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草业学报 ›› 2011, Vol. 20 ›› Issue (6): 287-292.

• 研究简报 • 上一篇    下一篇

贝加尔针茅草原生态系统生长季碳通量及其影响因素分析

徐丽君1,唐华俊1,杨桂霞1,王旭1,王波2,辛晓平1*   

  1. 1.农业部资源遥感与数字农业重点开放实验室 呼伦贝尔国家野外站 中国农业科学院农业资源与农业区划研究所,北京100081;
    2.中国工程院咨询服务中心,北京 100088
  • 收稿日期:2010-08-26 出版日期:2011-06-25 发布日期:2011-12-20
  • 通讯作者: E-mail:xinxp@sina.com
  • 作者简介:徐丽君(1978-),女,蒙古族,内蒙古通辽人,博士。E-mail:xulijun_nmg@163.com
  • 基金资助:
    草畜业数字化管理与优化决策技术研究(2007AA10Z230)和现代农业产业技术体系建设专项资金资助。

Variation of net ecosystem carbon flux and its impact factors on Stipa baicalensis steppe in the growing season

XU Li-jun1, TANG Hua-jun1, YANG Gui-xia1, WANG Xu1, WANG Bo2, XIN Xiao-ping1   

  1. 1.Key Lab of Resources Remote Sensing and Digital Agriculture/Hulunber Grassland Ecosystem Observation and Research Station/Institute of Agricultural Resources and Regional Planning of Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2.Consultany Programme Centre of Chinese Academy of Engineering, Beijing 100088,China
  • Received:2010-08-26 Online:2011-06-25 Published:2011-12-20

摘要: 以贝加尔针茅草原为研究对象,利用涡度相关通量测量系统,测定CO2通量及其影响因子。结果表明,贝加尔针茅草原CO2通量存在明显的日、季变化,不同生育阶段CO2通量日、季变化呈“U”型,其中以7月最为明显,CO2通量固碳、释放碳最大值均出现在7月,分别为-0.56和0.83 mg/(m2·s)。潜热通量、显热通量、有效光合辐射与CO2通量显著相关,与土壤温度、土壤含水量相关不显著。

Abstract: CO2 flux and its impact factors were measured by an eddy correction system in Stipa grassland. There were distinct diurnal and seasonal variations with an inverted U-shape diurnal change in CO2 flux. There was obvious change in July, and the maximum uptake and emission were -0.56 and 0.83 mg/(m2·s), respectively. Latent heat flux, sensible heat flux, net radiation flux and photosynthetic active radiation were related to CO2 flux. There was no obvious correlation between soil temperature and soil water content with CO2 flux.

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