Features of adaptation and meat qualities of Aberdeen-Angus bulls on the background of immunostimulation

Abstract

The feasibility of using Prevention-N-E, a newly developed and tested biological product, in comparison with the previously tested PS-6 preparation in the adaptive technology of keeping specialized beef cattle of imported breeding, had been scientifically substantiated and experimentally proved. Against the background of the use of drugs in animals of the 1st and 2nd experimental groups, the incidence of the digestive and respiratory organs decreased by 1.4 and 2.3 times, the recovery time reduced by 3.36 and 4.88 days, accordingly, compared with the control (P <0.05). By the end of the growing period, the animals of the 1st and 2nd experimental groups exceeded in live weight control subjects by 6.6 and 9.2 kg, rearing by 10.4 and 14.8 kg, and fattening by 14.2 and 22.2 kg respectively. In the cuts of the carcasses of bulls of the 1st and 2nd experimental groups, there was a bigger amount of the highest grade flesh: in spin-breast – by 1.0 and 1.0 kg, in the lumbar – by 0.2 and 0.4 kg, and in the hip – by 2.3 and 4.2 kg, rather than in the control.

Analysis of the costs of feed production and fattening beef cattle using the example of a selected private farm

“…Knowing the weight of the carcass and the animal's pre-slaughter body weight we can calculate the dressing percentage. The dressing percentage rate is closely linked to: breed, sex of the animal, nutrition, pre-slaughter transportation and pre-slaughter handling conditions [Młynek and Guliński 2007, Albertí et al 2008, Litwińczuk et al 2013, Semenov et al 2019.…”

Meat Productivity of Bull Calves of Different Directions of Productivity Using Feeding Combined With Final Fattening

“…Depending on the fatness of the calves when they enter the pastures for five to six months of the grazing season, they can increase live weight by 120-140 kg [11]. Moreover, young Aberdeen-Angus calves respond well to immunostimulation with biological products of a new generation of domestic (Russian) production, due to this, adaptogenesis and quality of produced beef are increased [12,13].…”