Currently, it has been understudied which forms of feed supplements ensure the most positive effect on increasing milk nutritional value and processing properties. In this regard, an experiment was conducted on comparable groups of 90 cows. The animals of the 1st (control) group were fed compound feed concentrate that included the following ingredients: protected fat Megalac (3.1%); a buffering agent sodium bicarbonate (1.4%); protein digestion stimulator Farmatan TM (0.57%); mineral and vitamin premix Rindavit 51 ATG RV (3.6%). The animals of the 2nd (trial) group were given the following feed supplements: protected fat Nutracor (3.0%); a buffering agent Rumenbuffer (0.9%); protein-mineral-vitamin concentrate Cowfit 5 Plus (3.75%); mineral and vitamin premix Cowfit Immuno Fertil (0.75%). In the 2nd (trial) group, the levels of milk components increased as follows: lactose - by 20%; butterfat - by 15%; casein - by 25%; calcium - by 33%; phosphorus - by 53%; copper by 45%, zinc - by 89%; vitamin A - by 67%; vitamin E - by 30%; that was indicative of milk nutritional value increase.

Currently, it has been understudied which forms of feed supplements ensure the most positive effect onincreasing milk nutritional value and processing properties. In this regard, an experiment was conducted in comparable groups of 90 cows. The animals of the 1st (control) group were fed compound feed concentrate that included the following ingredients: a rumen-protected fatsupplementMegalac (3.1%); a buffering agent -sodium bicarbonate (1.4%); protein digestion stimulator Farmatan TM (0.57%); mineral and vitamin premixRindavit 51 ATG RV (3.6%); the animals of the 2nd (trial) group were giventhe following feed supplements: protected fat Nutracor (3.0%); a buffer-ing agent Rumenbuffer (0.9%); protein-mineral-vitamin concentrate Cowfit 5 Plus (3.75%); mineral and vitamin premix Cowfit Immuno Fertil(0.75%). In the 2nd (trial) group, the levels of milk components increased as follow-ing: lactose -by 20%; butterfat -by 15%; casein -by 25%; calcium -by 33%; phosphorus -by 53%; copper by 45%, zinc -by 89%; vitamin A -by 67%; vitamin E -by 30%; that was indicative of milk nutritional value increase