ANALYSIS OF ECOLOGICAL AND GEOCHEMICAL INDICES FOR PLANTS OF THE SPECIES POTENTILLA TANACETIFOLIA GROWING IN THE CONDITIONS OF THE CITY OF CHITA AND THE CHITA REGION
UDC 581.5 (571.55)
Abstract
The use of biogeochemical research methods is necessary when studying the technogenic migration of toxic elements in urban ecosystems. Using the values of the ecological and geochemical indices, we assessed the degree of accumulation and movement of zinc, lead, cadmium, and copper from the soil to the organs of plants of the species Potentilla tanacetifolia. The content of elements was determined by the method of inverse voltammetry on a «TA-Universal» analyzer. According to the results of the studies and the values of environmental and geochemical coefficients, it was found that, according to the level of soil pollution, the studied areas of the city of Chita and the Chita region were classified as territories with a low level of pollution. According to the values of ecological and geochemical indices for plants of the P. tanacetifolia species, intense absorption of cadmium by the root system and active movement of zinc and copper from the root layer of soils were noted. The translocation coefficient (TF) values indicated the intake of copper, lead, and cadmium into the aboveground organs in almost all the studied sites. According to the value of the discrimination coefficient, it was found that this species intensively accumulates cadmium. The results presented by us indicate that plants of the P. tanacetifolia species can be attributed to accumulator species with a rather high degree of accumulation of heavy metals at a low concentration in the medium.
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