Abstract
The work presents the results of many years of research on the assessment of the vital state, accumulation and distribution of manganese, nickel in absorbing, semiskeletal, skeletal roots and in the aerial, organs in healthy and weakened balsamic poplar trees (Populus balsamifera L.) under the conditions of the Sterlitamak industrial centre. It was found that under the influence of heavy metals under pollution conditions at a depth of 0 - 10 (20) cm, the proportion of absorbing roots of balsamic poplar decreases in comparison with the control. It was revealed that under the conditions of the Sterlitamsk industrial centre, high concentrations of Ni and other metals in soils reduce the supply of Mn to plants. The high content of Ni and other metals in soils under the balsamic poplar stands negatively affects the vital state of trees and leads to a decrease in absorbing roots.
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