RESPONSIVENESS OF SPRING SOFT WHEAT (TRITICUM AESTIVUM) TO THE APPLICATION OF MINERAL FERTILIZERS IN THE CONDITIONS OF THE REPUBLIC OF TATARSTAN

The purpose of this study was to study the effect of various doses of mineral fertilizers on the development and yield of spring wheat in relation to the conditions of gray-forest and leached chernozem soils. On both types of soils, the application of mineral fertilizers at a dose of N90P90K60 kg of active substance per hectare provided the highest grain yields: 2.88-2.95 t/ha and 3.47-3.59 t/ha. The yield increase in the Yoldyz variety was 830-990 kg/ha, in the Burlak variety - 800-1060 kg/ha, with yields in the control of 2.05-2.48 and 2.15-2.3 tons/ha, respectively. Mineral fertilizer at a dose of N45P45K45 + N15 (foliar top dressing) increased the vitreous content of Yoldyz grain by 4.4% and Burlak by 4.2% compared with the control. At the same time, the protein content and the mass fraction of gluten in grain increased by 2.3 and 4.2%, respectively, for the Yoldyz variety and by 1.5 and 3.3% for the Burlak variety. The grain with the highest protein content was grown with springer sowing.