Korchashkina L. Peculiarities and regulation of the processes of transformation and migration of nitrogenous compounds in floodplain soils in Left Bank Forest Steppe

Object - transformation of nitrogenous compounds, especially its ecologically safe regulation in floodplain soils of different genesis and use. Purpose - to define features of the nitrogenous compounds transformation in floodplain soils of Left Bank Forest Steppe on which to correct the existing measures to regulate nitrogen regime in the direction of environmental sustainability in the floodplain land. Methods - expedition, field, model-growing, laboratory-model, laboratory-analytical research. Results of research are processed by methods of variational, correlational and dispersive analyses. Theoretical results - key factors which regulate the processes of transformation and migration of nitrogen compounds in floodplain soils of Left Bank Forest Steppe of Ukraine were determined. It was proved the influence of soil particle size distribution on the process of prolongation of the release of nitrogen from organic matter and its transition into a mineral form. It was established diverse profile differentiation of nitrogen pool, depending on the characteristics of morphological and genetic structure of alluvial soil, term and doses of nitrogen fertilizers. The role of vegetation, microbiological and biochemical parameters as the decisive factor in the process of transformation of nitrogen compounds floodplain soils was estimated. Practical results - based on the results of studies on nitrogen transformations it were revised measures for the environmentally safe management of nitrogen regime in the main types of floodplain soils and prevention of environmental risks in the intensive grassland. Novelty - consists in defining the parameters of the nitrogen pool in the main types of alluvial soils of Left Bank Forest Steppe and the degree of compliance of nitrogenous substances of alluvial meadow soils to the transformation processes, their nitrogen- mobilizing and nitrogen-immobilizing ability. Degree of application - results of studies were implemented in "Karat Ltd", Novovodolazhskiy district, Kharkiv region in the area of 55 ha of floodplain meadows. Certain provisions of the thesis can be used in the educational process in teaching disciplines of soil science and soil conservation. The field is nature protection and agriculture.