Studies on the Reproductive Performance of Jersey X Sahiwal Cows in Chittoor District of Andhra Pradesh
Journal Title: International Journal of Agricultural Sciences and Veterinary Medicine - Year 2013, Vol 1, Issue 1
Abstract
The effect of batch and season of birth was highly significant on age at sexual maturity. Cows born during rainy and winter seasons matured at significantly earlier age (750.18 ± 0.79 and 760.18 ± 0.18 days, respectively). The season of birth, batch and age at sexual maturity had non-significant influence on the gestation period. The overall mean gestation period was 276.89 ± 0.38 days. Age at first calving was significantly affected by season of birth, batch and age at sexual maturity. Lowest age at first calving (1092.46 ± 7.47) was observed in cows born in winter followed by those born in rainy (1134.88 ± 6.47) and summer (1173.95 ± 5.89) seasons. Mean age at first calving ranged from 911.60 ± 4.40 to 1378.37 ± 7.49 days in 1st and 4th groups, respectively. The calves with early sexual maturity (400 to 600 days) had the shortest age at first calving (911.60 ± 4.40 days).
Authors and Affiliations
Reddy Varaprasad A
Keywords
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