中文摘要：

大气氮沉降作为营养源和酸源，沉降数量的急速增加，将严重影响生态系统的生产力和稳定性，对农田生态系统的影响日益显现。本文简要介绍了大气氮沉降的概念、来源和研究方法，梳理了近年来我国红壤区大气氮沉降的形态、数量及其对农田生态系统的影响，提出了红壤农田生态系统大气氮沉降当前存在的问题及今后的发展趋势。

英文摘要：

An important source of plant nutrient and soil acidification, increased N deposition from the atmosphere will greatly impact the production and stability of global terrestrial and aquatic ecosystems. This paper introduced the concepts, sources and methods of atmospheric nitrogen deposition and reviewed recent literatures on the forms and amounts of atmospheric nitrogen as well as its ecological effects on red soil agro-ecosystems. Finally, the existing problems and research trends of atmospheric nitrogen deposition were proposed in red soil agro-ecosystems.