陕西关中地区大气氮湿沉降特征分析  

Characteristics Analysis on the Atomospheric Nitrogen Wet Deposition in Guanzhong Region of Shaanxi

作　　者：梁婷 陈炜 张彦军[1] 刘学军[2] LIANG Ting;CHEN Wei;ZHANG Yanjun;LIU Xuejun(Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi China;China Agricultural University,Beijing 100094,China)

机构地区：[1]陕西省灾害监测与机理模拟重点实验室/宝鸡文理学院地理与环境学院,陕西宝鸡721013 [2]中国农业大学,北京100094

出　　处：《河南科学》2023年第3期408-413,共6页Henan Science

基　　金：陕西省教育厅专项科研计划项目(18JK0047);宝鸡文理学院科研项目(ZK2017043);陕西省科技厅自然科学计划项目(2022JM-126)。

摘　　要：为了进一步了解陕西关中地区大气氮沉降的变化特征,采用降水采集法对宝鸡2018年大气氮湿沉降进行了观测,并对雨水中可溶性无机氮浓度及沉降通量的动态变化进行了分析.结果表明:①雨水中NH_(4)^(+)-N和NO_(3)^(-)-N月平均质量浓度为1.581 mg/L和1.369 mg/L,且降水量少的月份雨水中氮素浓度较高;②NH_(4)^(+)-N和NO_(3)^(-)-N在雨水中的季浓度均呈现冬季高、夏季低的趋势;③大气氮湿沉降通量为9.728 kg/(hm^(2)·a),其中NH_(4)^(+)-N和NO_(3)^(-)-N分别占53.6%和46.4%,且降水量多的季节氮沉降通量也相应较高;④大气氮总沉降通量达23.713 kg/(hm^(2)·a),约占当地农田氮肥施入的10%.In order to further understand the variation characteristics of atmospheric nitrogen deposition in Guanzhong area of Shaanxi Province,the precipitation collection method was used to observe the atmospheric nitrogen wet deposition in Baoji in 2018,and the dynamic changes of soluble inorganic nitrogen concentration and deposition flux in rainwater were analyzed.The results showed that:①The monthly average concentrations of NH_(4)^(+)-N and NO_(3)^(-)-N in rainwater were 1.581 mg/L and 1.369 mg/L respectively,and the nitrogen concentration in rainwater was higher in the months with low rainfall.②The seasonal concentrations of NH_(4)^(+)-N and NO_(3)^(-)-N in rainwater were higher in winter and lower in summer.③The total amount of atmospheric nitrogen wet deposition was 9.728 kg/(hm^(2)·a),of which NH_(4)^(+)-N and NO_(3)^(-)-N accounted for 53.6%and 46.4%,respectively.The amount of atmospheric nitrogen wet deposition was correspondingly higher in seasons with high rainfall.④The total atmospheric nitrogen deposition flux reached 23.713 kg/(hm^(2)·a),which accounted for about 10%of the nitrogen fertilizer application in local farmland.

关 键 词：大气氮沉降 湿沉降 无机氮 降雨量 

分 类 号：X142[环境科学与工程—环境科学]