Productivity of spring wheat varieties when using foliar fertilization

Abstract

The research findings (2021-2022) of a three-factor field experiment on sod-podzolic soil in the crop rotation of the collective farm “Mir” in the Torzhokskiy District of the Tver Region are discussed. Three varieties (factor A) were studied in the experiment: Ivolga, Irgina, Zlata; foliar dressing with complex fertilizers (factor B): Ultramag Combi, Aquarin 5, Vitanol RK and timing of foliar dressing (factor C): one - at full tillering stage, two - at tillering and stem elongation stages. As a result, a significant increase of the yield of all varieties from foliar dressing was revealed. On average, over two years, the complex use of VitanolRK fertilizer turned out to be more effective, ensuring yield gain on average for varieties by 1.56 t ha (52.3%). The Ivolga and Zlata varieties responded strongly to fertilization. Of the varieties, Ivolga (4.15 t ha) and Zlata (3.86 t ha) turned out to be more productive with the yield of the Irgina variety of 3.41 t ha. Double spraying did not provide significant yield gains. Yield increase from fertilization is explained by the increased photosynthetic activity of plants and the course of the production process.