Energy-protein Nutrition Optimization by Means of Local Sources of Protein in Diets of Cows after Milking

Abstract

Increase of vetch and new Natali sort in diets for cows in the general lactation cycle up to 20-25% promotes animals’ productiveness growth (counted for 4% milk) at 3,3-6,7% in winter period and at 3,0-7,8 - in summer period. In general during the experiment the milk yield increased at 3,2-7,0%. Increase of energy-protein correlation in diets of cows in experimental groups at 3,4 and 8,8% let us decrease the forage spends per 1 kg of 4%-milk at 5-8% in winter period and at 3,4-7,8 - in summer period. The greatest economic effect was obtained at implementation of 25% grain of vetch and increasing of protein level at 6 %: the net profit made 63120 rubles.