Pedosphere 19(1): 71--77, 2009
ISSN 1002-0160/CN 32-1315/P
©2009 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of temperature and water saturation on CO2 production and nitrogen mineralization in alpine wetland soils |
GAO Jun-Qin1,2,3 , OUYANG Hua2, XU Xing-Liang2, ZHOU Cai-Ping2 and ZHANG Feng2,3 |
1 Beijing Forestry University, Beijing 100083 E-mail: wg638@163.com;
2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);
3 Graduate University of the Chinese Academy of Sciences, Beijing 100049 (China) |
| ABSTRACT |
| Relationships between carbon (C) production and nitrogen (N) mineralization were investigated in two alpine wetland soils of the Tibetan Plateau using laboratory incubation under different temperatures (5, 15, 25, and 35℃) and water saturation (noninundation and inundation). A significant positive relationship was found between CO2 production and N mineralization under increasing temperatures from 5 to 35 ℃ with the same water saturation condition in the marsh soil (r2 > 0.49, P < 0.0001) and the peat soil (r2 > 0.38, P < 0.002), and a negative relationship with water saturation increasing at the same temperature, especially 25 and 35 ℃, in the marsh soil (r2 > 0.70, P < 0.009) and the peat soil (r2 > 0.61, P < 0.013). In conclusion, temperatures and water saturation could regulate the relationship between CO2 production and net N mineralization in the Tibetan alpine marsh and peat soils. |
| Key Words: CO2 production, N mineralization, temperature, water saturation, wetland |
| Citation: Gao, J. Q., Ouyang, H., Xu, X. L., Zhou, C. P. and Zhang, F. 2009. Effects of temperature and water saturation on CO2 production and nitrogen mineralization in alpine wetland soils. Pedosphere. 19(1): 71-77. |
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