| 7Be在坡面土壤侵蚀中应用的研究进展 |
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| 引用本文： | 李立青,杨明义,刘普灵. 7Be在坡面土壤侵蚀中应用的研究进展[J]. 水土保持通报, 2003, 23(2): 69-72 |
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| 作者姓名： | 李立青 杨明义 刘普灵 |
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| 作者单位： | 中国科学院水土保持与生态环境研究中心,西北农林科技大学,水土保持研究所,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目资助(40071059) |
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| 摘 要： | 7Be是自然界产生的一种放射性核素,半衰期为53.3d,通过干湿沉降到达地表,被土壤颗粒强烈吸附,随土粒的迁移而发生再分布,因此可作为土壤侵蚀的示踪剂。本文就将7Be目前在土壤侵蚀研究中的应用现状做了介绍,并对今后利用7Be示踪土壤侵蚀提出了建议。
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| 关 键 词： | 7Be 土壤侵蚀 定量模型 |
| 文章编号： | 1000-288X(2003)02-0069-04 |
| 收稿时间： | 2002-05-10 |
| 修稿时间： | 2002-05-10 |
Advance of 7Be as A Tracer in Studying Sloping Erosion |
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| LI Li-qing,YANG Ming-yi and LIU Pu-ling. Advance of 7Be as A Tracer in Studying Sloping Erosion[J]. Bulletin of Soil and Water Conservation, 2003, 23(2): 69-72 |
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| Authors: | LI Li-qing YANG Ming-yi LIU Pu-ling |
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| Affiliation: | Research Center of Soil and Water Conservation;Eco-environment, Chinese Academy of Sciences;Institute of Soil and Water Conservation and Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, Shaanxi Province, China |
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| Abstract: | Beryllium-7 is environmental or fallout radionuclide with a half-life of 53. 3 days, which is produced primarily by the bombardment of the earth atmosphere by cosmic rays. It is subsequently transported into the soil surface by wet and dry deposition. It is rapidly and strongly absorbed by soil particles and redistributes with soil particles. Therefore, it can be used as a tracer for studying soil erosion. The recent progress in the use of the environmental radionuclide beryllium-7 (7Be) for investigating rates of soil erosion and deposition is introduced, and suggestions for applying it into soil erosion are proposed. |
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| Keywords: | 7Be soil erosion quantitative model |
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