CD and CO effects on the dynamics of 137Cs accumulation by barley in ontogenesis

The paper presents data from studying the influence of heavy metals on 137Cs accumulation in bio-mass and grain of spring barley, Elf variety. The presence in soil of Co and Cd at doses 20 and 25 times above the maximum permissible concentrations for soddy-podzolic medium loam soils is shown to reduce the radionuclide transfer to barley plants in ontogenesis. It has been found that at the early stages of barley development the inhibition value for 137Cs absorption rate due to application of heavy metals to the soil was slightly lower or comparable with the depressing effect of these chemical elements on the gain rate in plant biomass, which has caused a reduced transfer of the radionuclide with the barley yield.