Department of Animal Husbandry and Dairy Science, Marathwada Agricultural University, Parbhani - 431 402, India.
*Correspondence Address: Dr. K.R. Mitkari, Cattle Cross Breeding Project, Marathwada Agricultural University, Parbhani - 431402, India.
The data of 961 lactation records each of Deoni and Holstein Friesian × Deoni (HF × D) halfbreds spread over a period of 21 years were analysed to assess the influence of farm, season and period of calving on Service Period (SP) and Inter-calving Period (ICP). The least squares means (LSM) for SP and ICP in Deoni and HF × D half-bred cows were 254.40 ± 5.13 and 533.64 ± 5.21 days and 151.23 ± 4.91 and 433.12 ± 5.39 days, respectively. The farm showed highly significant (P<0.01) influence on SP in Deoni, while farm and period have highly significant (P<0.01) influence on SP in HF × D halfbreds. However, effect of season was not significant on SP in Deoni and HF × D halfbreds. Farm showed highly significant (P<0.01) effect on ICP in Deoni as well as HF × D halfbreds. The influence of period of calving was significant (P<0.05) in Deoni cattle and highly significant (P<0.01) in HF×D halfbreds. rhe effect of season of calving was non-significant on ICP in Deoni as well as HF × D halfbreds.
