稀土元素示踪法在土壤侵蚀与泥沙来源研究中的应用  

Application of Rare Earth Element Tracer in the Research of Soil Erosion and Sediment Source

作　　者：张加琼 尚月婷[1] 白茹茹 殷敏峰 党真 杨明义 肖海[4,5] ZHANG Jiaqiong;SHANG Yueting;BAI Ruru;YIN Minfeng;DANG Zhen;YANG Mingyi;XIAO Hai(State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Northwest A&F University,Yangling,Shaanxi 712100,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and ministry of Water Resources,Yangling,Shaanxi 712100,China;University of Chinese Academy of Sciences,Beijing 100864,China;Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,ministry of Education,Yichang,Hubei 443002,China;College of Civil Engineering&Architecture,China Three Gorges University,Yichang,Hubei 443002,China)

机构地区：[1]西北农林科技大学、水土保持研究所、黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100 [3]中国科学院大学,北京100049 [4]三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [5]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《水土保持研究》2023年第3期55-61,共7页Research of Soil and Water Conservation

基　　金：国家自然资助项目(4207071519,42277323);土木工程防灾减灾湖北省引智创新示范基地(2021EJD026)。

摘　　要：[目的]掌握稀土元素(REE)示踪土壤侵蚀和泥沙来源的方法,明确其不确定性来源,对正确运用该方法获得可靠的侵蚀速率和泥沙源地贡献结果具有重要意义。[方法]基于前人运用REE示踪土壤侵蚀速率和泥沙来源的研究成果,总结了REE示踪土壤侵蚀的基本技术路线及其在水蚀、风蚀和泥沙来源研究中的应用,探讨了REE示踪土壤侵蚀和泥沙来源研究中的不足。[结果]分析认为REE虽是理想的示踪剂,但REE示踪法仍存在影响示踪土壤侵蚀和泥沙来源准确性的关键方面需要改进,包括REE与土壤结合方式与机理、长期监测或复杂环境下随淋溶、径流的迁移以及植被吸收利用等。在未来研究中应重点关注大量释放REE对土壤、植物、环境健康的影响以及REE示踪法与复合指纹识别法的结合运用等。[结论]研究结果为提高REE示踪土壤侵蚀结果的准确性,运用该方法开展其他侵蚀类型研究,与复合指纹识别法结合辨别大区域的泥沙来源奠定基础。[Objective]Understanding the tracing approach of rare earth elements(REE)in soil erosion and sediment source identification,and clarifying their uncertainties are important to obtain robust quantification results of soil erosion and sediment source.[Methods]The soil erosion technical route using REE and its application progress in water and wind erosion quantification,and sediment source identification were summarized based on previous results,as well as the deficiencies of REE tracing.[Results]REEs are considered as the ideal elements used to trace soil erosion,however,there are still key aspects that affect the accuracy of erosion and sediment source estimation results from REE tracing,including the combination methods and mechanisms of REE to soil particles,REE transport through leaching and runoff and plant absorption and utilization in long term studies.Therefore,key aspects that researchers should focus on in the future were proposed.It is also urgent to clarify the impact of massively released REE on the health of soils,plants and environments.Additionally,sediment source identification combined with the optimal fingerprinting approach should be further explored.[Conclusion]The results of this study are valuable for improving the accuracy of the REE tracing technique,expanding application of REE tracing technique to other erosion types in addition to water erosion,and using REE tracing technique in combination with the composite fingerprinting approach to identify sediment source in relatively large areas.

关 键 词：稀土元素示踪 土壤侵蚀 泥沙来源 侵蚀示踪 粒度效应 

分 类 号：S157.1[农业科学—土壤学]