地球科学进展 ›› 1995, Vol. 10 ›› Issue (3): 283 -288. doi: 10.11867/j.issn.1001-8166.1995.03.0283

干旱气候变化与可持续发展 上一篇    下一篇

全球冻融地区土壤是重要的N 20释放源的综合分析
朴河春,刘广深,洪业汤   
  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
  • 收稿日期:1994-06-06 修回日期:1995-01-03 出版日期:1995-06-01
  • 通讯作者: 朴河春
  • 基金资助:

    国家自然科学基金项目“石灰岩地区土—水系统中微生物脱氮化作用与健康关系”(编号:49273188)资助.

SOILS IN GLOBAL FREEZING-THAWING AREAS AS THE MAJOR N 2O-RELEASING SOURCE

Piao Hechun, Liu Guangshen,Hong Yetang   

  1. Institute of Geochemistry,Chinese Academy of Sciences,Guiyang   550002
  • Received:1994-06-06 Revised:1995-01-03 Online:1995-06-01 Published:1995-06-01

N2O是重要的温室气体之一,它是微生物硝化作用和脱氮化作用过程的产物。有多种释放源,其中土壤圈是重要的释放源之一。在影响N2O释放通量的诸多因素中温度是关键因素之一。本文根据土壤冻融加强有机质矿化作用,以及对微生物群体产生非生物应力的性质,结合冻融地区土壤和冻土带湿地所具有的特征,进行综合分析,论述冻融地区土壤是重要的N2O释放源。

    N2O is one of the important greenhouse gases, and is an intermediate product of nitrification and denitrification. There are a variety of N2O-releasing sources, of which the pedosphere is one of the important N2O-releasing sources. Temperature is one of key factors affecting N2O-releasing flux.
    On the basis of enhancing mineralization of organic matter, and inducing non-biological stress on microorganic population as a result of soil freezing-thawing, it is summarized that global freezing-thawing soils are the important N2O-releasing sources in consideration of the characteristics of freezing-thawing soils and wetland in tundra.

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