Effect of diets with different fractional protein content on physiological state and bull-calves efficiency

Y. Y. Kovalevskaya

Feeding bull-calves with diets with protein digestibility 60-63 % has a positive effect on oxidative-restoring processes in organism, that is proven by morphological and biochemical blood analysis. The total protein level in blood is increased by 4-5 %, urea level is decreased by 10-15 %. Diets with protein digestibility of 60-63 % allow to obtain average daily weight gains of 1049-1079 g at feed spends per 1 kg of weight gain of 8,2-8,4 forage units. Prime cost of 1 kg weight gain is decreased at 3-5 %, and profit is increased at 5-7 %.

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