In this study, 20 Holstein cows were selected and divided into 4 groups. Selected heads were of similar weight (500 kg) and the same milk productivity. The first group was control; the rest three groups were experimental. Feed additives of plant origin were added to the main diet of animals of three experimental groups within 20 days. The animals of the first experimental group were fed with 100 g of dried crushed plant material per head per day; the second and third experimental groups were fed with 150 g and 200 g, respectively. Animals in the control group did not receive feed additives. Milk samples were taken in the morning on the 1st, 10th, 20th, 30th and 40th days of the main experimental period in order to evaluate the content of key milk indicators. The results have shown that feed additives of plant origin promote a significant increase in milk productivity of dairy cows, but do not have a significant effect on various milk quality indicators. The effect, capable of increasing milk production has been linked to the amount of feed additive inclusion in experimental groups, consequently it is advisable to add from 150 to 200 g per head per day.

Lashin Anton P., Maksimov Nikita I., Syrovatskiy Maksim V.

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