Efficiency of combined fodder use with reduced amount of grain in feeding lactating cows

摘要

The assessment of the need to include combined fodder with reduced amount of grain in the diet of dairy cows by replacing it with non-grain components (wheat bran, protected fodder fat) is given. In the scientific and economic experiment on 2 groups of cows 12 heads each, the influence of combined fodder with 40% of grain components by weight on the palatability of feed, milk yield, milk composition, nutrients' digestion coefficients, biochemical blood composition, level of milk production profitability was studied. Reducing the proportion of grain to 40% in the total number of concentrate's components allows to increase 4% fat milk yield by 0.8% while increasing the amount of fat and protein by 0.02 — 0.04%. The preference for consumption per 1 kg of 4% fat milk was in the experimental group - 8.67 MJ ME; 337 g of combined fodder. Reduction of grain in the combined fodder composition contributed to an increase in profitability by 12.3%.