Soil- and plant-based countermeasures to reduce Cs-137 and Sr-90 uptake by grasses in natural meadows: the REDUP project
Vidal, M × Camps, M Grebenshikova, N Sanzharova, N Ivanov, Y Vandecasteele, Carlo Shand, C Rigol, A Firsakova, S Fesenko, S Levchuk, S Cheshire, M Sauras, T Rauret, G #
Elsevier sci ltd
Journal of environmental radioactivity vol:56 issue:1-2 pages:139-156
The effectiveness of a set of soil- and plant-based countermeasures to reduce Cs-137 and Sr-90 transfer to plants was tested in natural meadows in the area affected by Chernobyl fallout. Countermeasures comprised the use of agricultural practices (disking + ploughing, liming and NPK fertilisation), addition of soil amendments and reseeding with a selection of grass species. Disking + ploughing was the most effective treatment, whereas the K fertiliser doses applied were insufficient to produce a significant increase in K concentration in soil solution. The application of some agricultural practices was economically justifiable for scenarios with a high initial transfer, such as Cs-137-contaminated organic soils. The use of soil amendments did not lead to a further decrease in transfer. Laboratory experiments demonstrated that this was because of their low radionuclide sorption propertius. Finally, experiments examining the effect of plant species on radionuclide transfer showed that both transfer and biomass can depend on the plant species, indicating that those with high radionuclide root uptake should be avoided when reseeding after ploughing. (C) 2001 Elsevier Science Ltd. All rights reserved.