Abstract
In soil redistribution studies employing 7Be, the radionuclide inventories and their spatial uniformity in soil can be influenced by the crop coverage conditions. A relatively high 7Be interception factor, normalized to the leaf area index (LAI), of 0.61 ± 0.08 (LAI value 0.87 ± 0.06) was determined after 0.4 mm precipitation. After a second 7.2 mm rainfall, the interception factor had a value of 0.36 ± 0.04, for 0.30 ± 0.02 LAI value. Wash-off experiments with deionized water showed that the released 7Be fraction was limited within a range of 29–37 % of the initial concentration of leaf deposit.
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Acknowledgments
This research is a follow-up contribution to the IAEA Coordinated Research Project D.1.20.11: ‘Integrated isotopic approaches for an area-wide precision conservation to control the impacts of agricultural practices on land degradation and soil erosion’. The authors acknowledge the support provided by Mr. Minh-Long Nguyen and Mr. Manfred Groening at the different stages of the project. The help of Mr. Arsenio Toloza during sample collection and handling is much appreciated.
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Iurian, AR., Dercon, G., Adu-Gyamfi, J. et al. The interception and wash-off fraction of 7Be by bean plants in the context of its use as a soil radiotracer. J Radioanal Nucl Chem 306, 301–308 (2015). https://doi.org/10.1007/s10967-015-3948-1
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DOI: https://doi.org/10.1007/s10967-015-3948-1