GROWTH DYNAMICS AND INDICATORS OF FUNCTIONAL HOMEOSTASIS IN YOUNG CATTLE WHEN INTRODUCING A BIOCOMPLEX INTO THE DIET OF FREE L-AMINO ACIDS

Abstract

The most complete realization of the genetic potential is possible only in healthy animals with healthy offspring. At the same time, as practice shows, a significant part of newborn calves have various pathologies associated with genetically determined disorders, the procedure of calving, drinking the first portion of colostrum, etc. The situation is complicated by the fact that in the first weeks and months of life, due to violations of the technology of cultivation and management at the complex, calves show clinical signs associated with bacterial and viral damage to the body against a background of weak immunity. Therefore, the cultivation of healthy young animals is one of the most pressing problems in dairy farming. The effect of a biocomplex of free L-amino acids in the form of an aqueous amino acid solution NOMAR148-R on the dynamics of live weight and indicators of functional homeostasis of heifers of a black-and-white Holstein breed was studied. The positive effect of this feed additive on the dynamics of the average daily increase in live weight of calves up to 6 months of age, protein metabolism and indicators of functional homeostasis has been established, which is confirmed by the results of studying the activity of indicator enzymes of transamination.The use of water-amino acid solution NOMAR148-R in the rearing of young cattle under the age of 2 months contributes to an increase in the rate of absolute increase in live weight of calves by an average of 11.1 %, while the average daily increase increases by an average of 24.2 %; when using the feed additive «ZEO-AMINO» at the age of 2 to 4 months, an increase in the rate of absolute live weight gain was established by an average of 15.4 %, the average daily increase in heifers increased by an average of 13.3 %; at the age of 4 to 6 months, an increase in the rate of absolute live weight gain was established by an average of 17.2 %, the average daily increase in heifers increased by an average of 5.7 %. The study of the processes of growth and development of animals, the metabolism of proteins, carbohydrates and lipids, as well as the activity of indicator enzymes of transamination allows us to testify that the use of the feed supplement «ZEO-AMINO» in the cultivation of young cattle contributes to an increase in the use of feed proteins, activates a number of vital functions associated with the participation of globulins in the transport of lipids, including cholesterol, steroid hormones, vitamins, as well as the performance of transport and protective functions by globulins, being factors of specific and nonspecific immunity in the normal course of physiological processes and ensuring functional homeostasis.