High Plant Uptake of Radiocesium from Organic Soils Due to Cs Mobility and Low Soil K Content

摘要: Post-Chernobyl experience has demonstrated that persistently high plant transfer of 137Cs occurs from organic soils in upland and seminatural ecosystems. The soil properties influencing this have been known for some time but not quantified. A pot experiment was conducted using 23 collected selected areas Great Britain, which were spiked with 134Cs, Agrostis capillaris grown 19−45 days. plant-to-soil 134Cs concentration ratio (CR) varied 0.06 to 44; log CR positively correlated matter content (R 2 = 0.84), values highest low distribution coefficients (Kd) 134Cs. Soils contents concentrations NH4+ solution showed mobility (low Kd). decreased sharply increasing K+. two parameter linear model, used predict K+ Kd, explained 94% the variability values. In conclusion,...