中国生态农业学报2018，Vol.26Issue(2)：190-194,5.DOI:10.13930/j.cnki.cjea.171061
土壤亚硝酸气体(HONO)排放过程及其驱动机制
The mechanisms of HONO emissions from soil: A review
摘要
Abstract
Nitrous acid (HONO) significantly contributes to atmospheric hydroxyl radical (OH·) and also influences atmos-pheric oxidation capacity and air quality. Comparison of HONO concentrations measured in a field campaign and by modeling showed a large unknown HONO source during daytime. Studies have shown that the unknown HONO source can be attributed to soil emissions, a major source of atmospheric HONO. The mechanisms may be taking the form of chemical equilibrium between soil nitrite and H+, reactive uptake and displacement by soil, emissions by ammonia-oxidizing bacteria (AOB) and other micro-organisms, or surface reaction between hydroxylamine and H2O. Therefore, HONO flux from soils is controlled by soil nitrite concentration, pH, AOB abundance, soil minerals, soil moisture and C/N ratio. The mechanism of HONO emissions from soil has remained a point of hot discussion and few results have been reported from China. Here, we introduced the background of HONO emissions from soil, reviewed studies on the mechanisms of HONO emissions from soil and the related driving factors. This review was a relevant support for research on reducing nitrogen loss, enhancing nitrogen use efficiency,and evaluating the effects of nitrogen fertilization on environmental and urban air quality.关键词
氮循环/气态亚硝酸/土壤/pH/硝化/氨氧化细菌/二氧化氮Key words
Nitrogen cycle/HONO/Soil/pH/Nitrification/Ammonia-oxidizing bacteria (AOB)/Nitrogen dioxide分类
资源环境引用本文复制引用
吴电明,夏玉玲,侯立军,刘敏..土壤亚硝酸气体(HONO)排放过程及其驱动机制[J].中国生态农业学报,2018,26(2):190-194,5.基金项目
中央高校基本科研业务费专项资金、国家自然科学基金重点项目(41730646)和面上项目(41371451)资助This study was supported by the Fundamental Research Funds for the Central Universities of China and the National Natural Science Foun-dation of China(41730646,41371451). （41730646）
