bulls. It was concluded that the semen qualities were optimal during winter, poor during summer and intermediate during rainy season