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AIDED PHYTOSTABILISATION REDUCES METAL TOXICITY, IMPROVES SOIL FERTILITY AND ENHANCES MICROBIAL ACTIVITY IN CU-RICH MINE TAILINGS
Touceda-Gonzalez, M., V. Alvarez-Lopez, A. Prieto-Fernandez, B. Rodriguez-Garrido, et al.
Journal of Environmental Management 186(2):301-313(2017)

A phytostabilization field trial was implemented in spring 2011 in Cu-rich mine tailings in NW Spain. The tailings were amended with composted municipal solids and planted with a grass (Agrostis capillaris) and with willow (Salix spp.) and poplar (Populus nigra L.) trees. Compost amendment improved soil properties, such as pH and fertility, and decreased soil Cu availability, leading to the establishment of a healthy vegetation cover. Both compost amendment and plant root activity stimulated soil enzyme activities and induced important shifts in the bacterial community structure over time. The beneficial effects of the phytostabilization process were maintained at least three years after treatment.



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