The efficiency of application of protein-vitamin-mineral concentrate ‘delta feeds’ in lactating cows’ rations

One of the factors constraining the increase in milk production of cows is the imbalance of rations. The purpose of the research was to study the effect of the protein-vitamin-mineral concentrate ‘Delta Feeds’ on milk productivity of cows and physical and chemical indicators of milk. Scientific and eco-nomic experiment was conducted in 2018 in Altai LLC of Altai Region of the Republic of Khakassia on first-calf heifers (40 heads) of Simmental breed. It was established that the use of protein-vitamin-mineral concentrate ‘Delta Feeds’ in the diets of lactating cows in the amount of 600 g per head a day as a part of the main diet instead of 20 % of own production concentrates had increased aver-age daily cow yield by 0.99 l (9.4 %) (P> 0.95), fat content by 0.07 %. In terms of basic fat content of milk and protein milk content, the use of concen-trate feed in the rations of experimental cows con-tributed to the increase in daily milk yield by 2.10 liters. Physical and chemical parameters of milk improved, lactose content increased by 0.09 %, the levelof urea returned to normal, the average num-ber of somatic cells decreased by 25.5 %. It was established that the enrichment of protein-vitamin-mineral concentrate of cow rations provided for the reduction in the cost of concentrated feed per unit of production by 24.4 g (9.4 %) and obtaining addi-tional profits from the sale of milk in the amount of 2 rubles. 15 kopecks per a head a day. Using protein-vitamin-mineral concentrate ‘Delta Feeds’ is rec-ommend for the diets of lactating cows to increase milk production and improve physical and chemical indicators of milk.