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应用生态学报 ›› 1999, Vol. 10 ›› Issue (1): 45-48.

• 研究论文 • 上一篇    下一篇

利用大型蒸渗仪模拟土壤-植物-大气连续体水分蒸散

陈建耀, 刘昌明, 吴凯   

  1. 中国科学院地理研究所, 北京 100101
  • 收稿日期:1998-02-23 修回日期:1998-06-29 出版日期:1999-01-25 发布日期:1999-01-25
  • 通讯作者: 陈建耀,男,33岁,副研究员,在职博士生.现主要从事农田水分实验与SPAC系统、地理信息系统在水文、水资源中的应用等研究工作,发表论文20余篇.E-mail:chenjy@dls.iog.ac.cn E-mail:chenjy@dls.iog.ac.cn
  • 基金资助:

    国家自然科学基金重大资助项目(49391602).

Evapotranspiration of soil-plant-atmospheric continuum - a simulation study with lysimeter

Chen Jianyao, Liu Changming, Wu Kai   

  1. Institute of Geography, Academia Sinica, Beijing 100101
  • Received:1998-02-23 Revised:1998-06-29 Online:1999-01-25 Published:1999-01-25

摘要: 在农田水量转化各分量中,蒸散与潜水蒸发是最难测定的。在地下水浅埋地区,地下水通过毛管上升而补给包气带土壤水的作用十分明显,对作物生长意义重大。利用大型蒸渗仪、波文比、水力蒸发器等仪器,获得了大量水平衡因子的试验数据和土壤植物大气连续体(SPAC)模型中的有关参数。以大型蒸渗仪实测值为基准,验证了农田土壤植物大气连续体模型的模拟值,并主要就蒸散和潜水蒸发量,对实测与模拟值作了比较分析,探讨了导致两者差异的原因。

关键词: 土壤-植物-大气连续体, 蒸散, 大型蒸渗仪, 试验, 模拟

Abstract: Evapotranspiration (ET) and evaporation from ground water surface (Eg) are the two factors most difficult to determine in all components of field water balance. In regions with shallow ground water, the ground water plays an obvious role on supplying the soil water in unsaturated zone by capillary rise, which is of significant importance to the crop growth. The experimental data of water balance components and relevant parameters of soil-plant-atmospheric continuum model were obtained by lysimeter, Bowen ratio meter, hydraulic evapotranspirometer, etc. Based on the data measured by lysimeter, the simulation value of soil-plant-atmospheric continuum model was verified. The observed data of ET and Eg were comparatively analyzed with their simulation data, and the causes of difference between them were discussed.

Key words: Soil-plant-atmospheric continuum, Evapotranspiration, Lysimeter, Experiment, Simulation