THE ASSESSMENT OF THE EFFICIENCY OF FAST GROWING TREES USING FOR PHYTOREMEDIATION OF CONTAMIBAYED ECOSYSTEMS
Phytoremediation it is effective method for cleaning and rehabilitation of soils ecosystems. The goal of our investigation was the assessment of willow trees potential for phytoremediation of heavy metals and biogenic elements (phosphorus and nitrogen). Willow it is not hyperaccumulator, but it may clean the soil effectively because of fast growth and big biomass. The field experiments were conducted in 2011-2015 on sandy-loam soils in two regions of Belarus. The transfer factors for cadmium, lead, nickel and manganese have been less than one unit. It is not possible to accumulate a lot of these elements (with the exemption of manganese) by willow trees. It means, that willow plantations may be used for cultivation on the soils which are contaminated with manganese, and willow trees will be also resistant to influence of cadmium and lead. The transfer factors for copper and zinc were more than one unit and it has positive effect for willow trees, which are cultivated on the soils with low contents of microelements. The additional application of potassium in the greatest degree stimulate accumulation of copper, also have a positive effect for accumulation of zinc and manganese, and not has influence on accumulation of cadmium, lead and nickel. The accumulation of phosphorus and nitrogen with willow biomass support a good perspective for using willow plantations as a vegetative filter, which may prevent the eutrophication of water objects.