Stimulation of adaptogenesis in aberdeen-angus calves for improving productive qualities

Abstract

Regularities in forming protective and adaptive functions in the organism of imported beef cattle in the conditions of the Nizhny Novgorod region have been described by the morphological and biochemical profiles of blood, cellular and humoral factors of nonspecific resistance. It has been found that immunization of calves with biological preparations PS-6 and Prevention-N-E implements their bioresource potential of meat productivity. On the background of using the preparations, the pre-slaughter weight of the calves increased by 15.4 and 22.0 kg, the slaughter weight increased by 13.8 and 17.5 kg, and the weight of hot carcass increased by 9.9 and 19.6 kg. The veterinary and sanitary expertise has proven the good purity of beef.