Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
권호 표지
DOI QR코드

DOI QR Code

Conception Rate of Pabna Cows and Heifers Bred Under Artificial Insemination and Natural Service

  • Howlader, M.M.R. (Bangladesh Livestock Research Institute) ;
  • Mian, M.F. (Bangladesh Livestock Research Institute) ;
  • Kamal, A.H.M. (Bangladesh Livestock Research Institute) ;
  • Prodhan, M.A.M. (Bangladesh Livestock Research Institute) ;
  • Rahman, M.F. (Bangladesh Livestock Research Institute)
  • Received : 1996.07.18
  • Accepted : 1997.03.17
  • Published : 1997.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

A study on the conception rate of 885 cows and heifers bred under artificial insemination (AI) and natural service was carried out at AI sub-centers. A high conception rate was observed at first service in all breeding methods. It was revealed that the conception rates in AI with liquid semen (LS) were found to be 25.08, 18.58, 12.69, and 2.48% after 1, 2, 3 and 4 services, respectively. Inseminations of cattle with frozen semen (FS) were found to achieve 42.15, 14.46, 5.85, and 2.46% conception rates after 1, 2, 3, and 4 services, respectively. In natural service, conception rates were found to be 62.45, 6.75, 5.91, and 4.64%, respectively, after 1, 2, 3, and 4 services. Insemination of cows and heifers at mid-cycle had significantly (p < 0.05) higher conception rate as compared to early and late cycles. The existing AI machineries and breeding management need to be improved to achieve higher conception rate of dairy cattle under AI.

Keywords