National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The objective of the study was to assess the effects of non-genetic factors such as farm, order of ejaculate, period, season of collection and age of the bull on semen quality traits of crossbred Holstein Friesian (CBHF) bulls. Data on a total of 22442 ejaculates from 72 CBHF bulls collected during the period from 1996 to 2014 were obtained from three organized farms in Tamil Nadu, India. The overall least-squares means for semen volume (SV), sperm concentration (SC), mass activity (MA), initial sperm motility (ISM), post-thaw motility (PTM) and number of doses per ejaculate were 4.53 ± 0.05 ml, 1081.33 ± 15.59 millions per ml, 2.54 ± 0.02, 70.00 ± 0.00 per cent, 52.48 ± 0.00 per cent and 221.82 ± 1.54 doses respectively. The fixed effects such as farm, period and age of the bull; and interaction of fixed effects of farm x season and age x season were highly significant (P<0.01) for all the semen quality traits. The order of ejaculate was highly significant (P<0.01) on PTM and number of doses per ejaculate. SC and ISM were significantly (P<0.01) higher during winter season. Based on the results, it could be concluded that farm I, first ejaculate, period-IV, winter season and 118 to 142 months of age, the CBHF bull produced comparatively best quality of semen.
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