USE OF BIOLOGICAL PRODUCTS IN POTATO CULTIVATION TECHNOLOGY IN THE CONDITIONS OF THE FOREST-STEPPE ZONE OF THE REPUBLIC OF NORTH OSSETIA-ALANIA

The article presents an assessment of the impact of processing modern biological products on the growth and development, yield and quality of potato varieties Farn and Nevsky in the soil and climatic conditions of its cultivation on leached chernozems of North Ossetia-Alania. The research was carried out at the experimental site of the Scientific Research Institute of Agricultural Sciences VNC RAS in the forest-steppe zone in the grass-field crop rotation. The soil of the experimental site contains 6.3% humus. The reaction of the medium is slightly acidic (pH sol. hoods - 5.48%). Leached chernozems are characterized by a high content of gross and available reserves of nitrogen and phosphorus. In terms of the content of mobile potassium, the soils are moderately secure. The subject of the research is the Biostim Universal growth regulator and the complex micronutrient Bomu. Biometric analysis of potato plants during the flowering phase showed the effectiveness of the applied biologics in comparison with the control variant. A significant increase was provided by (option IV) – the complex use of biological preparations by weight of tops up to 54.4 and 49.8%; foliage - 21; 19 pcs/ bush or 32.8; 29.2%, respectively. The applied biologics for all variants of the experiment are arranged according to the yield and quality of potato tubers, as follows: Biostim Universal at a dose of 0.5 l/ha + micronutrient Bom at a dose of 0.35 kg/ha (option IV), Bom (option III), Biostim Universal (option II) with a yield of 30.7t/ha according to the Farn variety (HCP05=2.6t/ha);29.4 and 28.9 t/ha, starch content of 13.4% (HCP05=0.2t/ha), 13.6 and 12.7%; Nevsky grade – 30.1 (HCP05=2.5 t/ha), 29.2 and 28.0t/ha; 12.9 (HCP05=0.1t/ha),12,8 and 13.0 respectively.