TANG Xiang-yu,YANG Hao,ZHAO Qi-guo,et al.Preliminary Estimate of Soil Erosion Rate on Red Soil Developed From Red Sandstone Using 137Cs Measurements[J].Research of Soil and Water Conservation,2002,9(01):121-125.
红砂岩母质红壤侵蚀作用的137Cs法初步研究
- Title:
- Preliminary Estimate of Soil Erosion Rate on Red Soil Developed From Red Sandstone Using 137Cs Measurements
- Keywords:
- 137Cs technique; Haplic red soil; soil erosion; red soil
- 分类号:
- S157.1;TL99
- 摘要:
- 不合理的开发和利用所导致植被覆盖的破坏严重，致使红砂岩母质地区长期以来遭受到强烈的土壤侵蚀。采用137Cs技术，研究红砂岩发育的红壤典型小流域的土壤侵蚀作用。结果表明：该流域的137Cs基准值为2014Bqm-2；对于非耕作土壤而言，137Cs在土壤剖面中呈峰值型分布，最大分布深度约为15cm；对于耕作土壤而言，则在耕作层内呈均一分布，耕作层以下则急剧下降。典型断面研究表明，上坡部坡耕地的侵蚀作用强于下坡部，且山顶面积较小的耕地的侵蚀作用比面积较大的坡顶耕地要大。总体而言，坡耕地的流失是相当严重的。
- Abstract:
- The destruction of vegetational cover in the region developed from red sandstone results in severe soil erosion. 137Cs technique was used to investigate soil erosion occurred within a small catchment developed from red sandstone. The local 137Cs reference inventory was determinated to be 2 014 Bq m-2.137Cs exhibits peak vertical distribution in uncultivated soils, with a maximum vertical distribution depth less than 15 cm. However, it is uniformly distributed within the plough layer, and decreases sharply in activity below the plough layer. Typical transects case study shows that soil erosion rates on the upper sloping farmland is usually higher than that on the lower sloping farmland, and soil loss from cultivated land on the crest with a relatively small total area is usually higher than that with a relatively large total area. Generally, soil erosion on the sloping farmland is severe.
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备注/Memo
收稿日期:2001-11-20。
基金项目:国家重点基础研究发展规划项目；（G1999011801）；国家自然科学基金（49973027）；中国科学院院长特别资助基金；中国科学院红壤生态实验站基金资助项目
作者简介:唐翔宇，男，（1972- ），现为中国科学院南京土壤研究所在读博士生，主要从事土壤侵蚀示踪研究.