%0 Journal Article
%T Hourly Measurement on Aerosol NH3 and Gas NOx Emission in the Rice Field<br>稻田气溶胶NH3和气体NOx排放在线测定研究
%A GONG Wei-wei
%A LUAN Sheng-ji
%A <br>龚巍巍
%A 栾胜基
%J 环境科学
%D 2012
%I 
%X Aerosol NH3 and gas NOx are the major components in atmospheric particles and precipitation, which are key precursors to form aerosols. The intensive N fertilization in arable land is an important source of aerosol NH3 and gas NOx, which have not been well characterized yet. During May to October in 2010, the characteristics of aerosol NH3and gas NOx emission from rice field after urea application were investigated. The time resolutions of measurements were set to be one hour. The aerosol NH3 emission and metrological factors within 20 d of continuous sampling after fertilization in four experiments were monitored. The experiment on gas NOx emission and metrological factors influencing the emission were carried out from the beginning of the forth test, which lasted for 47 days. Results indicated that the aerosol NH3 emission factors of four tests were 2.6%, 5.5%, 4.0% and 1.6%, respectively. The corresponding aerosol NH3 emission flux of four tests were 3.97, 2.08, 1.52 and 1.22 kg·hm-2, respectively. Temperature (air temperature and soil temperature) was found to be the main factor influencing aerosol NH3 emission in rice fields after fertilization, while the impacts of air humidity and soil moisture were not clear. After analyzing the monitoring data, it can be concluded that the ratio of the emission amount of NO2-N and NO-N in rice fields after fertilization was 9/4; the emission factor and the emission flux of gas NOx were 0.14% and 0.30 kg·hm-2,respectively. The relationship between metrological factors and gas NOx emission flux was also examined.
%K aerosol NH3
%K gas NOx
%K rice field
%K emission flux
%K emission factor<br>气溶胶NH3
%K 气体NOx
%K 稻田
%K 排放通量
%K 排放因子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=4A820C74CDA0F615DFB5325CB676F613&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=708DD6B15D2464E8&sid=E1FBB67F1024CE87&eid=654215B54DC15EE9&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=32