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生态学杂志 ›› 2010, Vol. 29 ›› Issue (04): 717-723.

• 研究报告 • 上一篇    下一篇

喀斯特地区土壤剖面CO2、CH4和N2O浓度的相关关系

刘芳1,2,刘丛强1,王仕禄1,朱正杰3   

  1. 1中国科学院地球化学研究所环境地球化学国家重点实验室|贵阳 550002;2百色学院化学与生命科学系|广西百色 533000; 3重庆地质矿产研究院| 重庆 400042
  • 出版日期:2010-04-09 发布日期:2010-04-09

Correlations among CO2, CH4, and N2O concentrations in soil profiles in central Guizhou Karst area.

LIU Fang1,2, LIU Cong-qiang1, WANG Shi-lu1, ZHU Zheng-jie3   

  1. 1State Key Laboratory of the Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China|2Department of Chemistry and Life Science, Baise University, Baise 533000, Guangxi, China|3 Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China
  • Online:2010-04-09 Published:2010-04-09

摘要: 2006年6月—2007年5月对喀斯特地区土壤剖面中CO2、CH4和N2O进行采样测定,分析了三者间时空分布的相关关系。结果表明,土壤剖面中CO2和N2O含量分别为0.35~35.3 ml·L-1和0.31~5.31 μl·L-1,夏秋季节高于冬春季节;CH4浓度为0.1~4.7 μl·L-1,季节差异不大。随着土壤深度的增加,CO2和N2O的浓度先增加而后明显减小或趋于稳定,CH4浓度则与CO2和N2O相反。相关分析表明,土壤剖面CO2与N2O浓度的时空分布呈显著正相关,与CH4则呈显著负相关。N2O和CH4的时空变化规律为互逆关系,但只在花溪荒草地、清镇阔叶林以及森林公园的马尾松林和阔叶林观测点达到显著水平。

关键词: 森林群落, 次生演替, 种间协变

Abstract: From June 2006 to May 2007, the monthly CO2, CH4, and N2O concentrations in soil profiles in central Guizhou Karst area were measured, with their spatiotemporal correlations analyzed. The CO2 and N2O concentrations in the soil profiles were 0.35-35.3 ml·L-1 and 0.31-5.31 μl·L-1, respectively, being higher in summer and autumn than in winter and spring, and the CH4 concentration was 0.1-4.7 μl·L-1, with no significant difference among seasons. With the increase of soil depth, the CO2 and N2O concentrations increased first and then decreased or tended to be stable, while CH4 had an inverse trend unlike CO2 and N2O. The spatiotemporal distribution of CO2 in the soil profiles was significantly positively correlated with that of N2O, but negatively correlated with that of CH4; while the spatiotemporal variations of CH4 and N2O were negatively correlated, being significant in Huaxi grassland, Qingzhen hardwood forest, and forest park Pinus massoniana forest and hardwood forest.

Key words: Forest communities, Secondary succession, Interspecies covariation