EFFECT OF RUMENFIT COMPLEX ADDITIVES ON THE DYNAMICS OF LIVE WEIGHT OF MILK-PRODUCING COWS AND THEIR SUBSEQUENT MILK OUTPUT

Abstract

The foundation for a cow's future milk production is laid during the period of active growth and development of replacement heifers. Therefore, many scientists and specialists studying the productivity of modern dairy herds worldwide emphasize the need for a meticulous approach to feed selection and the technology (program) for raising heifers planned for subsequent integration into the main production herd. This article reflects the results of a scientific and business experiment conducted on a modern livestock complex over several years, using Holstein cows from birth to the end of their first lactation. The active phase of the experiment involved the formation of one control and two experimental groups of 10 animals each. Housing, microclimate, and care of the experimental animals were identical. The only difference was that from 2 to 6 months of age, heifers in experimental group 1 received the complex functional supplement Rumenfit 100 in their starter feed at a rate of 10 g per animal per day, while heifers in experimental group 2 received the complex functional supplement Rumenfit 50 at a rate of 5 g per animal per day. Growth and development indicators were monitored, blood tests were performed at 6 months of age, and subsequent reproductive performance was assessed. Finally, the milk productivity of first-calf heifers was assessed based on the milk production of the completed first lactation. A detailed analysis of this assessment is provided in this article.