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 present study was conducted on 308 Sahiwal cows sired by 38 bulls spared over a period of 32 years (1981- 2012), maintained at instructional dairy farm and AICRP on cattle -Sahiwal (field unit) at G.B.P.U.A. & T., Pantnagar Uttarakhand and Chak Ganjaria Government Cattle Farm Lucknow, Uttar Pradesh. The overall least- square means for age at first calving (AFC), first calving interval (FC1) and first service period (FSP) were 1281.89 ± 15.57, 426.70 ± 8.53 and 140.85 ± 8.90 days, respectively. Significant effect of sire and farm was observed in all the reproductive traits, while season was found to non-significantly influencing the age at first calving, first calving interval and first service period. Period of calving had highly significant (P<0.01) effect on AFC whereas, effect period of calving was found to be non-significant on first calving interval and first service period. Based on present study, it may be concluded that the optimum genetic potential for reproduction traits in Sahiwal cattle may be exploited by following proper feeding, management practices and adopting strict diseases control measure throughout the year and season.
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