Yurchenko T. Еcotoxicological assessment of the phosphoric fertilizers application on sod-podzol soil of Polessja of Ukraine

The dissertation is devoted to the study of phosphoric fertilizers influence on environmental quality of Polyssja agrocenosis components. The new fertilizers "Agrophoska" application on sod-podzol soils of Polyssja potential and actual risk assessment have been carried out. Agrophoska is recommended for application for cereals on sod-podzol soil in the rate P60-180. The influence of phosphoric fertilizers on heavy metals behavior in the soil has been investigated: the studied fertilizers reduce the heavy metals availability and restrict their migration by the soil profile into ground water. Risk assessment simulation model of the phosphoric fertilizers application has been worked out. Using it the coefficient of immobilization-mobilization (Ki-m) of the heavy metals potential available forms has been calculated. The heavy metal transition coefficient (Kп) in the soil-plant system has been calculated. It was proved that phosphoric fertilizers increase the rate of desiccants degradation and give the possibility to receive environmentally safe production of plant cultivation, judging by pesticides residue and heavy metal contamination,