Biochemical blood indicators of meat cross turkeys during the growth period

The aim of the study was to investigate the features of changes in biochemical parameters of blood of meat turkeys in early postnatal ontogenesis. The studies were conducted at the Federal State Budgetary Educational Institution of Higher Education, the State Agrarian University of the Northern Trans-Urals. The objects of the study were blood serum from Hybrid Converter novo meat cross turkeys aged 1; 21; 59 days, 20 samples from each age. Analysis of biochemical parameters of blood allows us to determine the morphofunctional state of the body, including the functioning of the kidneys, liver, and intestines. At the age of 21 days, there was an increase in most of the studied parameters, but the creatinine level sharply decreased by 1.95 times, and by the 59th day there was a sharp increase in the creatinine level to (38.95 ± 3.06) μmol/L, which indicates an active increase in muscle mass. The dynamic increase in blood protein levels, as well as the decrease in triglycerides and alkaline phosphatase by the age of 59 days in-dicate the growth, development and functional formation of the digestive system. The level of urea de-creases with age, and by the 59th day it decreased by 56.43 % compared to the age of 1 day, which indi-cates the intensive work of the organs to transform protein synthesis products and remove them by the kidneys. The level of enzymes AST, ALT and GGT increased within physiological limits, which directly de-pends on the secretory or adsorption capacity of hepatocytes of the liver of birds. For the reliability of the obtained results, the calculation of the ratio of aminotransferases showed an increase by the 21st day of the bird by 43.3 % more compared to daily turkey poults, since intensive development of the organism oc-curs in this age period. The activity of lactate dehydrogenase (LDH) in turkey poults in the studied age as-pects shows that the level of LDH decreased with age.