BIOGEOCHEMICAL ACTIVITY OF WOODY SPECIES IN THE ABSORPTION OF MANGANESE, CADMIUM, LEAD, NICKEL IN THE ZONE OF THE HIGHEST CONCENTRATION OF TOXICANTS OF THE INDUSTRIAL CENTER AND IN THE ZONE OF CONDITIONAL CONTROL

The results of studies on the content of metals in the soil and aboveground, underground organs of woody plants in the zone of the highest concentration of toxicants in the conditions of the Sterlitamak Industrial Center (SIC) and in the zone of conditional control (ZCC) are presented. It was found that the soil samples contained un equal amounts of heavy metals. The content of heavy metals exceeded the maximum permissible concentration in the conditions of the Sterlitamak industrial center by no more than 2.3 times. The gross content of heavy metals decreased in the series: Pb > Ni > Cd. Based on the characteristics of the features of metal translocation, it is shown that the roots of birch, poplar, and larch are able to absorb a significant amount of metals from the soil. A high degree of accumulation of Mn, Ni, Cd, Pb by the roots of all studied plants was found. The biogeochemi cal activity of the hanging birch, balsamic poplar, Sukachev larch was studied in the conditions of the Sterlitamak industrial center and in the conditional control zone. In the conditions of the SIC, according to the indicator of the biological absorption coefficient and according to the series of biological absorption Cd, Ni, Pb are elements of "medium capture", the highest indicator of biogeochemical activity (IBA) was detected in woody plants growing in the zone of conditional control, and the smallest – in the zone of the highest concentration of toxicants in the conditions of the Sterlitamak industrial center. According to the results obtained, it was revealed that the highest biogeochemical activity is characteristic of larch in the ZCC (IBA 7.15) poplar (IBA 5.12) birch (IBA 4.76) and lower indicators in the conditions of the SIC with a pronounced anthropogenic load, the IBA of which was 2.44, 1.84 and 1.96, respectively.