The article presents the results of the studies on the combined use of microbiological preparations and NanoSilicon in oat cultivation. Biological products (Fungilex, Bactophosphine, Extrasol, Fitosporine) were used for presowing seed treatment, NanoSilicon – for leaf treatment. Presowing seed treatment with Fitosporine, Bactophosphine, and Extrasol increased the height of oat plants and changedthe panicle length: the height of oat plants after seed treatment with Extrasol was 6.3 cm or 8.3% higher than the control one, with Fitosporine – 5.9 cm or 7.7% higher. Fungilex seed treatment reduced oat height by 6.5 cm, or by 8.5%. Bactophosphine seed treatment did not affect the plant height. While the combined use of seed bacterization and treatment with NanoSilicon decreased the height of oat plants by 1.6-18.7 cm, or by 2.1-22.6%, the stimulating effect of the combined use of Fungilex and NanoSilicon on the growth and height of plants was observed. Seed bacterization with biological products increased the yield of oats. It was greatest when using Extrasol for seed treatment and amounted to 25.9 c/ha, which was 7.0 c/ha higher than in the control option. The leaf treatment with NanoSilicon increased the yield by 2.6-5.4 c/ha. Combined treatment of oat plants with Nanosilicon and Extrasol reduced the yield by 1.6 c/ha. The combined presowing seed treatment with biological products and leaf treatment with NanoSilicon increased the yield of oats by 2.7-5.9 kg/ha compared to the control option due to an increase in the number and weight of grains in the panicle. The highest yield – 26.7 c/ha was obtained when treating seeds with Fungilex and leaves with NanoSilicon (7.8 c/ha or 37.0% higher than in the control option).

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The article describes the effect of fungicide and microbial protectors used for pre-sowing seed treatment on oat production capacity. It analyses agents of various origins and functions (Vial Trust® Maxim® Selest® Top, Extrasol®) and the results of the tests. The research demonstrates that pre-sowing seed treatment with Vial Trust® had a positive effect on the length of the whisk. Maxim® contributed to the increase in the 1000-grain weight, whereas seed treatment with Extrasol® showed a positive effect on the field germination rate of the oat plants, the height of the plants, the number of the cones in the whisk. It also contributed to the decrease in the number of defective cones, increased the number of grains in the whisk, boosted grain weight in the whisk and enhanced the crop productivity. In all cases, the results of the treated variants exceeded the control variants, thus demonstrating their efficiency and sustainability effect.

Sunflower is one of the strategic crops of the agro-industrial complex not only in Russia, but also around the world: sunflower seeds are used not only for food products and feed from production waste, but also for energy carriers. In recent years, the cost of sunflower oil has shown high growth dynamics, and we believe that against the background of the general growth in the consumption of “green” renewable energy, it will also show growth. The high demand for sunflower oilseeds both in the domestic and foreign markets is due to the wide range of products produced from this raw material, and this trend has persisted for many years due to an increase in the population and an increasing demand for high-quality food products. In addition, an increasing number of consumers in Russia have a negative attitude towards the widespread palm oil on the international market, preferring sunflower oil or its processed products. Sunflower oilseeds are cultivated everywhere both in the Russian Federation and in the world. However, the high variability of soil-climatic conditions, the emergence of new varieties, hybrids and plant protection products with high attention to zero soil treatment technologies require research and justification of mass production. The high price of the crop made it possible not to touch on the issues of the effectiveness of sunflower cultivation and ensuring its high quality, this article is designed to fill in these gaps. The authors of the article investigate the hypothesis of the dependence of sunflower quality on the technology of its cultivation. Mathematical methods were used to substantiate the conclusions, which made it possible to identify significant and secondary factors of cultivation technology and obtain an assessment model.