Studies regarding the establishment of perennial plant communities stimulated with biosolids on fly ash dumps

This is a study regarding the storage of waste in a dump which seriously deteriorates the
soil properties, both in the storage area and the surroundings. Application of fertilizing materials
(biosolids) on barren ground is often used for the introduction of organic matter and nutrients for
plant growth on such soils. Two forage plant species were used: tall fescue (Festuca arundinacea) and
sainfoin (Onobrychis viciifolia). F. arundinacea presented a higher degree of growth and density in
comparison with O. viciifolia. The bioaccumulation degree of heavy metals (Fe, Cu, Cr, Ni, Zn and
Pb) in the aerial tissue of plants was analysed. The addition of biosolids fertilizer caused a significant
reduction of metal accumulation in tissues for both species. It may be concluded that the pollution
caused by fl ash had a bad influence on the growth and development of O. Viciifolia plants, even
lethal. Plants of O. Viciifolia gradually disappeared in the dry months of summer.