Contribution of Atmospheric Nitrogen Compounds to N Deposition in a Broadleaf Forest of Southern China  

作　　者：HU Zheng-Yi XU Cheng-Kai ZHOU Li-Na SUN Ben-Hua HE Yuan-Qiu ZHOU Jing CAO Zhi-Hong 

机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008 （China） [2]College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210007 （China） [3]College of Resources and Environment, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100（China）

出　　处：《Pedosphere》2007年第3期360-365,共6页土壤圈（英文版）

基　　金：Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (No. ISSASIP0205);the National Key Basic Research Support Foundation of China (No. 1999011805);the State Key Laboratory of Soil and Sustainable Agriculture, China;the Scientific Research Foundation for Returned Overseas Chinese Scholars;the State Education Ministry of China;and the National Natural Science foundation of China (No. 40305019)

摘　　要：A one-year study in a typical red soil region of southern China was conducted to determine atmospheric nitrogen (N) fluxes of typical N compounds (NH3, NH4-N, NO3-N, and NO2) and contribution of three sources (gas, rainwater, and particles) to N deposition. From July 2003 to June 2004, the total atmospheric N deposition was 70.7 kg N ha-1, with dry deposition accounting for 75% of the total deposition. Dry NH3 deposition accounted for 73% of the dry deposition and 55% of the total deposition. Moreover, NO2 contributed 11% of the dry deposition and 8% of the total deposition. Reduced N compounds (NH4+ and NH3) were the predominate contributors, accounting for 66% of the total deposition. Therefore, atmospheric N deposition should be considered when soil acidification and critical loads of atmospheric deposition on soils are estimated.A one-year study in a typical red soil region of southern China was conducted to determine atmospheric nitrogen （N） fluxes of typical N compounds （NH3, NH4-N, NO3-N, and NO2） and contribution of three sources （gas, rainwater, and particles） to N deposition. From July 2003 to June 2004, the total atmospheric N deposition was 70.7 kg N ha^-1, with dry deposition accounting for 75% of the total deposition. Dry NH3 deposition accounted for 73% of the dry deposition and 55% of the total deposition. Moreover, NO2 contributed 11% of the dry deposition and 8% of the total deposition. Reduced N compounds （NH4^＋ and NH3） were the predominate contributors, accounting for 66% of the total deposition. Therefore, atmospheric N deposition should be considered when soil acidification and critical loads of atmospheric deposition on soils are estimated.

关 键 词：atmospheric deposition broadleaf forest NITROGEN red soil soil acidification 

分 类 号：S718.554.2[农业科学—林学]