EFFECT OF INTEGRATED FORAGE ADDITIVES VITEX RT IN COWS OF HOLSTEIN DURING THE TRANSITION PERIOD
Research presents information about the impact of complex feed additive Vitex RT on milk productivity and efficiency of its application. The research was conducted in 2017 in the Moscow region. For carrying out an experiment there was created two groups of Holstein breed cows of 10 heads in each one. The age, origin, lactation, daily milk yield and live weight of the pre-selected animals were considered. The article also states that feeding the preparation in a dose of 100 g per head a day dur- ing the transition period increases butterfat 18.0 %, converted into 4 % fat-corrected milk for cows in the period of improving milk yield at a comparatively equal concentrate cost per liter of milk, and also decreases the service period by 13 days. The fat content of milk in cows in the experimental group was 0.19 % higher. As a result of higher milk yield and fat content, the yield of milk fat was higher in the experimental group by 18.1 % (P ≤ 0.05). In the experimental group, 13.16 kg of milk protein was obtained per animal, which is 13.6 % more than in the control. The results obtained showed that inclusion of feed additives Vitex-RT into the cow diets contributed to increase of their milk yields, as well as of fat content in milk produced, the supple- ment increases profitability by 23.09 %. The calculation of the economic efficiency of using Vitex RT supplements showed that with an equal sale price, the cost price of 1 kg of milk from cows from the experimental group decreases by 1.56 rubles compared with the control group, which makes it possible to gain profits by 13592.80 rubles in the first 120 days of lactation. and increase the profitability of milk production.