自然资源学报 ›› 2010, Vol. 25 ›› Issue (10): 1709-1717.doi: 10.11849/zrzyxb.2010.10.009

• 资源生态 • 上一篇    下一篇

锡林河流域典型草原碳素生物小循环研究

耿元波1, 罗光强1,2, 李明峰1   

  1. 1. 中国科学院 地理科学与资源研究所, 北京 100101;
    2. 中国科学院 研究生院, 北京 100049
  • 收稿日期:2009-07-30 修回日期:2010-06-28 出版日期:2010-10-20 发布日期:2010-10-20
  • 作者简介:耿元波(1969- ),男,新疆人,副研究员,博士,中国自然资源学会会员(S300000921M),主要研究方向为草地生态系统碳循环。E-mail:gyb0741@sina.com
  • 基金资助:

    科技部"十一五"支撑计划(2006BAJ10B04);科技部973项目(2002CB412503);中国科学院地理科学与资源研究所自主部署创新项目(200905009)

A Study on Carbon Biogeochemical Cycles in Inner Mongolia Steppe, China

GENG Yuan-bo1, LUO Guang-qiang1,2, LI Ming-feng1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-07-30 Revised:2010-06-28 Online:2010-10-20 Published:2010-10-20

摘要: 应用生物地球化学分室方法研究了内蒙古锡林河流域2个典型草原群落——羊草草原和大针茅草原的碳素生物小循环,研究表明:①生长季禁牧的羊草草原植物分室碳素净固定量为165.50 gC·m-2,土壤分室碳素净排放量为174.36 gC·m-2,系统碳素净固定量为-8.86 gC·m-2,基本处于平衡状态,植物分室的碳输入和碳输出也近于平衡状态;②生长季禁牧的大针茅草原植物分室碳素固定量为130.04 gC·m-2,土壤分室碳素净排放量为128.28 gC·m-2,系统碳素净固定量为1.76 gC·m-2,基本处于平衡状态,植物分室的碳输入和碳输出在降水量大的年份以输入为主,在降水量小的年份近于平衡状态;③水热等生境条件较适宜的羊草草原碳素周转量比大针茅草原要大得多,水分是典型草原碳素循环量的主要影响因素。

关键词: 环境科学, 碳循环, 生物地球化学, 典型草原

Abstract: Carbon cycles of two steppes in Xilin River Basin were studied using biogeochemical cycle compartment theory. The major results include: 1) For the soil-palnt-atmosphere system of fenced Leymus chinensis steppe, the net carbon fixed by the plant compartment was 165.50 gC·m-2 during the growing season, the net emission from soil compartment was 174.36 gC·m-2,so the net carbon fixed by the system was -8.86 gC·m-2. In general, the input and output of carbon were nearly equivalent. The plant compartment was approximately balanced, too. 2) For the soil-plant-atmosphere system of fenced Stipa grandis steppe, the plant compartment fixed 130.04 gC·m-2 during the growing season, the net carbon emission from soil compartment was 128.28 gC·m-2, therefore the net carbon fixed by the system was 1.76 gC·m-2. The carbon input into plant compartment far exceeded the carbon output in wet year and it would become balanced in drought year. 3) The turnover of carbon element in Leymus chinensis steppe is larger than Stipa grandis steppe, which is caused by the more suitable geographical conditions. Water content is the main affecting factor of carbon cycles in Inner Mongolia steppe.

Key words: environmental science, carbon cycle, biogeochemistry, steppe

中图分类号: 

  • S812