青藏高原农田生态系统碳平衡
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* 国家重点基础研究发展规划项目(G1998040800);中国科学院青藏高原研究项目(KZ951A1204、KZ95T06)资助


CARBON BALANCE IN AGRO-ECOSYSTEM IN QINGHAI-TIBET PLATEAU
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    摘要:

    为探讨青藏高原农田生态系统碳平衡规律及其影响因子,并揭示其对全球含碳温室气体源、汇变化的贡献与响应,1998~1999连续2年在拉萨农业生态站农田用静态箱法和生物量取样法开展土壤—植被界面CO2吸收与排放的试验研究。农作物生长季,以冬小麦为例,生长前期(从播种到拔节)土壤碳排放量高于植被碳固定,生长后期(灌浆到成熟)则是植被碳固定高于土壤碳排放量,从全年来看,土壤碳排放量略高于植被碳固定。

    Abstract:

    During the period from 1998 to 1999,absorption and emission of CO2 in soil and vegetation system were studied by the static box method used in fields and biomass sampling,in the Lhasa Agro-ecology Station.This experiment was designed to explore carbon balance in the field ecosystem on the Qinghai-Tibet Plateau and its affecting factors,and disclose its contribution and response to the switch between pool and source of carbonaceous gas in the atmosphere.The CO2 emissions in soil was more than the CO2 assimilation of vegetation in the early wheat growing period(from sowing to jointing),while in the late period (from milking to maturity) the assimilation exceeded the emissions.The annual CO2 emissions in soil were a little more than the annual assimilation of vegetation.

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刘允芬,欧阳华,张宪洲,钟华平,罗天祥.青藏高原农田生态系统碳平衡[J].土壤学报,2002,39(5):636-642. DOI:10.11766/trxb200011280504 Liu Yun-fen, Ouyang Hua, Zhang Xian-zhou, Zhong Hua-ping, Luo Tian-xiang. CARBON BALANCE IN AGRO-ECOSYSTEM IN QINGHAI-TIBET PLATEAU[J]. Acta Pedologica Sinica,2002,39(5):636-642.

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  • 收稿日期:2000-11-28
  • 最后修改日期:2001-04-18
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  • 在线发布日期: 2013-02-25
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