Journal
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
Volume 63, Issue 1, Pages 1-14Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0265-931X(01)00131-X
Keywords
basket willows; caesium; contamination; energy forestry; potassium; radionuclides; strontium; transfer factor
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Agricultural areas in middle and northern parts of Sweden were contaminated with radionuclides after the Chernobyl accident in 1986. Alternative crops in these areas are biomass plantations with fast-growing Salix clones for energy purposes. The uptake and internal distribution of Cs-137 and Sr-90 in Salix viminalis were studied. Plants were grown in microplots under field conditions. The soils in the experimental site had been contaminated in 1961 with 35.7 and 13.4 M Bq m(-2) of Cs-137 and Sr-90, respectively. The experiment was carried out during three years. The plots were fertilised with 60 kg N ha(-1) and three treatments of K, consisting of 0, 80 and 240 kg K ha(-1), during the first two years. The activity concentration of Cs-137 in the different plant parts varied between 140 and 20,000 Bq kg(-1) and was ranked in the following order: lowest in stems
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