摘要
根据创立的土壤侵蚀定位土芯Ｅｕ示踪新方法，研究了红壤坡地不同土地利用方式下土壤侵蚀的垂直分布规律，介绍了新方法的产生背景和示踪原子选择、示踪用量估算、示踪实施、中子活化及侵蚀结果计算等技术要点，以及在红壤坡地雷竹园的部分应用结果。结果表明，新方法对以片蚀和细沟侵蚀为主的红壤坡地是适用的；在复合坡面，随坡面的陡、缓，土壤侵蚀表现强、弱或沉积，反映了坡地土壤侵蚀的垂直分布规律。
A new method, namely Fixed Soil Core Eu (europium) Tracer (FSCET), was founded to investigate spatial distribution of soil erosion in red soil sloping fields in different land use ways. Background and main technical points of the new method are introduced, such as choice of the tracer element, calculation of the tracer amount, trace implement, neutron activation analysis and calculation of the erosion results. The experimental results in bamboo field show that the new method is suitable for red soil sloping fields on which sheet erosion and rill erosion are main erosion forms; on the compound slope field, steep and gentle slopes appear strong, week erosion or deposition, which reflects the spatial distribution of soil erosion.
