EFFECTIVENESS OF FERTILIZATION OF WINTER WHEAT ON DIFFERENT BACKGROUNDS OF CHEMICAL AMELIORANTS IN THE CONDITIONS OF WESTERN POLISSIA

Abstract

The results of the economic and energetic assessment of the use of mineral fertilizers for winter wheat in the conditions of the Western Polissia on turf-podzolic loamy-sandy soil, determined by different methods, against the background of different types and doses of chemical meliorants are presented. On the basis of field research conducted in 2021–2023, it was established that 2.68 t/ha of grain was collected against the background of 1.0 HА dose of dolomite flour without the use of mineral fertilizers, i.e., the increase compared to the control was 31.4 percent. Application of the recommended dose of mineral fertilizers (N120Р60K90) in combination with microfertilizer against the background of dolomite flour for winter wheat in the Western Polissia zone contributed to an increase in yield up to 4.52 t/ha, or by 68.6 percent compared to the background and 121.6 percent compared to control. The higher grain yield of 5.00 t/ha, which was N130Р25К35, increased the yield in relation to the background and control by 63.4 and 114.7 percent, respectively. When applying N120P60K90+microfertilizer on the background of one and a half doses of CaMg(СО3)2, compared to their application on the background of a single dose of the same meliorant, the grain yield increased from 4.52 to 4.64 or by 0.12 t/ha. The highest increase in grain yield – 2.93 t/ha compared to the control (2.04) was ensured by the introduction of the dose of mineral fertilizers N150Р50К150+microfertilizer calculated according to the norms of removal of the programmed grain harvest and the corresponding amount of straw, but the highest conditionally net profit – 4306.4 hryvnias/ha with an increase in yield compared to the control of 2.34 t/ha, obtained on the variant with application of N130Р25К35+microfertilizer. Complex application of nitrogen, phosphorus, potassium fertilizers and microfertilizers against the background of liming increased the coefficient of energy efficiency to 4.21–4.37 units for 3.88 units on control.