Efectiveness of growing simmental breed cares with diferent maintenance technologies.

The purpose of the work was to establish the features of meat productivity of Simmental breed bulls depending on the rearing technology: 1 - traditional technology used on farms (indoors); 2 - using feeding and final fattening. The rearing technology had a significant impact on the live weight of bull calves and the amount of gain at different age periods. The difference in live weight between groups I and II was: at 6 months – 11.2 kg (P > 0.99); at 14 months – 20.3 kg (P > 0.999); at 18 months – 43.9 kg (P > 0.999) in favor of bulls of the second experimental group. On average, by the age of one and a half years, bulls of group II were 43.9 kg heavier than their peers of group I. At 18 months of age, the digestibility coefficients in both groups were high, but in young animals of group II, the coefficients of fiber digestibility were 18.2 % and fat 17.9 % higher than in group I bulls. The best slaughter qualities were in bulls reared using fattening and final fattening. The bulls of group II compared to group I had heavier carcasses: at the age of 6 months by 7.4 kg, at 14 months by 14.5 kg, and at 18 months by 37.0 kg. The deposition of internal fat was relatively small and somewhat greater in bulls of group II. At the age of 14 months, the carcass weight of group II bulls was greater than group I by 6.74 %, and the pulp by 1.34 %. This difference persisted at 18 months. The type of feeding had a significant impact on bone strength. The load that caused bone fractures in volume-fed bulls averaged 1,477 kg, and with concentrated feeding, an average of 1,209 kg, or 18 % less.

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