The development of a method for lifetime assessment of the level of contamination of sheep slaughter products in the zone with the increased anthropogenic load

The process of migration of heavy metals from environmental objects into the organism of farm animals is of great interest to the scientific community. The purpose of this study was to examine the bioelectric potential of superficially localized biologically active centers (BP of SLBACs) in rams of the Romanov breed at 4, 6, 8, 10 months old, to determine the productive qualities and the level of contamination of the animal organism in the zones of the Orel region with the increased anthropogenic load. So, in animals of the 2nd experimental group with a higher by 3.86; 5.32; 4.61 and 3.88 μA average BP of SLBACs at the age of 4, 6, 8 and 10 months old, the absolute increase in live weight was 0.8; 0.4; and 0.35 kg larger relative to the control group, respectively. With a statistically significant increase in the BP of SLBACs, the average indicators of meat productivity at the age of animals of 6.8 and 10 months old were statistically significantly higher in the range from 3.6 to 6.4%, relative to the animals of the control group. The studies of the amount of contaminants in the liver, bone tissue and rib eye of the experimental rams showed that in animals with a low average BP of SLBACs, the content of lead, zinc, copper at the age of 4.6 and 8 months old was increased, but the values were within the maximum allowable concentration (MAC). By the age of 10 months old, the concentration of cadmium and copper in the products of slaughter of animals with low BP of SLBACs exceeded the MAC for the average content of cadmium in the liver - by 22.2%, in bone tissue - by 15.3%, in the rib eye - by 50%, relative to animals with high BP of SLBACs. A biochemical analysis of blood serum was carried out. The data obtained formed the basis of the developed method for assessment of the degree of accumulation of contaminants in vivo in the body of sheep.