中文摘要：

河流DON不但记录了流域侵蚀的过程,还记录着DON的生物地球化学信息,河流可溶性有机氮其流动是流域生态系统氮循环的重要组成部分。本文综述了河流可溶性有机氮的性质、来源、环境效应、时空变化以及同位素技术应用的最新研究进展,并指出今后河流DON的研究方向。

英文摘要：

Fate and transfer of the dissolved organic nitrogen（DON） in river plays an important role in the nitrogen cycling of river basin ecosystems.Biogeochemical processes of DON in river basin ecosystems have been modified intricately due to anthropogenic disturbances,that is,DON of rivers recorded not only the natural history of erosion but also biogeochemical characteristics of itself.This paper reviewed advances in the studies of DON＇s sources,properties,environmental effects,seasonal and spatial variations,and isotope technique applications.In addition,this paper brought some suggestions to the future studies.