Efficacy of artificial insemination for Brahman herds imported from Australia by frozen semen of Blanc Blue Belge, Charolais and red Angus cows in M’drak district, Dak Lak province
Insemenation of imported Blanc Blue Belge (BBB), Charolais (CHA), Red Angus (RA) and Red Brahman (BRA) freezing semens in to Australian Red Brahman cows, rised and well adapted in M’Drak showed hight rate of successful pregnancy: 76.9%; 75.8%, 80.2% và 75.3% respectly. Only 13.1%; 6.0%; 14.8% cases of giving birth of crossed Blanc Blue Belge, Charolais and Red Angus calves need assisted in comparison with 14.7% cases of Brahman ´ Brahman; Rate of placental retention was in the range 5.9%; 8.0%; 15.5% in comparison 9.2% in case of BRA ´ BRA; Living caves along period from birth to taking of from mother was 92.8% - 95.3% and no cow was death at giving birth of calf. The average weigh of new born crossed caves F1 of BBB, F1 of CHA, F1 of RA were: 32.9 kg (p<0.01); 35.4 kg (p<0.01); 29.6 kg in comparison with 27.1 kg for BRA ´ BRA calf and the average body weigh this ones at age 6 months were 242.0 kg (p<0.01) (F1 BBB); 240.2 kg (p<0.01) (F1 Charolais); 226.0 kg (F1 Red Angus) vs 215.0 kg (BRA ´ BRA) showed hight efficiency of crossed with BBB, CHA, and RA in body weigh.
