Abstract
In the study, we have analysed the impact of lead (Pb), cadmium (Cd), chromium (Cr) and copper (Cu) on fine root biomass and the associated level of bioacumulation heavy metals in fine roots under alder plantings (Alnus incana, A. glutinosa and A. viridis) growing on technosols developed from combustion wastes and extremely poor quaternary sands excavated by sand mining. The control sites were located in natural habitats in the Bieszczady Mountains within the natural range of the occurrence of the investigated alder species. Results showed that the bioaccumulation index of heavy metals in the alder roots depended on technosol properties, in particular, pH and texture, and, to a lesser extent, on the total content of heavy metals in soil. Additionally, it was found that in some concentration ranges, Pb and Cr had a stimulating effect on the growth of fine roots.
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