Bagatchenko V. Increasing the productivity of parent forms of maize hybrids by optimizing agrotechnical measures

The object of research is the process of formation of seed productivity of parent components of hybrids of corn, depending on the agronomic measures of cultivation. The purpose of the dissertation is to establish the factors that affect the seed productivity of parent components (self-pollinated lines and simple interlinear hybrids) by optimizing agronomic measures, in particular: sowing dates, plant density and the use of modern drugs of biological origin. Research methods: field; laboratory; identification; measuring; calculated; mathematical and statistical.Scientific novelty - for the first time in the conditions of the right-bank Forest-Steppe of Ukraine the regularities of formation of seed productivity, sowing and technological properties of seeds at parental forms of hybrids of corn depending on their genetic features and elements of technology of cultivation are scientifically substantiated. The effectiveness of the effect on seed productivity of parent components of simple hybrids: Rist SV, Rushnyk SV, Richka S and self-pollinated lines: UR 9 zS, UR 331 SV, UR 12 zS sowing dates and found the optimal. The optimal standing density of plants was determined and the effectiveness of biological products on the formation of seed productivity of parent components of corn, which can be used in further selection work and seed production in farms that grow hybrid seeds with the participation of studied lines and simple interlines. Effective elements of technology of cultivation of parent components of maize hybrids are improved: simple hybrids:Rist SV, Rushnyk SV, Richka S and self-pollinated lines: UR 9 zS, UR 331 SV, UR 12 zS in the conditions of right-bank Forest-steppe of Ukraine (sowing terms, plant density, application drugs of biological originThe regularities of growth, development and dynamics of formation of seed productivity of plants of parental components of corn depending on elements of technology - terms of sowing, density of standing of plants and use of preparations of a biological origin have received further development. Scope - agricultural production.