DYNAMICS OF SERUM PROTEIN CONTENT AND PRODUCTIVITY OF CHICKENS WITH DIFFERENT TONUS OF THE AUTONOMOUS NERVOUS SYSTEM

The main role in maintaining the functioning of the body, its growth, and its development belongs to protein. It is involved in the formation of the muscular skeleton and is s part of enzymes, neurotransmitters, hormones. The effect of the autonomic nervous system on total protein metabolism has not been sufficiently studied. It is known that the autonomic nervous system is a structure that is responsible for the homeostasis and stability of the whole organism. It participates in the regulation of the heart, endocrine and external secretion glands, gastrointestinal tract, excretory organs, and more. In our studies, it was found that in chickens of Cobb 500 strain with different tones of the autonomic nervous system during the growing period from the 35th to the 60th day, different contents of total protein, albumin, and globulins were observed and different body weights were recorded. Vagotonic chickens showed the lowest protein metabolism at the age of 35 and 45 days (P < 0.05–0.001) compared with sympathicotonics and normotonics, which tended to increase between 35 and 60 days of rearing compared with other groups of birds, where the studied protein fractions on the contrary decreased. Correlations between total protein, albumin, and bird body weight had a high linear relationship in all groups of chickens (P < 0.05–0.001) and a negative relationship between the 45th and 60th days of rearing in sympathicotonics and normotonics. In birds with a predominance of the parasympathetic tone of the autonomic nervous system, this correlation maintained its direction with high reliability (P < 0.05) between body weight and total protein on the 60th day of rearing