农业环境科学学报Issue(12)：2389-2394,6.DOI:10.11654/jaes.2014.12.016
陕西关中地区大气氮湿沉降通量的动态变化
Dynamics of Atmospheric Nitrogen Wet Deposition Fluxes in Guanzhong Area, Shaanxi
摘要
Abstract
Atmospheric nitrogen(N)deposition has long term impacts on the terrestrial and water ecosystems. In order to estimate the atmo-spheric N deposition fluxes in Guanzhong Area of Shaanxi Province, we monitored N wet deposition in Xi′an and Yangling from November 2009 to Octomber 2010. During the monitoring period, the annual rainfall of Xi′an and Yangling was 620.5 and 532.3 mm, respectively. The mean values ofρ(NH+4-N)andρ(NO-3-N)were respectively 3.058 and 2.356 mg·L-1 in Xi′an, and 3.990 and 2.709 mg·L-1 in Yangling. Theρ(NH+4-N)andρ(NO-3-N)in Xi′an andρ(NH+4-N)in Yangling were higher in spring and winter than in summer and autumn, whereasρ(NO-3-N)in Yangling in autumn and winter was slightly higher than that in spring and summer. The fluxes of total inorganic nitrogen (TIN)deposition in Xi′an and Yangling were up to 24.791 and 28.894 kg·hm-2·a-1, mainly in form of NH+4-N that accounted for 67.3%and 56.3%of the TIN in two sites. The amount of nitrogen wet deposition was positively correlated with rainfall. The present results indicate that wet N deposition contributes to the field inorganic N inputs, which should be taken into consideration when applying fertilizers.关键词
大气氮沉降/湿沉降/关中地区Key words
atmospheric nitrogen deposition/wet deposition/Guanzhong area分类
资源环境引用本文复制引用
梁婷,同延安,刘学军,乔丽..陕西关中地区大气氮湿沉降通量的动态变化[J].农业环境科学学报,2014,(12):2389-2394,6.基金项目
国家自然科学基金资助项目 （）
