The effectiveness of carnage in feeding highly productive cows
Growing corn in the Urals, harvesting cornage and using highly productive cows in feeding is a promising direction of feed production. The higher nutritional value of cornage, compared with corn silage, makes it possible to compensate for more expensive purchased grain feeds in the rations of cows. In terms of energy, protein, starch content, cornage surpasses corn silage by 13.0; 21.5 and 96.5 %, respectively. The nutritional value of the cornage was 12.1 MJ of exchange energy per 1 kg of dry matter. The aim of the study was to determine the effectiveness of the use of cornage in the diets of cows. The inclusion of cornage in the rations of cows at the beginning of lactation allowed to reduce the share of expensive concentrated feeds from 49 % to 46 % in the structure of the diet. Milk yield and protein content in the milk of animals of the experimental group exceeded the control values by 9.8 and 2.0 %, respectively. The yield of milk fat and protein in milk for 100 days of lactation increased by 10.0 and 12.2 %, respectively. Reproduction indicators have improved - the yield of calves was 90 %, and the insemination index was 1.6. The inclusion of cornage in the diet allowed to reduce the cost of the daily ration and the cost of 1 kg of milk produced by 1.9 %. The profitability of milk production increased by 8.2 %.