ВЛИЯНИЕ РАЗНОГО УРОВНЯ КОРМЛЕНИЯ С ПЕРВЫХ ДНЕЙ ЖИЗНИ ЧЕРНО-ПЕСТРЫХ БЫЧКОВ НА ИХ РОСТ И РАЗВИТИЕ

Abstract

The article presents data on the study of the comparative effect on the change of preslaughter live weight, absolute and relative indicators of internal organs and paired skin at different levels of feeding of black-and-white bulls in the dairy period. It was found that the bulls of the second group, who consumed 0,2 kg of dried kanyga and an increased amount of milk and compound feed from the first days of life, outperformed the peers of the control group, who received a traditional diet for the farm, by pre-slaughter live weight at 8 months by 18 and 31 kg, and at 18 – by 23 and 64., kg (P<0,001). At 8 months, the superiority of the bulls of the first group over the third one was by 19% in terms of heart weight, liver – 13%, spleen – 14% and stomach – 11%, and relative to the pre-slaughter live weight, their difference fluctuated at the level of 2-4%. Between the second and third groups of bulls, this indicator changed at the level of 1-5% in 18 months. The difference in the absolute mass of these organs at this age was, respectively, 24%, 23, 30 and 21%. Higher indicators of the mass, length, width and area of paired skins at slaughter at 8 and 18 months of age were noted in the bulls of the experimental groups, with a significant advantage in favor of the peers of the second group. The intensification of feeding calves with the use of dried kanyga in the dairy period significantly increases the pre-slaughter live weight, the development of internal organs and the paired skin, which contributes to an increase in the production of beef, offal and leather raw materials