The effectiveness of long-action fertilizer Suprodit-M and organo-mineral complex Geoton in the cultivation cereals in conditions of radioactive pollution

New experimental data on long-action of fertilizer SUPRODIT-M to limit uptake of 137Cs from contaminated soils into barley plants were obtained. In a year after using SUPRODIT-M on sod-podzol sandy soil, the yield of grain increased 2.2 times in comparison with the control (without fertilizers). The application of SUPRODIT-M during the 2nd year of experiment led to the reduction in the 137Cs in grain of barley in 2.0 times in comparison with the application of mineral fertilizers. The coefficient of 137Cs accumulation by the grain when SUPRODIT-M is applied is 2.5 times lower than in the variant with azofoska. The after effect of SUPRODIT-M in reducing 137Cs accumulation in the barley crop is associated with a decrease in the number of easily accessible forms of 137Cs in soil by 17% in comparison with the control group. A close positive correlation between the 137Cs grain sum of exchange and mobile forms 137Cs in the variants with SUPRODIT-M (r=0.88) is stated. Tests of SUPRODIT-M and organo-mineral complex GEOTON, under the conditions of vegetative experiment at cultivation of spring wheat on sod-podzol sandy soil showed that by application of SUPRODIT-M the grain yield was 48% higher, than in option with azofoska. The application of GEOTON on growing plants of wheat led to an increase of grain yield by 12-29% in comparison with the options without this application depending on soil fertility. The application of SUPRODIT-M allowed to obtain grain with the content of 137Cs in 1.25-1.7 times less than when using mineral fertilizers. The efficiency of SUPRODIT-M reduction in 137Cs transfer from soil to wheat by the application of GEOTON was 1.3 times higher than azofoska.