EFFICIENCY OF DIFFERENT TYPES OF NITROGEN FERTILIZERS APPLIED IN ERALY SPRING TO WINTER WHEAT

Abstract

The paper presents the results of the research conducted in 2020–2022 to study the efficiency of applying various types of nitrogen fertilizers to the winter wheat variety Elegy in early spring, depending on the period of application. It’s established that the efficiency of the studied types of nitrogen fertilizers depends on weather conditions at the time of fertilizers application. With unreasonably early (before vegetation) application of UAN, the increase in grain yield decreased from 27.1% to 5%. The application of ammonium sulfate before vegetation made it possible to obtain the maximum yield increase of 21.0% compared to the control, when applied 14 days after the resumption of vegetation - only 9.9%. The application of urea regardless of the period of application, made it possible to obtain the yield increase of 13.6–15.8% compared to the control variant.