Drobit O. Formation of the corn hybrids productivity depending on the agrotechnical measures in the irrigated conditions of Southern Steppe of Ukraine

Object of research - processes of growth, development, formation of grain productivity, photosynthetic activity, water consumption of plants of hybrids of corn under conditions of irrigation of the Southern Steppe of Ukraine. The purpose of the research is to determine the peculiarities of the formation of the productivity of new hybrids of maize of different groups of ripeness by optimizing the sowing and planting density in conditions of irrigation of the Southern Steppe of Ukraine. Research methods - field; laboratory; computational and comparative, statistical. Research results - For the theory: For the first time in the conditions of irrigation of the Southern Steppe of Ukraine the elements of varietal agrotechnics of new hybrids of maize of different groups of maturation have been improved; The complex action of the sowing dates and the density of the stand on the formation of grain productivity of the crop is determined. The ability of maize hybrids of different FAO groups has been determined and substantiated to formulate sustainable productivity in different weather conditions, depending on the timing of sowing and standing densities. For practice: To obtain guaranteed high yields and quality of grain of new hybrids of maize of different groups of maturity for growing them in irrigation in the conditions of the Southern Steppe of Ukraine, it is proposed to apply optimal sowing dates and the density of standing under irrigation conditions. Sphere of use - agricultural enterprises of the south of Ukraine.