| 温度和湿度对高寒湿地土壤碳矿化和氮矿化的影响 |
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| 作者姓名： | GAO Jun-Qin OUYANG Hu XU Xing-Liang ZHOU Cai-Ping ZHANG Feng |
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| 作者单位： | GAO Jun-Qin(Beijing Forestry University, Beijing 100083 China;Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 China;Graduate University of the Chinese Academy of Sciences, Beijing 100049 China);OUYANG Hun,XU Xing-Liang,ZHOU Cai-Ping(Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 China);ZHANG Feng(Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 China;Graduate University of the Chinese Academy of Sciences, Beijing 100049 China)
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金，the Forestry Commonweal Program of China |
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| 摘 要： | 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.
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| 关 键 词： | CO2产量 氮矿化 温度 水饱和度 湿地 |
| 收稿时间： | 23 January 2008 |
Effects of temperature and water saturation on CO2 production and nitrogen mineralization in alpine wetland soils |
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| GAO Jun-Qin,OUYANG Hu,XU Xing-Liang,ZHOU Cai-Ping,ZHANG Feng.Effects of temperature and water saturation on CO2 production and nitrogen mineralization in alpine wetland soils[J].Pedosphere,2009,19(1):71-77. |
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| Authors: | GAO Jun-Qin OUYANG Hu XU Xing-Liang ZHOU Cai-Ping and ZHANG Feng |
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| Institution: | Beijing Forestry University, Beijing 100083 (China);Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China);Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China);Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China);Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China);Graduate School of the Chinese Academy of Sciences, Beijing 100049 (China) |
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| 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 oC) and water saturation (noninundation and inundation). A significant positive relationship were found between CO2 production and N mineralization under increasing temperatures from 5 to 35 oC with the same water saturation condition in the marsh soils(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 oC, in the marsh soil (r2 > 0.70, P < 0.009) and (r2 > 0.61, P < 0.013) in the peat soil. 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. |
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| Keywords: | CO2 production N mineralization temperature water saturation wetland |
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