利用大型蒸渗仪模拟土壤2植物2大气连续体水分蒸散应用生态学报.PDFVIP

应 用 生 态 学 报 　1999 年 2 月 　第 10 卷 　第 1 期 　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 CHIN ESE J OU RNAL OF A PPL IED ECOL O GY ,Feb . 1999 ,10 ( 1) ∶45～48 利用大型蒸渗仪模拟土壤植物大气连续体水分蒸散 ( 中国科学院地理研究所 , 北京 100 10 1) 陈建耀 　刘昌明　吴 　凯 　 【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 Evapotranspiration of soilplantatmospheric continuum - a simulation study with lysimeter. Chen J ianyao , Liu Changming and Wu Kai ( I ns tit ute of Geog rap hy , A cadem ia S inica , B eij ing 100 10 1) . Chin . J . A pp l . Ecol . , 1999 , ( ) 10 1 :45～48. Evapotranspiration ( ET) and evaporation from ground water surface ( Eg) are t he two factors most difficult to deter mine in all component s of field water balance . In regions wit h shallow ground water , t he ground water plays an obvi ous role on supplying t he soil water in unsaturated zone by capillary rise , which is of significant importance to t he crop growt h . The exp erimental data of water balance component s and relevant p arameters of soilplantat mosp heric contin uum model were obtained by lysimeter , Bowen ratio meter , hydraulic evapotranspirometer , etc . Based on t he data measured by lysimeter , t he simulation value of soilplantat mosp heric continuum model was verified . The observed da ta of ET and Eg were comp aratively analyzed wit h t heir simulation data , and t he causes of