Vlasenko I. Agroecological condition of typical chernozems of the Right-Bank Forest-Steppe of Ukraine under the influence of spatial heterogeneity of water regime

The dissertation work presents the results of a comprehensive study of the agroecological state of typical chernozems of the Right-Bank Forest-Steppe in conditions of spatial heterogeneity of the soil cover of the NULES of Ukraine separated subdivision “Velikosnitinske research farm named after O. V. Muzychenko", directly to the agroecosystems of research fields in depressions with various phytocenoses: winter wheat, alfalfa for green forage (3 years of cultivation) and spring barley using field, laboratory and remote sensing methods (analysis of space images). Using the biocenosis of alfalfa as an example, it has been shown that soil moisture conditions for depressions have their own specificity and they can change dramatically during the dry season of the growing season – at the bottom of the depressions, moisture reserves can be less than on the plain part of the field and restore their typical regime after precipitation. The study of the yield of alfalfa showed that for the depression "№ 1" the yield decreases in the direction from the slope to the flat area. At the bottom of the depression, the yield of the crop was not obtained in comparison with the plot on the slope, where it was 119.4 c/ha, and on the plain of the field – 99.4 c/ha. With an average yield of alfalfa on the farm 105.8 c/ha. The use of modern UAV and remote sensing means made it possible to substantiate and develop a scientific position on the influence of the water regime of typical chernozems of the Right-Bank Forest-Steppe of Ukraine within the relief depressions (potholes) on the agroecological state of soils and phytocenoses during the growing season, the productivity of agricultural crops (winter wheat, spring barley, alfalfa) and to develop an integrated approach to study the problem of agroecosystem productivity.