The productivity of row crops with minimized and zero tillage in the conditions of irrigation of the South of Ukraine

Abstract

Goal. To determine the productivity of 4-field crop rotation with minimized and zero main tillage and organomineral fertilizer systems using post-harvest residues and green manures in the conditions of irrigation of the South of Ukraine. Methods. Field, quantitative, visual, laboratory, computational, mathematical, and statistical methods using generally accepted in Ukraine methods and guidelines. Results. The data are given of experimental researches of formation of productivity of cultures of 4-field row crop rotation at various basic cultivation of soil and fertilizers on the irrigated lands in a zone of action of the Kakhovka irrigation system. It was found that the highest productivity was provided by crop rotation on the background of different depth chisel main tillage, which under the organomineral fertilizer system using after-harvest residues and green manure on the background of different doses of mineral fertilizers provided 8.06–9.10 t/ha of grain units. The use of green manure for fertilizer helped to increase crop rotation productivity with differentiated and shallow (12–14 cm) single-depth disc loosening by 6.5%, with different depth chisel — by 7.4, for zero — by 9.2%. Conclusions. On dark chestnut soil in the conditions of irrigation of the South of Ukraine, the highest productivity was provided by row crop rotation with different depths of shelfless main cultivation on the background of organomineral fertilizer system with N120P40 application and use for fertilizing of by-products of crop rotation and green manure.