The paper presents the results of the studies on the determination of the effect of foliar dressings with macro- and micronutrient fertilizers on linear growth, the mass of air-dry matter of plants, leaf surface, the formation of a symbiotic apparatus and the yield of seeds of white lupine (Lupinualbus L.) in the conditions of black soils of the Central Black Earth region of the Russian Federation. The field experiments were carried out in 2018-2020 at the Department of Crop production, Breeding and Horticulture of Belgorod State Agrarian University. The object of the research is a high-intensity variety of white Degas lupine. The subject of the research is microfertilizer Aquamix-TV, potassium sulfate fertilizer (K2SO4), phosphate-potassium monophosphate fertilizer (KH2PO4). The weather during the years of the experiments was hot and dry. During the critical periods of the development of lupine plants, a moisture deficit was observed with the excess of heat. The soil cover of the experimental site was represented by a typical medium-thick low-humus heavy loamy black soil with a granulometric composition. The accounting area of the plot was 18 m2, the replication was fourfold and the placement was systematic. The experiment included six variants: control (without fertilizers), foliar dressing with Aquamix-TV micronutrient fertilizer, foliar dressing with potassium sulfate solution, foliar dressing with potassium monophosphate solution, foliar dressing with Aquamix-TV + potassium sulfate mixture and foliar dressing with Aquamix-TV + monophosphate mixture potassium. The analysis of the obtained data showed that the highest yield of seeds of white lupine variety Dega was obtained on variants with foliar dressing with micronutrient fertilizer Aquamix-TV in combination with potassium sulfate and monopotassium phosphate, which amounted to 3.52 and 3.51 t / ha, respectively, which is 0.52 and 0.51 t / ha or 17.3 and 17.1% more than the control variant.

The study of white lupine samples of grain-forage direction developed by the All-Russian Research Institute of Lupine were carried out for three years (2019–2021) on the fields of the collection farm of the of the department of plant production, breeding and olericulture of the Belgorod State Agrarian University named after V.Ya. Gorin. There have been studied 4 varieties and 26 lines, the variety ‘Michurinsky’ was the standard in the trial. According to the seed productivity in all years of study, most varieties and lines significantly exceeded the standard. On average for 3 years, the most productive lines were ‘SN 17-14’, ‘SN 54-08’ and ‘SN 12–13’, which increase ranged from 43 to 48 % in comparison with the standard variety. Productivity increase from 34 to 39 % was given by the lines ‘SN 816-09’, ‘SN 1735-10’, ‘SN 35-13’ and ‘SN 77-17’. The increase of the varieties ‘Pilgrim’ and ‘Aliy parus’ and four lines ‘SN 18-13’, ‘SN 15-13’, ‘SN 55-14’, ‘SN 138-16’ varied from 21 to 26 % compared to the standard. The variety ‘Timiryazevsky’ and lines ‘SN 1397-10’, ‘SN 78-16’ and ‘SN 25-11’ exceeded the standard on 13–18 %. At the same time, the lines ‘SN 76-16’ and ‘SN 1022-09’ produced the lowest yields, significantly inferior to the standard. The calculation of the adaptability coefficient has shown that the varieties and lines that provided high and stable seed productivity over the years are also highly adaptive to the arid conditions of the region, since this coefficient has exceeded 100 %. The protein percentge in seeds on average for 3 years ranged from 29.55 to 36.45 % with 32.27 % for the standard. Its percentage exceeded 35.0 % among 7 lines and the variety ‘Pilgrim’. The oil content in seeds of the white lupine varieties and lines on average for 3 years ranged from 10.00 to 11.54 %. Most varieties and lines in the trial according to the content of alkaloids in seeds belong to the group of low alkaloids (up to 0.099 %) and medium alkaloids (up to 0.299 %).

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The study results on using macro- and micronutrients in the cultivation of white lupine (Lupinusalbus L.) in the soil and climatic conditions of the Central Black Earth region of Russia are presented. Field trials were carried out in 2018-2020 at the Department of Plant Growing, Breeding and Vegetable Growing in Belgorod State Agrarian University. The object of research is a high-intensity variety of white lupine Degas. The subject of research is the Aquamix microfertilizer of two brands – Aquamix-T (for seed treatment) and Aquamix-TV (for foliar dressing), macrofertilizers – potassium sulphate (K2SO4) and potassium monophosphate (KH2PO4). The weather conditions during the years of the experiments were unfavorable for the growth and development of lupine, since during the entire growing season of the plants an increased temperature regime was observed with a deficit of precipitation. The soil cover of the experimental field is represented by typical chernozem with an average content of basic nutrients. The accounting area of the plot is 18 m2, the replication is fourfold, the placement is systematic. The experiment included seven options: 1) control (without fertilizers), 2) seed treatment with Aquamix-T micronutrient fertilizer, 3) seed treatment with Aquamix-T micronutrient fertilizer and foliar fertilization with Aquamix-TV micronutrient fertilizer, 4) seed treatment with Aquamix-Tilist micronutrient fertilizer solution potassium sulphate, 5) seed treatment with microfertilizer Aquamix-Tilist feeding with potassium monophosphate solution, 6) seed treatment with micronutrient Aquamix-Tilist fertilizer with a mixture of Aquamix-TV + potassium sulphate, 7) seed treatment with micronutrient fertilizer Aquamix-Tilist fertilization with potassium monophosphate mixture. Analysis of the data obtained showed that the highest yield of white lupine seeds was obtained on the variants with seed treatment with Aquamix-T micronutrient fertilizer together with foliar dressing with Aquamix-TV micronutrient fertilizer in combination with K2SO4 or KH2PO4 macrofertilizers, which was 3.64 and 3.62 t/ha, respectively, which is 0.64 and 0.62 t/ha or 21.3 and 20.5% above the control variant.