FACTORS INFLUENCING CONCEPTION RATE OF LOCAL AND CROSSBRED COWS IN PANCHAGARH DISTRICT OF BANGLADESH

Abstract

The present study was conducted for a period of 6 months with 375 cattle (cows 278 and heifers 97) of five genotypes at sub-center (Artificial insemination) of Upazila Livestock Office, Boda, Panchgarh of Bangladesh to evaluate the effects of different factors on conception rate. The experimental animals were inseminated artificially using the semen from four genotype of bull. The overall feeding and management of the animals kept by the farmers was almost similar. Effect of the factors like genotype of cow, age of cow, milching or not, used for draught or not, genotype of bull, efficiency of inseminator, site of insemination and time of insemination on conception rate were determined. It was observed that conception rate of the cows were significantly affected by the time of insemination (P<0.01), site of insemination (P<0.01), inseminator (P<0.05) and age of cow (P<0.05). On the contrary, there were no significant (P>0.05) effects on conception rate by genotype of cow, milching or not, used for draught or not and genotype of bull. The highest conception rate was observed in the indigenous local cows (46.64%) of 5 years old (51.63%) which were inseminated in the site of deep cervix (58.43%) with the semen of LocalxHolstein-Friesian (F3) bull (47.00%) by experience inseminator (54.26%) at 10-13 hours (52.34%) after onset of estrus and cows in milching (45.32%) non-draught (53.62%) condition. It was concluded that the age of cow, time of insemination, site of insemination and inseminator were the most important factors to get maximum conception rate of the cows. So, it may be suggested that to achieve the desire rate of conception, the farmers should inseminated their cows in the site of deep cervix by technically sound and skilled inseminator at 10-13 hours after onset of estrus.