Shestak V. Optimization of nitrogen nutrition of winter barley on the dark gray podzolized soil of the Western Forest Steppe

Increased doses of nitrogen application are dangerous due to nitrate losses. Leaching is occurred by vertical and lateral flows. The emission of nitrous oxide as a greenhouse gas is activated. The question arose of effective mineral and, in particular, nitrogen fertilization in compliance with modern principles of natural environment protection in conditions of climate change. It became necessary to solve the urgent problem of optimization of nitrogen nutrition in combination with the use of the nitrogen stabilizer nitrapyrin on the dark gray podzolized soil of the Western Forest Steppe. Experiments were carried out at the Lviv National Environmental University in the area of Pasmovy Pobuzhzhia of the nature and climate zone of the Western Forest Steppe during 2019-2021. The purpose of the research is to find out the agronomic effectiveness of nitrapyrin and the effect of different rates and forms of nitrogen fertilizers on the yield of winter barley on dark gray podzolized soil in the Western Forest Steppe. The soil is a dark gray podzolized light loam with low humus. Traditional methods of field research and standardized methods of laboratory analyzes were used. The dissertation proposed effective rates of nitrogen fertilization of winter barley with a combination of nitrapyrin application to optimize nitrogen nutrition of the crop, prevent nitrogen loss due to leaching of nitrates, prevent the emission of nitrous oxide into the atmosphere.