Productivity of some crossbred beef cattle in Tra Cu district, Tra Vinh province
The study was conducted at farmer households and farms in Tra Cu district, Tra Vinh province from November 2015 to November 2017 to determine the productivity of some groups of beef crossbred cattle. Total of 75 F1 crosses produced by artificial insemination using frozen semen of Red Angus, Red Brahman and Droughtmaster bulls with Sind hybrid cows, of which 15 F1 Red Angus, 30 F1 Red Brahman and 30 F1 Droughtmaster. The condition of livestock production in farmer households and farms in captivity or semi-grazing, additional feed was provided in the stalls. Nutritional requirement was balanced by Ranijhan 1997 and NRC 1989.The results showed that F1 Red Angus, F1 Droughtmaster and F1 Red Brahman crosses were able to grow well in the feeding and climatic conditions in Tra Cu, Tra Vinh. Specifically, physiological parameters were within normal physiological range; proportions of tick infection, routine morbidity and culling were low; survival rate was high of calves (From 92.86 to 96.55% from birth to 12 months); The growth rate was higher than that of Sindhi crossbred and reached the weight of 254.63 kg for F1 Red Angus; 244.31 kg for F1 Droughtmaster and 197.29 for F1 Red Brahman at 12 months old. Average daily gains from birth to 12 months of age were 640.54 gram/day for F1 Red Angus; 619.04 gram/day for F1 Droughtmaster and 492.02 gram/day for F1 Red Brahman.
