AGROECOLOGICAL BASES OF POTATO CULTIVATION IN TAIGA OF THE OB-IRTYSH NOR

Importance of the potato as a staple food markedly increases in the Ob North. The urgency of the issue is determined by the existing climatic and environmental features, and their conditions. In this regard, the objective is to study ways of improving the fertility of podzolic soils with usage of liming, using of organic fertilizers, methods and timing of tillage [1]. In recent years, interest in the use in crops of different growth factors, that can significantly strengthen the physiological and biological processes in plant tissues and, thus, affect the yield and quantity of production has increased due to the sharp rise in prices for mineral fertilizers. [2, 3] The studies were carried out at Yugra State University. The soil of experimental plot was podzolic, and argillaceous by its mechanical composition. The results showed that the use of dolomite powder under the potato has brought a reduction in all types of soil acidity. Organo-mineral system of fertilizers and liming significantly affect the improvement of nutrient status of the soil. Such method of tillage as spring plowing + spring ridge tillage + planting in ridges had a positive impact on tuber yield and its quality. Potato yield strongly depends on doses of manure and norms of liming. This is determined by the basic parameters of photosynthetic activity of crops. The content of dry matter, starch and vitamin C, as well as the infestation of tubers with potato scab depends not only on the system of fertilizers and liming, but also on the prevailing agro-ecological conditions of vegetation. Thus, the agroecological basis of the technology is tillage + spring plowing with subsequent ridge tillage and planting in ridges. Optimal planting density is 71.5 thousand tubers per hectare. Liming, placement of organomineral fertilizer improves agrochemical properties of the soil, thus creating conditions favorable for the growth and development of potato plants, which ultimately affects the increase in yield of tubers and tuber quality. Keywords: The method and timing of tillage, organic-mineral system of fertilizers and liming, soil fertility, productivity of potatoes.