用双涌源能量守恒模型计算浑善达克沙地羊草群落蒸腾量的研究The Calculation of Transpiration of the Community of the Leymus Chinensis in Otingdag Sandy Area by Energy Conservation Mode
朝伦巴根,王志强,刘小燕
摘要(Abstract)：
文章利用浑善达克沙地南沙梁试验站两年的羊草群落气孔导度及相关的环境因子观测数据,用多元逐步回归法建立了羊草群落单一牧草与环境因子间响应关系模型,并用此模型计算出单一牧草的冠层导度。羊草群落冠层的导度用叶宽、株高加权单一牧草气孔导度获得。利用羊草群落冠层阻力及其他阻力按S-W能量守恒模型计算了两个不同水文年的羊草群落蒸腾量。2004年是丰水年(生育期雨量R=274.6mm;P=5%),计算的羊草群落的蒸腾量为430.1mm,实测土壤蒸发169.0mm;2005年(生育期雨量R=178.8mm;P=50%)计算的羊草群落的蒸腾量为378.4mm,实测土壤蒸发124.2mm。
关键词(KeyWords)： 羊草群落;气孔导度;能量守恒模型;蒸腾量
基金项目(Foundation): 国家自然科学基金重点项目(50139040)资助
作者(Author): 朝伦巴根,王志强,刘小燕
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