Dry deposition of ammonia around paddy fields in the subtropical hilly area in southern China

作     者：YI Yuchen SHEN Jianlin YANG Chaodong WANG Juan LI Yong WU Jinshui YI Yuchen;SHEN Jianlin;YANG Chaodong;WANG Juan;LI Yong;WU Jinshui

作者机构：College of Horticulture and GardeningYangtze UniversityJingzhouChina Key Laboratory of Agro-ecological Processes in Subtropical RegionsInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina Changsha Research Station for Agricultural&Environment MonitoringInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2020年第13卷第3期

页      面：216-223页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：This research was supported by the National Natural Science Foundation of China[grant number 41771336],the National Key Research and Development Program of China[grant number 2016YFD0201204] the Youth Innovation Promotion Association of the Chinese Academy of Sciences[grant number 2017418] 

主　　题：Ammonia dry deposition nitrogen deposition ammonia volatilization paddy field 

摘      要：This study measured the ammonia(NH3)concentration and dry deposition within 100 m around paddy fields(0.6 ha)with double rice cropping in the subtropical hilly area in southern China,with the aims to quantify the dry deposition of NH3 around the emission source and to clarify its temporal and spatial *** results showed that high NH3 concentrations were found during the 15 d after nitrogen(N)fertilizer application at downwind sites within 100maround the paddy fields,and the NH3 concentrations were 12–62,2.8–7.3,13–38,and 4.9–36μg N m−3 during the 15 d after basal fertilizer application and topdressing in the early rice season and after basal fertilizer application and topdressing in the late rice season,*** NH3 concentrations were relatively low(1.5–-3.8μg N m−3)during other periods of the rice season at the downwind sites,which indicated that N fertilizer application in paddy fields highly affected the NH3 concentration at downwind *** NH3 concentrations at the downwind sites decreased significantly with the increase in distance from the paddy *** total NH3 dry deposition around 100 m of the paddy fields accounted for approximately 79%and 81%of the emitted NH3 from the paddy fields in the early and late rice seasons,*** results indicate that dry deposition of NH3 around emission sources may be an important way to remove the NH3 volatilized from croplands in this subtropical hilly area.