Impact of New Complex Organo-Mineral Fertilizers on Maize Productivity and Translocation of 137Cs in Plants
A comparative assessment of the new complex organic and mineral fertilizer SUPRODIT-M, organo-mineral complex GEOTON and mineral fertilizers effect on forms of 137Cs in gray forest soil, the maize productivity and the intake of the radionuclide from the soil to the plant in vegetative experience was given. It was shown that application of SUPRODITE-M contributed to a 27% reduction of the exchange and mobile forms of 137Cs in the soil and to a 9% increase in the proportion of the fixed form. It also resulted in a vegetative mass yield increase of 38% and 1.6-1.7 times decrease in 137Cs in the vegetative mass of maize in comparison with different mineral fertilization treatments. The accumulation coefficient of 137Cs in the vegetative mass of maize for the treatment with SUPRODITE-M was 1.2-2.8 times less than for the other experimental treatments. Application of GEOTON on plants resulted in 1.3 times decrease of 137Cs accumulation in the vegetative mass of maize on the background of mineral fertilizers or SUPRODIT-M application as compared with the control treatments. Application of SUPRODIT-M and GEOTON provided 1.3 and 2.8 times decrease of 137Cs accumulation coefficient in comparison with 137Cs + SUPRODIT-M and 137Cs + GEOTON treatments and 3.5 times decrease in comparison with the control (137Cs).