A COMPARATIVE STUDY ON PHYSICAL AND CHEMICAL PROPERTIES OF DIFFERENT BULL SEMEN

Abstract

The experiment was conducted at Central Cattle Breeding and Dairy Farm, Savar, Dhaka on 97 breeding bulls for a period 90 days from February to April 2009 to find out the physical and chemical properties of different bull semen. Out of total 97 breeding bulls, 3 were pure Friesian (100%), 22 were Local×Friesian (50%), 26 were Local×Friesian (75%), 18 were Sahiwal×Friesian, 13 were Sahiwal, 4 were Local×Friesian×Sahiwal×Friesian, 2 were Red Chittagong and 9 were local breed. The semen of different crossbred and local breed was examined for ejaculate volume, color, density, PH, mass movement, motility percent, motility percent before freezing and motility percent after freezing. It was observed that the maximum average ejaculate was obtained from Sahiwal×Friesian (SL×F) and the mean value was 12.9 ml. However, the minimum average ejaculate was obtained from Local×Friesian×Friesian× Local× Friesian (L×F×F×L×F) and the mean value was 7.4 ml. The maximum average density was obtained from Local (L) 1858.4 (million/ml). The minimum average density was obtained from Local× Friesian×Local×Friesian×Friesian (L×F×L×F×F) and the mean value was 1286.6 (million/ml). The maximum average PH was obtained from 3 times Local×Friesian×Friesian (L×F)3×F and the mean value was 6.5. However, the minimum average PH was obtained from the remaining bulls and the mean value was 6.4. The maximum average motility was obtained from Local (L) and the mean value was 68.8%. However, the minimum average motility was obtained from Local×Friesian×Friesian (L×F×F) and the mean value was 63.7%. The maximum average motility before freezing was obtained from 3 times Loca×Friesian×Friesian (L×F)3×F as well as in case of Local (L) and the mean value was 63.6%. However the minimum average motility before freezing was obtained from two times Local×Friesian (L×F)2 and the mean value was 60.0%. The maximum average motility after freezing was obtained from Sahiwal×Sahiwal (SL×SL) and the mean value was 51.2%. The minimum average motility after freezing was obtained from Local (L) and the mean value was 46.6%.