Study on the conception rate of different dairy cows under farming conditions in Chittagong area

Abstract

The present study was undertaken to investigate the breeds and age groups and conception rate of different dairy cows under commercial dairy farming in Chittagong, Bangladesh. Different cattle genotypes such as: Holstein-Friesian × Local, Sahiwal × Holstein-Friesian and Local breeds were found under studied farm. The data from 43 breeds were analysed. The percentage of the cows of Holstein × Local and Local was higher (50%) than the Sahiwal × Local (46.6%). The Holstein × Local breeds had more production life (up to 9 years) than Sahiwal × Local and Local breeds. The conception rate of Holstein × Local, Sahiwal × Local and Local were 60.37 3±25.68, 39.08±17.69, 86.1±19.66 respectively and differed significantly among the genotypes. The service per conception also differed significantly. The effect of age and genotypes after artificial insemination on conception rate and milk yield average was studied. Among the factors, Age and Breed had highest significant effect on conception rate. Housing system and the time interval of first heat sign to Artificial Insemination had no effect on conception rate