Milk yield and metabolic processes in cows during the usage of the biosprint drug in the diet structure

In recent years, a significant part of milk has been produced in farms of various organizational forms, mainly using feeds of their own production. At the same time, there are a number of problems, the solution of which affects the yield, quality and value of products, as well as future prospects in this industry. Scientific research has shown that the intensification of such an industry as dairy farming first of all depends on a strong forage base of the farm. In addition, lactating cows do not need generic feed, but a diet balanced in compliance with detailed rules. Their use makes it possible to increase milk yield by 20 and more percent. Therefore, when organizing a comprehensive feeding, it is necessary to take into account the features of protein, carbohydrate, lipid, mineral and vitamin nutrition. However, even a fully balanced ration does not guarantee the desired effectiveness. In this regard, a variety of feed additives of a natural substance, which also include supplements with probiotic action, deserve a special attention in the system of nutrition. One of these is the Biosprint microbial additive, which contains living yeast cultures (Saccharomyces cerevisiae, MUCL strain, 39885) and belongs to the group of biotic additives. This research is based on the need for the optimization of the limited feeding of milk cows through the use of the Biosprint feed additive in addition to a semi-concentrated type of feeding. Based on the conducted test use (90 days), it is necessary to determine the additive’s effect on the rumen digestion processes, milk yield and qualitative indicators of milk and to determine its optimal content in the diet. It was established that feeding the Biosprint additive as part of the diet contributed to the improvement of the intensity of metabolic processes in cows, in particular, in the rumen. The assumed growth of the number of amylo- and cellulolytic and proteolytic bacteria was detected, which contributed to their enzyme activity and, in turn, led to an intensive hydrolysis of carbohydrate feeds, as a result of which an assumed growth of VFAs as milk fat precursors occurred. Positive results were obtained in terms of the value of milk yield of cows in study groups in comparison with the control group across average daily milk yield by 1.2–2 kg, which constitutes a growth of 5.5–9.2%.There was a stable tendency towards an increase of fat content in milk by 0.05–0.1% and protein by 0.02–0.03%, which indicates an improvement in milk quality. Summing up, conducted study focused on the evaluation of the productive effect of the Biosprint drug on the milk yield of cows and the qualitative indicators of milk make a case for the expediency of the use of the above in the diet structure when feeding milk cows.