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Variability of K-40 isotopic composition in forest soils under different environmental conditions
| Title: | Variability of K-40 isotopic composition in forest soils under different environmental conditions |
| Authors: | Fujiyoshi, Ryoko Browse this author →KAKEN DB | | Takekoshi, Naoki Browse this author | | Okamoto, Kazumasa Browse this author |
| Keywords: | K-40 isotopic composition | | Depth distribution | | Carbonaceous soil | | Volcanic soil | | Soil organic matter |
| Issue Date: | Mar-2014 |
| Publisher: | Springer |
| Journal Title: | Journal of Radioanalytical and Nuclear Chemistry |
| Volume: | 299 |
| Issue: | 3 |
| Start Page: | 1365 |
| End Page: | 1371 |
| Publisher DOI: | 10.1007/s10967-013-2797-z |
| Abstract: | Radiopotassium isotopic composition (K-40/K, %) of several forest soils did not show a constant value of generally known 1.17 x 10(-2) %, but they were varied significantly from 0.4 x 10(-2) to 1.3 x 10(-2) % at different locations under different environmental conditions. Surface portion of a soil (2-4 cm in depth) gave always lower K-40/ K values compared with those of deeper soil layer (35-40 cm in depth). Ion exchange of K+ with NH4+ did not affects the K-40/K value in any soils, which revealed with chemical leaching experiments in the laboratory. Some plant species showed much lower K-40/K values than those in the surface soil. Possible reasons for varying K-40/K values obtained in this study may result from a dynamic behavior of potassium in soil, probably due to biological activity including root uptake and decomposing soil organic matter by microorganisms in the forest floor. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/56346 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤吉 亮子
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