The use of fodder yeast in the transitional period of lactation as a factor for realization of the productive potential of cows

To realize the competitive advantages of the Orel region in milk production, it is important in short terms to develop and offer a scientifically-based program for the technological improvement of the production and processing of agricultural products, which will allow the region to take a worthy place in the food market. In relation to the dairy subcomplex, the solution of the problem lies in realizing the existing potential for productivity and enhancing the reproductive qualities by improving animal feeding. It is well-known that the transitional period is essential not only for the successful start of lactation, but also for the preservation of the normal physiological state of a cow. In this regard, it is relevant to develop feeding methods of the transitional period that increase milk production and improve reproductive qualities. According to the chemical composition and physicochemical properties of milk, cows of the first group (in their balanced ration the transitional period was introduced with the use of hydrolysis yeast as an additive), demonstrated significant superiority over the control group of the cows, in whose diet the transitional period was absent. In terms of dry basis, as well as nonfat milk solids, the cows of the experimental group exceeded the cows of the control group by 3.0 and 4.8%. For the rest of the indicators between the experimental and control cows, no significant differences were observed. The introduction of the transitional period with the inclusion of fodder yeast (1 kg per head per day) in the diet does not affect the physiological state of the animals. The dependence of the reproductive qualities of dairy cattle on the use of fodder yeast during the transitional period has been established. Thus, the service - period in the experimental group decreased by 15%, and the insemination index increased by 16.6%.