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生态学杂志 ›› 2004, Vol. ›› Issue (5): 42-45.

• 研究报告 • 上一篇    下一篇

长白山四种林分土壤CO2释放通量的研究

林丽莎1,2, 韩士杰1, 王跃思3, 谷志静1   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
    2. 中国科学院研究生院, 北京, 100039;
    3. 中国科学院大气物理研究所, 北京, 100029
  • 收稿日期:2003-11-26 修回日期:2004-02-23 出版日期:2004-10-10
  • 通讯作者: 韩士杰
  • 基金资助:
    中国科学院知识创新工程重大项目(KZCX1-SW-01);国家重点基础研究发展规划资助项目(2002CB412502)

Soil CO2 flux in several typical forests of Mt.Changbai

LIN Lisha1,2, HAN Shijie1, WANG Yuesi3, GU Zhijing1   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China;
    3. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • Received:2003-11-26 Revised:2004-02-23 Online:2004-10-10

摘要: 对长白山地区4种典型林分下土壤释放CO2通量的研究表明,在较短的时间尺度上,4种林型在CO2释放通量上有显著的差别,各林型CO2通量的释放表现出明显的空间异质性,其释放顺序为:山杨白桦混交林>原始阔叶红松林>白桦林>山杨林,其中山杨白桦混交林对CO2释放的贡献最大,而山杨林最小。4种林分土壤CO2通量的全日变化过程并不一致,除山杨白桦混交林和气温有较一致性的规律,呈较明显的单峰型外,其余并无明显的变化规律。凋落物对林地CO2释放通量的变化有显著的影响,有凋落物覆盖的林地土壤CO2释放量明显大于无凋落物覆盖的林地,其平均通量为262.86~556.55mgC·m-2·h-1,而无凋落物覆盖林地土壤CO2的平均通量为20585~39569mg·m-2·h-1。凋落物排放CO2量占林地总排放量的14%~30%,并且改变了林地CO2释放通量大小的排序。

关键词: 缺苞箭竹, 土壤养分库, 速效养分动态, 密度

Abstract: The soil CO2 flux of four temperate forest types was studied in Mt.Changbai. The soil CO2 flux in the four typical forests was significantly different at short time scale. The released CO2 flux of the four typical forest indicated obvious spatial heterogeneity. The rate of released CO2 flux was the highest in Populus-Betula mixed forest and the lowest in populus forest. The sequence was: Populus-Betula mixed forest > broad leaved-Korean pine forest > Betula forest > Populus forest. Daily course of soil CO2 flux was very different in the four forest types. Except for Populus-Betula mixed forest, in which the changes of CO2 flux exhibited a single peak and showed relative consistency with changes of temperature, there were no regular changes of CO2 flux in other forest types. The litter influenced the CO2 flux significantly in each forest type. The CO2 flux in the forest where soil was covered with litter was higher than that with out litter. The average value was 262.86~556.55 mgC·m-2·h-1 in the forests with the litter and 205.85~395.69 mg·m-2·h-1 in the forests without litter. The contribution of litter to total soil CO2 flux was 14 %to 30%.

Key words: Fargesiadenudata, Soil nutrient pool, Available nutrient dynamics, Density

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