The potato is one of the most versatile, accessible and at the same time widespread vegetable crops of the globe, and in particular of the Russian Federation. Today notable can be imagined without it. But despite the plasticity of the potato crop, there are still “white spots” in its production. With late and even return spring and early autumn frosts, the climatic features of Siberia significantly affect the crop’s growing season, preventing it from realising its full potential. Like that of many other crops, potato production is associated with seasonality, and there are often significant losses during cultivation and especially during storage. An important challenge is to protect plants during growth and development by applying innovative, environmentally friendly crop protection and stimulation products. Organomineral growth and development regulators were particularly popular. In the work schemes of application of perspective, organomineral growth regulators in conditions of forest-steppe of Western Siberia were tested and perfected. Their influence on the primary phases of growth and development of potatoes and their maturity, and their influence on biometrical parameters of plants, a phytosanitary condition of crops, a crop capacity, and its safety are established. On average, under the influence of growth regulators Epin-Extra and Zircon, the growing season is shortened by 3-5 days; the spread of diseases is reduced by 1.5-2 times; the yield increases to 8.3 tons per hectare. These studies are confirmed by the calculation of economic efficiency. Thus, the use of these growth regulators provides the level of profitability of production up to 252%.

The study aimed to test a multifunctional technology for potatoes’ biological protection using Phytop 26.82 against black scurf (Rhizoctonia solani Kuhn) and Colorado potato beetle in Western Siberia. The experiment was conducted with the medium-maturing variety “Kemerovchanin.” The product tested was Phytop 26.82. The research methodology was carried out both in laboratory conditions and in the field. In the laboratory, the biological product was used on potato leaves and Colorado potato beetle larvae. The authors revealed the degree of influence of the natural effect Phytop 26.82 on the Colorado potato beetle’s larvae of different ages. The larvae were counted on the 5th, 7th, and 10th days of the experiment. In the field, the authors also revealed the level of the immunogenic effect of the bioagent Phytop 26.82 on the Rhizoctonia stem canker (Rhizoctonia solani Kuhn). The morphological parameters of the Kemerovchanin potato variety were observed during the course of this study. The results of the study showed that the microbial mixture Phytop 26.82 made it possible to increase the biomass of plants by 1.5–1.8 times due to an increase in the length of the aerial part (by 10%), the number of stems (1.2–1.7 times), and the number of stolons (1.5–1.6 times) compared to control. Under the bioagent, Phytop 26.82, Rhizoctonia stem canker on the stems decreased by 45% overall counting weeks. The effectiveness of the bioagent Phytop 26.82 reached 100% in two aspects. One of them was the effectiveness of a biological product in the Colorado potato beetle’s obliteration (Leptinotarsa decemlineata). The second direction of significance was the fight against the black scurf. The use of a mixture of bioagents of the Phytop 26.82 preparation can simultaneously have an insecticidal, fungicidal, and growth-stimulating effect on potatoes.

This paper discussesthe results findings on the effect of nitrogen fertilizers as urea-ammonia liquor (KAS-32) and ammonium nitrate of various application rates (40,80 and 120 kg of primary nutrient per ha) on the quality of tomato fruits grown on the field and under cover.Various research methods were tested. They made it possible to identify biologically active substances of tomato fruits which helped to examine fruit chemical composition of experimental vari-eties with the determination of dry solids, total sugar, vita-minC, total acidity, lycopene and nitrates. It was found that under cover, the application of nitrogen-containing fertiliz-ers increased dry solids by an average of 23-25%, total sugar -by 55-61%, vitamin C -by 33-41% as compared to the control. On the field, the dry solids content increased by 35-45%, total sugar -by 74-83% and vitamin C -by 37-42%. However, the application of the maximum rates of N120fertilizer decreased dry solids content by 5-6% as compared to N80. At the same time, there was an increase of fruit total acidity as compared to the control: up to 32% under cover, and up to 16% on the field. Although as sugar content increased, the acidity had almost no effect on the eating qualities. In all variants, the nitrate content did not exceed themaximum permissible concentration. The ob-tained data confirmed the positive effect of certain rates of nitrogen-containing fertilizers on the structure, quality and safety of the obtained tomatoes. This result will make it possible to recommend the testedmethods and rates of fertilization during the growing season.

Ресурсосберегающие технологии в земледелии, агрохимии, селекции и семеноводстве Resourse-saving technologies in agriculture, agrochemistry, selection and seed production

In the article experience of application of various organomineral growth stimulants on potatoes in the conditions of forest-steppe of Western Siberia is stated. In the course of work, the authors used new perspective preparations whose application has an essential influence on growth, development, the structure of a crop, and potato productivity. As a result of work, it has been established, that organomineral growth stimulants slightly influence the duration of the vegetation period of potatoes (1-3 days). The authors found that the infestation and spread of diseases in potato crops depended to a greater extent on the conditions of the year and the preparations used, and to a lesser extent on the variety. On average, the overall degree of plant infestation on the treated background was 2-8 % lower compared to the control. The use of organomineral growth regulators has a positive effect on potato yields. The Epin-Extra preparation was the most effective, application of which provided up to 8.3 t/ha yield increase at tubers treatment, and up to 7.2 t/ha at vegetative plants treatment. The use of organomineral growth regulators does not have a significant impact on quality indicators of potatoes, as the difference between the variants was not more than 1 %.