Tertyshna A. Spatial distribution of microelements and clay minerals in podzolic soils on the slopes of left-bank forest-steppe of Ukraine

Object - formation processes of mineralogical and microelement composition of slope soils of podzolic series. Purpose - to identify influence patterns of factors and processes of slope soil formation on the mineralogical composition of the fine-grained mineral part of podzolized soils on Left Bank Forest Steppe of Ukraine, the content in the soil as a whole individual microelements, their mobility and availability to plants. Methods - field, chemical analysis, biogeochemical landscapely, soil-geochemical, radiographic, Statistics and Mathematics. Theoretical results - there were determined and theoretically generalized the regularities of the spatial inhomogeneity formation of microelement and mineralogical composition of the podzolic soils on Left-Bank Forest-Steppe of Ukraine. It was revealed genetic differentiation of mineralogical and microelement composition of podzolic soils on the slopes, associated with hydrothermal conditions of their formation. Practical results - by agrochemical certification of sloping lands, to increase the accuracy and reliability of soil and agrochemical data it is recommended to divide research fields at the monitoring areas with considering slope form, highlighting the concave slope part; to carry out the selection of soil samples on slope in the same or similar time. To clarify the conditions of microelement nutrition of crops and develop recommendations for its adjustment it should be carried out a combined soil and vegetation (functional) diagnostics. Novelty - it was detected genetically determined differentiation of mineralogical and microelement composition of podzolic soils on slopes that deepens the theory of slope soil genesis. It was established for the first time: the differences of the spatial distribution of clay minerals in podzolized soils on acclivous slopes compared to upland conditions; particular qualities of the distribution of available and fixed forms of trace elements on the catena and slope soil profile of podzolic series due xeromorphic growth, decrease in the intensity of humus accumulation, approaching the surface of calcium carbonate, which is accompanied by a deficit of plant nutrition; it was proved that the estimate of the radial and lateral redistribution of trace elements is advantageously to carry out on the basis of an analysis of the clay fraction and but not the soil as a whole, it complements the picture of the role of the highly dispersed soil part as a source of trace elements and factor of their mobility in the profile and in the landscape. Degree of application - the results of research activities are implemented in SI "Institute for Soil Conservation of Ukraine" to improve methods of soil monitoring and agrochemical research on sloping relief elements. Materials of the thesis are used in the educational process of higher educational institutions for the preparation of bachelors and masters in the field of natural and agricultural sciences. The field is agricultural, nature protection.