Vol. 11, Special Issue 11 (2022)

Author(s):
Dr. Shrabanee Nayak, Dr. Gopal Chandra Das, Dr. Bula Das and Dr. Arundhati Phookan

Abstract:
The present study was conducted on 507 lactation records of Binjharpuri cows from different clusters in Jajpur district of Odisha covering 4 blocks. The data were first analysed by least-squares variance technique of fitting constants to estimate the mean performance and the effect of genetic and non-genetic factors on reproduction traits. The average age of Binjharpuri heifers at first calving was observed to be 1452.332±10.160 days. The least-squares mean and standard error are 115.061±1.106 days for service period, 281.296±0.193 days for gestation period, 396.357±1.088 days for calving interval. The location and lactation order had highly significant influence on service period, calving interval, age at first calving except gestation period. The season of calving had highly significant effect on service period, calving interval and non-significant influence on rest. The sex of calf had non-significant influence on all the reproduction traits.