Biogeochemistry of Heavy Metals in Trophic Chain in Terms of the South of Tumen Region

The article considers biogeochemistry of heavy metals in the system soil-plant-animal in the terms of the south of Tumen region. The results of researches showed that soils are impoverished by the active forms of zinc. Its average content in the soils was 0.62mg/kg that is below normal for the provision of all group of plants. The regions with relatively high content of lead and cadmium (in comparison with other regions) were revealed. Crop cultures grown in Tumen region correspond to the ecological and sanitary-hygienic standards of heavy metal content. Accumulation of studied metals in muscle tissue, liver and kidney of cattle doesn't cause concerns about the quality of the use of this product by a man. There was revealed that chain of elements accumulation in in decreasing order was the following: for the muscle tissue, liver, kidneys and milk Pb> As > Cd >Hg. Calculated coefficient of chemical contamination shows that milk accumulates lead and mercury in a greater degree and muscle tissue is apt to accumulate cadmium and arsenic. Carried out researches of the level of heavy metals accumulation in the organism of pigs in the regions of Tumen region demonstrated that all achieved results were within the allowed limits of norms. It was found out that in animal organism heavy metals are allocated un unevenly, the biggest concentration was found in the liver and kidneys.