中文摘要：

氮素是陆地水体的重要污染物之一，相邻高地土壤中的氮素经非点源途径通过河岸带进入水体．河岸带是高地和水体之间的过渡带，健康的河岸带系统能够通过物理的、生物的和生物化学的过程，实现对氮素的截留转化．本文系统地介绍了氮素进入陆地水体的主要途径和河岸带对陆地水体氮素污染物截留转化的机制，并从河岸带水文过程、土壤特征、植被状况、人为活动等方面，论述了影响河岸带氮素截留转化作用的因素；在此基础上，对目前河岸带研究中存在的问题进行了讨论，并对我国开展河岸带的研究提出了建议．

英文摘要：

Highland soil nitrogen can enter adjacent water body via erosion and leaching, being one of the important pollutants in terrestrial water bodies. Riparian buffer zone is a transitional zone between highland and its adjacent water body, and a healthy riparian buffer zone can retain and transform the incoming soil N through physical, biological, and biochemical processes. In this paper, the major pathways through which soil nitrogen enters terrestrial water body and the mechanisms the nitrogen was retained and transformed in riparian buffer zone were introduced systematically, and the factors governing the nitrogen retaining and transformation were analyzed from the aspects of hydrological processes, soil characters, vegetation features, and human activities. The problems existing in riparian buffer zone study were discussed, and ,some suggestions for the further study in China were presented.