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Wet and dry nitrogen deposition in the central Sichuan Basin of China

机译：中国四川盆地中部的干湿氮沉降

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摘要

Reactive nitrogen (Nr) plays a key role in the atmospheric environment and its deposition has induced large negative impacts on ecosystem health and services. Five-year continuous in-situ monitoring of N deposition, including wet (total nitrogen (wTN), total dissolved nitrogen (wTDN), dissolved organic nitrogen (wDON), ammonium nitrogen (wAN) and nitrate nitrogen (wNN)) and dry (DNH3, DHNO3, (D)pN(4)(+), (D)pNO(3)(-) and DNO2) deposition, had been conducted since August 2008 to December 2013 (wet) and May 2011 to December 2013 (dry) in Yan-ting, China, a typical agricultural area in the central Sichuan Basin. Mean annual total N deposition from 2011 to 2013 was 30.8 kg N ha(-1) yr(-1), and speculated that of 2009 and 2010 was averaged 28.2 kg N ha(-1) yr(-1), respectively. Wet and dry N deposition accounted for 76.3% and 23.7% of annual N deposition, respectively. Reduced N ((w)AN, DNH3 and (D)pNH(4)(+)) was 1.7 times of oxidized N (wNN, DHNO3, DNO2 and DPNO3-) which accounted for 50.9% and 30.3% of TN, respectively. Maximum loadings of all N forms of wet deposition, gaseous NH3, HNO3 and particulate NH4+ in dry deposition occurred in summer and minimum loadings in winter. Whether monthly, seasonal or annual averaged, dissolved N accounted for more than 70% of the total. N deposition in the central Sichuan Basin increased during the sampling period, especially that of ammonium compounds, and has become a serious threat to local aquatic ecosystems, the surrounding forest and other natural or semi-natural ecosystems in the upper reaches of the Yangtze River. (C) 2016 Elsevier Ltd. All rights reserved.
机译：活性氮（Nr）在大气环境中起着关键作用，其沉积对生态系统的健康和服务产生了很大的负面影响。连续五年对氮沉积进行连续监测，包括湿（总氮（wTN），总溶解氮（wTDN），溶解有机氮（wDON），铵态氮（wAN）和硝态氮（wNN））和干燥态（ DNH3，DHNO3，（D）pN（4）（+），（D）pNO（3）（-）和DNO2）的沉积自2008年8月至2013年12月（潮湿）和2011年5月至2013年12月（干燥）进行）位于中国四川盆地中部典型的农业区烟亭。 2011年至2013年的年平均总N沉积量为30.8 kg N ha（-1）yr（-1），并推测2009年和2010年的平均N总沉积量分别为28.2 kg N ha（-1）yr（-1）。湿态氮和干态氮的沉积分别占年氮沉积的76.3％和23.7％。还原氮（（w）AN，DNH3和（D）pNH（4）（+））是氧化氮（wNN，DHNO3，DNO2和DPNO3-）的1.7倍，分别占TN的50.9％和30.3％。夏季，所有N形式的湿沉降，气态NH3，HNO3和颗粒状NH4 +的最大负荷在夏天发生，而最小负荷在冬天。无论是按月，季节还是年度平均值，溶解氮占总量的70％以上。在采样期间，四川盆地中部的氮沉积量增加，尤其是铵化合物的沉积量，已经严重威胁长江上游的当地水生生态系统，周围的森林以及其他自然或半自然生态系统。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Atmospheric environment》 |2016年第10期|39-50|共12页
  • 作者

    Kuang Fuhong; Liu Xuejun; Zhu Bo; Shen Jianlin; Pan Yuepeng; Su Minmin; Goulding Keith;

  • 作者单位

    Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China|China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;

    China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;

    Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China;

    Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China;

    Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China;

    China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;

    Rothamsted Res, Sustainable Soil & Grassland Syst Dept, Harpenden AL5 2JQ, Herts, England;

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  • 正文语种 eng
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  • 关键词

    Air pollution; Wet deposition; Dry deposition; Nitrogen; Agricultural activities;

    机译：空气污染;湿沉降;干沉降;氮;农业活动;

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