ACCUMULATION OF TRACE ELEMENTS BY WINTER WHEAT PLANTS DEPENDING ON THE CULTIVATION TECHNOLOGY

Purpose: to assess the level of accumulation of copper, zinc, manganese and cobalt in winter wheat, depending on its cultivation technology. Materials and methods. The work was carried out in 2020–2024 on typical chernozem of the Kursk region. Four agrotechnologies of winter wheat cultivation, based on various methods of primary tillage: traditional (plowing 20–22 cm), differentiated (non-tillage 20–22 cm), minimal (disking up to 8 cm) and direct sowing, were studied. All technologies used mineral fertilizers at a dose of N₁₇P₄₅K₄₅ kg/ha in the main and N₅₁ in the spring top dressing. Results. In the roots of winter wheat, the maximum copper content was when using a differentiated technology (18.31 mg/kg). The highest content of zinc (41.37 mg/kg) and manganese (253.76 mg/kg) in the roots was observed with direct seeding technology. As the technology is minimized, the concentration of copper in winter wheat straw decreases by 0.04–0.30 mg/kg, while zinc and manganese increase by 1.21–2.56 and 9.24–15.20 mg/kg, respectively. In winter wheat grains, from traditional technology to direct sowing, the copper content increases by 0.51–0.81 mg/kg, zinc by 0.39–3.05 mg/kg. The maximum amount of manganese was found in grain grown with a differentiated technology (31.61 mg/kg). The cobalt content in roots, straw and grain does not change significantly according to the studied technologies. Conclusions. The coefficient of biological accumulation of trace elements in winter wheat grain is higher than in roots and straw. For copper, it is 5.77 and 8.50 times higher, zinc ‒ 24.58 and 7.17 times, manganese ‒ 3.04 and 2.23 times, cobalt ‒ 8.4 and 8.4 times, respectively. The highest biological absorption of the studied trace elements by all parts of plants is noted when using direct seeding technology.