Efficiency of feed additive "Promelact" introduction into the diet of black-and-white cows

The way to achieve food independence of the Russian Federation is the desire to increase breeding resources of domestic leading breeds of dairy cattle, increase productive capabilities of animals, which will increase the production of milk, and therefore, dairy products. At the same time, great attention should be paid to the organization of a full-fledged rational feeding of animals. The aim of the work was to determine the effectiveness of the use of the high-energy feed additive "Promelact" in the diets of black-and-white dairy cows in the conditions of the Streletskaya ES in the Orel region. The objects of the study were black-and-white cows. During the experiment, 3 groups of cows were formed, 10 heads in each group. The animals of the control group received only the basic diet used on the farm. The cows of the I experimental group were introduced with 100 ml of the feed additive "Promelact" per day 21 days before the planned calving individually, the animals of the II experimental group were introduced with 100 ml of fodder additive "Promelact" per day 21 days before calving and 28 days after calving. The introduction of the energy feed additive "Promelact" into the diets of cows had a positive effect on their milk productivity and the chemical composition of milk. The cows, which had feed additive "Promelact" in their diets, used nutrients more efficiently for milk synthesis. Milk yield for 305 days of lactation in animals of the II experimental group was 461.0 kg more than in the control, and the content of fat and protein was 43.7 kg and 36.8 kg, respectively. The introduction of the feed additive "Promelact" into the diet of cows and heifers during the studied periods will further reduce the amount of concentrates to 250-300 g per 1 liter of milk, while the digestibility of succulent and roughage will reach 85-90%.