A Study on Some Reproductive Parameters of Local X Friesian Upgraded Dairy Cows
M. A. Kadir
M. M. Rahman
The study was conducted at two dairy farms namely, Government Dairy Farm, Faridpur and Central Cattle Breeding Station, Savar, Dhaka to investigate the effect of age of first service, conception rate, age at first calving, birtgh weight of calves and calving intervals on some reproductive parameters of Local X Freisian upgraded Dairy cows. From the study, it was revealed that average age at first service was 29.21?1.11 months. Means of the conception rate of different cows were 63.00?16.73 for artificial insemination and 85.00?17.17 for natural services. Average age at first calving was 39.30?4.53 months. Mean birth weight of calves of the representative cross bred was 15.32?0.78 kg. Average calving interval was 438.60?33.90, 435.75?32.35 and 424.37?38.66 days for first, second and third lactation, respectively. It may be concluded that the reproductive characters of Local X Friesian upgraded dairy cows are moderately standard and can be reared under Bangladeshi condition.