Abstract:
Artificial insemination (AI) was the first great biotechnology applied to
improve reproduction and genetics of farm animals. It has had an enormous
impact worldwide in many species, particularly in dairy cattle. To get more
meat, milk from dairy cow, AI play an important role to develop different
breeds across the country. This study was conducted from May 2018 to April
2019 at upazilla livestock office, Kaliakoir, Gazipur to determine the
effectiveness of Artificial insemination in cattle. A total of 150 cows were
selected to identify the potential risk factors such as breed, age, body condition
score (BCS) & season on conception rate. The study showed that overall
pregnancy rate was 55.33%, The highest pregnancy rate (59.52%) was
observed in Sahiwal cross, which was significantly (p<0.05) higher than that of
Friesian cross (47.92%) cows. Cows of 2< - <4 years of old revealed a
significantly (p<0.05) higher pregnancy rate (56.47%) than others. The higher
pregnancy rate (63.08%) in cows of BCS 3.5 than lower 2.5 BCS (29.17%)
cows showed significantly (p<0.05) higher pregnancy rate (71.05%) when AI
was done in spring (March-April) compared to winter (November-February)
calving cows (58.14%). Good BCS significantly enhances the pregnancy rate in
cattle. The study suggested that the spring (March-April) may be the best
season for good fertility of cattle in Bangladesh.
Description:
A Thesis
Submitted to the Faculty of Animal Science & Veterinary Medicine,
Sher-e-Bangla Agricultural University, Dhaka-1207,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ANIMAL SCIENCE
SEMESTER: JULY- DECEMBER, 2019
