Romaniuk V. Formation of yield and grain quality of spring barley varieties depending on the rates of nitrogen fertilizers and plant growth regulators under conditions of the right-bank Forest-Steppe

The object of the research is the processes of growth and development of spring barley varieties, yield formation and its quality depending on the biological characteristics of the variety, doses of mineral fertilizers and plant growth regulators. The purpose of the research is to identify the dependencies of yield formation and grain quality of spring barley varieties on the influence of doses of mineral fertilizers and plant growth regulators under conditions of the right bank Forest-Steppe. The methods of the research are visual, quantitative, thermostat-and-weight and calculation, physiological, biochemical, dispersion, correlation and regression. The thesis presents the research results on the dependence of yield formation and grain quality of spring barley depending on the doses of mineral fertilizers and plant growth regulators under conditions of the right-bank Forest-Steppe. The peculiarities of formation of the photosynthetic apparatus of spring barley plants depending on technological methods and hydrothermal conditions are studied. The processes of formation of fruit elements and individual productivity of spring barley plants are described. A direct correlation between the rate of individual and grain productivity of spring barley is established. Energy and economic assessment of the technologies is carried out and the rate of their competitiveness is determined. The improved technology of spring barley cultivation has undergone industrial inspection during 2012-2018 at the farm “Favor”, village Radianske, Lityn region, Vinnytsia oblast and LLC “Olga”, village Stadnytsia, Vinnytsia region, Vinnytsia oblast on the total area of 10 hectares, which provided grain yield of spring barley varieties of 4.77 and 5.46 t/ha, respectively.