Ammonia should be considered in field experiments mimicking nitrogen deposition

Atmospheric and Oceanic Science Letters

Xuejun LIU¹  Wen XU¹  Xiaying ZHU²  Dianming WU³  Yunting FANG⁴  Shili TIAN⁵  Chunyan LIU⁵  Yuepeng PAN⁵  Yuesi WANG⁵  Dejun LI⁶  Lei DUAN⁷ 

[1] China Agricultural University;China Meteorological Administration;East China Normal University;Institute of Applied Ecology, Chinese Academy of Sciences;Institute of Atmospheric Physics, Chinese Academy of Sciences;Institute of Subtropical Agriculture, Chinese Academy of Sciences;Tsinghua University;

关键词: nitrogen deposition;    wet deposition;    dry deposition;    ammonia;    air pollution;   

DOI  :  10.1080/16742834.2020.1733919

来源: DOAJ

【 摘 要 】

Excess nitrogen deposition has significant impacts on water eutrophication, soil acidification, eleveted greenhouse gas emissions, and biodiversity loss. These impacts mostly derive from conventional manipulative experiments in the field by adding nitrogen solution directly onto grassland or forest floors. For forest ecosystems, previous field experiments have usually ignored the nitrogen cycles in the canopy, which are important in responses to airborne nitrogen input. Although whole-forest canopy nitrogen fertilization has recently been conducted to promote our understanding of nitrogen deposition processes, spraying nitrogen solution onto plants still largely ignores the dry deposition of ammonia (as well as other gaseous reactive nitrogen species). To date, there have been a limited number of field studies that have investigated the bi-directional exchange of ammonia between the atmosphere and plants, not to mention the impacts of ammonia on natural ecosystems. Due to the increasing trend of atmospheric ammonia concentrations worldwide and its dominant role in nitrogen deposition and haze pollution, the next generation of experiments should mimick nitrogen deposition on natural ecosystems by further considering the dry deposition of ammonia.

【 授权许可】

Unknown