Efficiency of fertilisers in restoring ecosystems on fly ash deposits

Abstract

The effect of municipal sludge compost application as a source of nutrients in the vegetation of fl ash deposits with perennial plants Lolium perenne species was evaluated. studies were carried out on experimental plots including compost alone and mixed with indigenous pillared tuff. The study demonstrates the effectiveness of each type of treatment on plants coverage, the amount of biomass and resulted metal bioaccumulation in the aerial parts of harvest. Pillared tuff used as amendment has determined the obtaining of a vegetable cover with low accumulation of toxic metals. Fertilisation with compost resulted in removal of the amount of Cr and Ni with 60 and 76% in the case of Pb in the aerial parts of plants versus the bioaccumulation in plants grown on fl ash experimental variant. Addition of indigenous volcanic pillared tuff has determined a higher removal in the accumulation of toxic metals by over 10%. The highest removal was recorded in Pb bioaccumulation in the aerial parts of Lolium perenne versus the accumulation in plants grown on untreated variant fl ash.