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生态学杂志 ›› 2004, Vol. ›› Issue (5): 24-29.

• 研究报告 • 上一篇    下一篇

影响阔叶红松林土壤CO2排放的主要因素

王淼1, 韩士杰1, 王跃思2   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
    2. 中国科学院大气物理研究所, 北京, 100029
  • 收稿日期:2003-12-24 修回日期:2004-03-29 出版日期:2004-10-10
  • 通讯作者: 王淼,男,1964年生,副研究员.主要从事树木生理生态学研究,发表论文40余篇.
  • 基金资助:
    国家重点基础研究发展规划项目(G1999043407);中国科学院知识创新工程项目(KZ-CX-SW-01-01B-10);国家自然科学基金资助项目(30271068)

Important factors controlling CO2 emission rates from forest soil

WANG Miao1, HAN Shijie1, WANG Yuesi2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • Received:2003-12-24 Revised:2004-03-29 Online:2004-10-10

摘要: 采用静态封闭箱式技术对长白山阔叶红松林土壤CO2的排放通量进行1年的观测,并通过多元回归分析了土壤CO2排放速率与5个环境因子间的关系。结果表明,阔叶红松林土壤CO2排放与表层无凋落物的土壤CO2排放速率在测定年度内具有相同的季节变化趋势。在不同的月份中,以7月份最高,2月份最低;在夏季18:00为土壤日CO2排放的最高峰;土壤CO2排放速率与5个环境因子进行多元回归的结果显示:林地土壤CO2排放速率与地表温度和地下20cm土壤湿度呈显著正相关。根据气象资料推算,阔叶红松林的年凋落物和土壤CO2排放通量分别为2804gCO2·m-2·a-1和3911gCO2·m-2·a-1。阔叶红松林凋落物排放CO2年通量占土壤林地CO2排放总量的28%。

关键词: 生态系统, 通量, 微气象学方法, 箱式法

Abstract: The soil CO2 emission fluxes in two treatments in the broad-leaved & Korean pine (Pinus koreansis) forest of Changbai Mountain were evaluated with closed static chamber technique. The results showed that there were similarly seasonal variation trends for soil CO2 emission rates in soil and litter-free soil. The maximum soil CO2 emission was in July and the minimum was in February. In summer the peak for diurnal CO2 emission occurred at 14:00~18:00 p.m. Effects of 11 environmental factors on soil CO2 emission fluxes were examined by multivariate analysis of variance. Results showed that soil CO2 emission rate was positively correlated to the temperature at 0 cm depth and soil moisture at 20 cm depth in the broad-leaved & Korean pine forest. The annual soil respiration amount was estimated as 3911 g CO2· m-2·ya-1 for soil with litters and 2804 g CO2·m-2·yr-1 for litter-free soil respectively. CO2 emission amounting from the litters accounted for 28% of total soil CO2 emission.

Key words: Ecosystem, Flux, Micrometeorological method, Chamber method

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