Effectiveness of PhosAgro NPK and Gumiton under cultivating potatoes in radioactive soil contamination conditions

Based on the results of three-year production tests, the effectiveness of the use of PhosAgro NPK complex fertilizer and a new organ-mineral complex based on Gumiton peat in potato cultivation technologies on radioactively contaminated sod-podzolic soils in the Novozybkovsky district of the Bryansk region was assessed. Soils differed in the level of fertility and in the density of ¹³⁷Cs pollution. It was shown that leaf treatment of 1 l/ha Gumiton plantings in the potato budding phase without fertilizer contributed to a 19 – 58% increase in tuber yield relative to control, depending on the year. The introduction of PhosAgro NPK fertilizer at a dose of 0.5 t/ha ensured an increase in potato yield by 22 – 42% relative to the control. The joint use of fertilizer and the drug increased the tuber harvest by 12 – 19%, compared to the PhosAgro NPK variant and by 37 – 68% relative to control. The multiplicity of the decrease in ¹³⁷Cs intake into tubers during the treatment of potato plantings with Gumiton was up to 6.4 times in relation to the control, with the combined use of the drug and fertilizer – up to 3.4 times in comparison with the PhosAgro NPK variant. The use of Gumiton and PhosAgro NPK guaranteed the production of potato tubers with ¹³⁷Cs content in accordance with SanPiN 2.3.2 standards. 2650-10. The use of the Gumiton organic-mineral complex and PhosAgro NPK complex fertilizer for production of regulatory clean potato products should be recommended on radioactively contaminated sod-podzolic soils of the Bryansk region.