TECHNIQUES FOR BIOLOGIZING POTATO GROWING TECHNOLOGY IN KARELIA

Abstract

The results of the study of various methods of application (precursor, siderate, introduction of only aboveground biomass into the soil) are presented lupine narrow-leaved Lupinus angustifolius L. in the cultivation of medium-early varieties of potatoes Nevsky and Sante. The use of lupin contributes (by increasing the linear indicators and the number of plant stems) to an increase in the yield of tubers: large and small fractions of the Nevsky variety, medium and small — Sante. Compared with the control monoculture of the Nevsky variety (20.7 t/ha), the greatest yield increases were obtained when cultivating lupine as a precursor (8.8) and siderate (7.4 t/ha). The Sante variety turned out to be less responsive to the studied fertilizer methods: relative to the control (12.9 t / ha), the best options were for applying aboveground lupine biomass to the soil and growing it for siderates (yield increases corresponded to 2.9 and 2.5 t/ha). Varietal sensitivity was also manifested in the unequal incidence of tubers with common types of scab after winter storage of the crop. In comparison with the monoculture, a decrease in the incidence of silver scab tubers of the Nevsky variety after using lupin as a precursor and siderate, scab — introducing only green mass into the soil, and Sante varieties with black scurf and scab in all variants of the experiment with the use of lupin was found.