【摘要】 利用核素示踪技术为研究土壤侵蚀开辟了新的途径,特别是7Be半衰期较短、仅分布于地表几厘米范围内、和土壤颗粒紧密结合等特点,使得其具备了评估短期内地表利用状况改变、水土保持措施等人为活动对地表土壤迁移的影响程度的潜能。介绍了7Be含量平衡方法在短期内土壤侵蚀估算中的应用,指出了该方法的一些不足,并展望了其应用前景。更多还原

【Abstract】 It opens a new way for soil erosion study by using the technique of nuclein tracer technique.7Be has the characteristics of shorter semi-declining period, distributed only within centimeters of the surface and soil particle closely integrated, possessing the potential of evaluating the degree of influence of human activities of changed surface utilization and soil and water conservation in a short-period to the surface soil transfer. It introduces the application of 7Be equilibrium method to the estimation of short-term soil erosion, points out deficiencies of the method and prospects the future of its application.更多还原