Kokhan A. Agrotechnological bases of increase of productivity of sunflower in the conditions of insufficient and unstable moisture

Object of research - Features of growth, development and formation of yield and quality of new sunflower hybrids depending on sowing methods, plant density, fertilizers, bacterial preparations, tillage and crop care. The purpose of research - development and improvement of technological measures for growing high and quality sunflower yields, taking into account the peculiarities of plant growth and development, to establish patterns of productivity of new hybrids depending on weather conditions, the share of crop in crop rotation, tillage systems, fertilizers, biologics, physiologically active substances. Research methods - field and laboratory; statistical; settlement and comparative. Research results - For theory: For the first time, the theoretical provisions and practical recommendations for increasing the productivity of sunflower by developing new and improving existing measures in environmentally friendly and resource-saving technologies are comprehensively substantiated. In the conditions of insufficient and unstable humidification of Ukraine the peculiarities of the influence of natural and anthropogenic factors on the growth and development of plants, formation of yield and quality of seeds of new hybrids of sunflower of domestic selection are established. For practice: Developed and recommended for production new and improved technological measures for growing sunflower when sowing with rows between 35 and 70 cm based on the use of biologicals, growth regulators, optimal sowing dates, plant density, tillage methods and crop care. The developments presented in the dissertation were included in the recommendations for growing field crops of Poltava region (2012-2015) and implemented in farms on an area of ​​over 20 thousand hectares. Scope - agricultural enterprises of the Steppe of Ukraine.