Transfer pathways of ~54Mn, ~57Co, ~85Sr, ~103Ru and ~134Cs in rice and radish plants directly contaminated at different growth stages

摘要

In order to study radionuclide transfer pathways related to direct contamination of plants, the above-ground parts of rice and radish plants were sprayed with a solution containing ~54Mn, ~57Co, ~85Sr, ~103Ru and ~134Cs in a greenhouse at 5 or 6 different times. Showing little difference among radionuclides, the interception factor increased as plants grew to maturity. Its highest observed value was 0.94 in rice and 0.83 in radish. Weathering losses of the intercepted activity by harvest were 32-89/100 In rice and 32-85/100 in radish depending on application time and radionuclide.