Environmentally-friendly technology of Jerusalem artichoke cultivation using non-root nutrition with complex fertilizers

The paper discusses the results obtained in a two-factor field experiment on sod-podzolic soil of the Central Non-Black Earth Region (the Tver Region) in 2021-2023. The experiment studied complex fertilizers for non-root nutrition (Factor A): Akvarin 3, Akvarin 5, Folirus Premium, Gumat +7, control - water, consumption of working fluid - 300 l/ha, and the method of application (Factor B): one non-root nutrition applied at a plant height of 10-15 cm, two feedings applied at a height of 10-15 and 40- 50 cm. The accounting area of the plot for Factor A is 29.4 m2, for Factor B it is 14.7 m2. The experiment was replicated fourfold. The object of the research is the early ripening variety «Skorospelka». It was found that non- root nutrition increased the yield of top mass by 36.4-41.4%, tubers - by 49.1-65.8%. They reduced water consumption coefficients: biological ones by 35.9-39.3%, commercial ones by 31.6-36.9%. The increase in yield was achieved due to the enhancement of growth processes, photosynthetic activity, and a decrease in water consumption per yield unit. Plant height (r = 0.892; 0.924; 0.921) and leaf photosynthetic potential (r = 0.678; 0.714; 0.741) are in the strongest direct positive relationship with productivity indicators (top mass, tubers, raw phytomass). The most cost-effective options for Jerusalem artichoke cultivation technology are: with a single additional feeding with Akvarin 3 or Folirus Premium, and with a double additional feeding with Gumat +7. The profitability of production compared to the control increased by 104.8-106.9 and 131.9 abs. %.