Semyashkina A. Optimization technigues of the cultivation of oats in the conditions of the North Steppe of Ukraine

The object of research – the reaction of oat varieties in terms of sowing, fertilizers doses, the use of biological products and griwth promoters and the adaptive capacity of sorts. Purpose - to determine the response of oat varieties grown in the investigated agrotechnical measures in the changing environment of hydrothermal factor of northern Steppe and install the most effective elements of the crops growing technology. Research methods - field, laboratory experiments and modeling - determining the dynamics of plant growth and development , their reaction on the invastigated factors, the mathod of synthesis - generalization of research results and forming of conclusions; statistic - definition of significance factors that were researched, correlations, the degree of variation of characteristics and adaptive ability of oats plant. Results - improved methods of oats cultivation provide in the northern Steppe yields at 3,06-3,87 t/ha grain. Their effectiveness is confirmed in terms of production enterprises of Dnipropetrovsk region (Synelnykovo and Krynychans'kyy areas) on areas 30 and 25 hectares. Novelty - for the first time in the northern Steppe of Ukraine carried out studies of reaction of varieties of oats to the parameters of adaptability for various morphological and biological features on the change of weather factors and technological methods. The effectiveness of the elements of area technology of growing of oats varieties were substantiated: sowing dates and modes of mineral nutrition were optimized, the role and the degree of influence of bioligocal agents and growth regulators on formation of grain productivity of varieties were defined. Branch - agriculture.