一种新型土壤侵蚀磁性示踪剂的研制  

Developing a Man-Made Magnetic Tracer to Study Soil Erosion

作　　者：董元杰[1] 马玉增[1] 陈为峰 史衍玺[2] 

机构地区：[1]山东农业大学资源与环境学院,山东泰安271018 [2]莱阳农学院资源与环境学院,山东青岛266109

出　　处：《水土保持学报》2007年第5期46-49,共4页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(40701094);山东农业大学青年科技创新基金项目(23457);山东省教育厅科技计划项目

摘　　要：本研究利用粉煤灰、水泥和水作为原料，按照质量比为4：2：1的比例，制造了一种粒度宽泛的与土壤性质相近的人工磁性示踪剂，并在利用人工降雨对5°坡度、不同雨强和不同示踪剂施用浓度下对人工示踪剂的性质和使用方法进行了研究，试验结果表明：该示踪剂的理化性质与土壤接近，在施用浓度为5％～10％、深度是5cm的条件下，示踪剂的可蚀性与土壤最为接近，在此条件下，人工示踪剂可以通过降雨侵蚀前后土壤磁化率的增大或减小来反映坡面不同空间部位土壤发生沉积或遭受侵蚀。In this study, we made a new type soil magnetic tracer using fly ash, cement and water which ratio is 4 ： 2 ： 1, and the physical and chemical characters of this man made magnetic tracer is similar with soil. Then, we check the tracer feasibility about using it to study slope soil erosion in laboratory simulate rainfall and field simulate rainfall condition using 5° slope degree and different rainfall intensity. The results of the experiment show that this tracer is feasibility being used to study slope soil erosion, when the using depth is 5 cm and the tracer concentration is 5 ~10%. And, the soil susceptibility variation can reflect the slope soil erosion variation using this tracer. When the soil susceptibility reducing, we can say this part is being eroded. But, we can say this part is being eroded, when the soil susceptibility adding.

关 键 词：土壤侵蚀 新型人工磁性示踪剂 模拟降雨 

分 类 号：S157.1[农业科学—土壤学]