| 亚热带稻区大气NO2、HNO3及硝态氮污染特征及干湿沉降 |
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| 引用本文： | 欧阳秀琴,王波,沈健林,朱潇,王杰飞,李勇,吴金水.亚热带稻区大气NO2、HNO3及硝态氮污染特征及干湿沉降[J].环境科学,2019,40(6):2607-2614. |
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| 作者姓名： | 欧阳秀琴 王波 沈健林 朱潇 王杰飞 李勇 吴金水 |
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| 作者单位： | 苏州大学金螳螂建筑学院,苏州 215123;中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙41012;中国科学院长沙农业环境观测研究站,长沙410125;苏州大学金螳螂建筑学院,苏州,215123;中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙41012;中国科学院长沙农业环境观测研究站,长沙410125 |
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| 基金项目： | 国家重点研发计划项目（2017YFD0800104）；国家自然科学基金项目（41771336） |
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| 摘 要： | 二氧化氮(NO_2)和硝酸(HNO_3)是大气中的酸性含氮污染气体,是形成气溶胶和雨水硝态氮的重要前体物质,在高强度的大气氮氧化物排放下,我国亚热带稻区农业生态系统大气NO_2、HNO_3气体及气溶胶、雨水硝态氮污染特征及其干湿沉降量尚不清楚.本研究选取我国亚热带丘陵区一个典型双季稻区,对大气中NO_2-N、HNO_3-N、气溶胶和雨水硝态氮浓度及相关气象因子进行了同步监测,旨在明确大气NO_2-N、HNO_3-N及气溶胶、雨水硝态氮浓度特征及其影响因素,并定量其干湿沉降量.结果表明,大气中NO_2-N、HNO_3-N、大气颗粒物PM_(10)中NO_3~--N_p、雨水中NO_3~--N_r年均浓度分别为4.2μg·m~(-3)、0.7μg·m~(-3)、4.0μg·m~(-3)和1.0 mg·L~(-1),年氮沉降量分别为1.5、3.2、2.3和6.1 kg·hm~(-2).NO_2-N浓度与气温呈负相关;HNO_3-N浓度与风速呈负相关;NO_3~--N_p浓度与气温呈负相关,与NO_2-N浓度呈正相关,与HNO_3-N浓度未显著相关,表明NO_2-N浓度在本研究区域是形成NO_3~--N_p污染的重要限制因子;NO_3~--N_r浓度与降雨量呈负相关,与HNO_3-N浓度和NO_3~--N_p浓度呈正相关.本研究区域大气中NO_2-N、HNO_3-N、NO_3~--N_p及雨水NO_3~--N_r年总干湿沉降量为13.0 kg·hm~(-2),是稻田重要的氮素来源,对稻田及周边生态系统的影响不容忽视.
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| 关 键 词： | 二氧化氮 硝酸 气溶胶 雨水 硝态氮 干湿沉降 稻田 |
| 收稿时间： | 2018/10/30 0:00:00 |
| 修稿时间： | 2018/12/30 0:00:00 |
Atmospheric Nitrogen Dioxide, Nitric Acid, Nitrate Nitrogen Concentrations, and Wet and Dry Deposition Rates in a Double Rice Region in Subtropical China |
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| OUYANG Xiu-qin,WANG Bo,SHEN Jian-lin,ZHU Xiao,WANG Jie-fei,LI Yong and WU Jin-shui.Atmospheric Nitrogen Dioxide, Nitric Acid, Nitrate Nitrogen Concentrations, and Wet and Dry Deposition Rates in a Double Rice Region in Subtropical China[J].Chinese Journal of Environmental Science,2019,40(6):2607-2614. |
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| Authors: | OUYANG Xiu-qin WANG Bo SHEN Jian-lin ZHU Xiao WANG Jie-fei LI Yong and WU Jin-shui |
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| Institution: | Gold Mantis School of Architecture, Soochow University, Suzhou 215123, China;Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Gold Mantis School of Architecture, Soochow University, Suzhou 215123, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China and Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China |
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| Abstract: | |
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| Keywords: | nitrogen dioxide nitric acid aerosol rainwater nitrate nitrogen wet and dry deposition paddy field |
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