Abstract:
Cattle are the main livestock species in Bangladesh having over 25 billion
population. Artificial insemination is mainly used for breeding. In the present
study, a total of 235 ejaculates from 26 bulls were analyzed to evaluate the
non-genetic factors of semen quality of bulls in the Central Cattle Breeding
and Dairy Farm (CCBDF). Among three age groups, adult bulls (72-96
months) produced the highest volume (11.65±0.37ml) and concentration
(1372.4±53.94) whereas mass and forward movement was higher in mature
(3.43±0.03) and adult (69.44±0.55) respectively. Bull having medium weight
(500-750 kg) produced more volume of semen (10.39±0.26ml) but
concentration and mass movement was higher in light (up to 500 kg) weight
group (1382.1±49.37 and 3.52±0.05) while forward movement recorded
higher in heavy weight group (69.72±0.55). Seasonal variation was not
significant in the study. Early matured (18-24 months) bulls produced more
volume (10.15±0.23ml) but late matured (24-36 months) bulls have more
concentration (1402.7±43.14), mass movement (3.46±0.04) and forward
movement (68.54±0.45). Thus the study showed that, adult bulls having the
body weight up to 500 kg (light) from late matured bulls will produce quality
semen in any season in terms of volume, concentration, mass and forward
movement.
Description:
A Thesis
Submitted to the Department of Animal Nutrition, Genetics and Breeding
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ANIMAL BREEDING AND GENETICS
