中文摘要：

随着人类活动的加强,大气氮素沉降在逐渐增加,已对海洋和陆地生态系统产生了明显的影响。为此总结了大气干湿沉降中氮的组成和数量变化等特点,并在此基础上,分析评述了大气氮沉降对草地生态系统中植物、动物和微生物群落发展的影响,提出了今后研究的方向。

英文摘要：

Atmospheric nitrogen deposition is increasing with anthropic activities, and it has influenced both marine ecosystem and territorial ecosystem significantly. Variations of composition and amount of atmospheric nitrogen deposition were summarized and influences of atmospheric nitrogen deposition on the development of communities of plant, animal and microbes in grassland ecosystem were analyzed and summarized. The suggests related to the research work on atmospheric nitrogen deposition in grassland ecosystem was provided as well.