The efficiency of the complex slow-release fertilizer Supradit-M and organic and mineral complex Guiton by carrots cultivation under the conditions of radioactive contamination

According to the results of the vegetation experiment on soddy podzolic soil, new experimental data were obtained on the prolonged action of complex organic and mineral fertilizer SUPRODIT-M to limit the intake of 137Cs from radionuclide-contaminated soils in carrot roots. A year after applying SUPRODIT-M into the soddy podzolic sandy loam soil the root mass increased by 11% and vegetative mass by 89% compared with control (without fertilizers), respectively. The nitrate content in the roots when the aftereffect SUPRODIT-M was 55% lower than the annual application of mineral fertilizers. Treatment of vegetative plants of carrots with the organic and mineral complex GUMITON after the effect of SUPRODIT-M contributed to the increased yield of root crops by 45% in comparison with the variant without spraying the drug. The nitrate content in the roots when using GUMITON on the background of mineral fertilizers decreased by 46%. A year after applying SUPRODIT-M, the content of 137Cs in the roots decreased 6.4 times in comparison with the control group. The multiplicity of reduction of 137Cs in the aftereffect of azophoska was only 2.4 times. Application of GUMITON on the background of an annual soil application of mineral fertilizers decreased the activity of 137Cs in the roots of carrots 1.25 times. The efficiency of SUPRODIT-M containing the integrated adsorbent with high absorption capacity in reduction of 137Cs accumulation in the roots of carrots, was 2.4 times higher than azofoska. It was shown that SUPRODIT-M was a agroameliorant of slow release, contributing to the growth of productivity of carrots on soddy podzolic soils and improving the quality of roots and reducing the radionuclides transferred from the soil to plants.