Regulation of Exchange Energy in Diets and Its Influence at Productiveness of Young Cattle

Abstract

Researches on determination of energy of energy norm in diets of young calves of 1-6 months of age helped to determine that 1 month of age calves need the diet to contain 1,02 kg of dry substance and 212 MJ of exchange energy, the 2 months calves correspondingly - 1,26 and 23,5; 3 months - 2,2 and 25,6; 4 months - 2,9 and 31; 5 months - 3,28 and 34,2; 6 months - 3,76 and 37,6. Concentration of exchange energy in 1 kg of dry substance should be not lower than in first month 20,7 MJ, in the second it should lower to 19 MJ and by the end of period it should be 10 MJ. The given level of feeding let us get 832 g of gain at spends of 3,52 forage units per 1 kg on average within 6 months and decrease the prime cost of gain at 75 rubles compared to control groups.