Pedosphere 17(3): 360--365, 2007
ISSN 1002-0160/CN 32-1315/P
©2007 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Contribution of atmospheric nitrogen compounds to N deposition in a broadleaf forest of southern China |
HU Zheng-Yi1 , XU Cheng-Kai1, ZHOU Li-Na1,2, SUN Ben-Hua1,3, HE Yuan-Qiu1, ZHOU Jing1 and CAO Zhi-Hong1 |
1 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: zhyhu@issas.ac.cn
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) |
| ABSTRACT |
| 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. |
| Key Words: atmospheric deposition, broadleaf forest, nitrogen, red soil, soil acidification |
| Citation: Hu, Z. Y., Xu, C. K., Zhou, L. N., Sun, B. H., He, Y. Q., Zhou, J. and Cao, Z. H. 2007. Contribution of atmospheric nitrogen compounds to N deposition in a broadleaf forest of southern China. Pedosphere. 17(3): 360-365. |
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