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作 者 ：段华平,卞新民,谢小立,王凯荣

期 刊 ：生态学报 2004年 24卷 3期 页码：457~463

关键词：红壤坡地；季节性干旱；地表/大气界面；水分传输；

Keywords:red soil slopes, seasonal drought, land-atmosphere interface, water transport,

摘 要 ：以红壤坡地茶园为研究对象 ,用波纹比——能量平衡法研究了红壤坡地干旱季节地表 -大气界面水热传输特性 ,结果表明 :在茶园稳定生态系统中 ,气象因素和表层土壤含水量是影响地表 -大气界面水热传输的重要因素。特别是在受旱条件下 ,土壤水分对地表 -大气界面水热传输起决定作用 ,土壤水分越小 ,潜热通量越小 ,显热通量越大 ,反之亦然。观测期间 ,棵间蒸发量占总蒸散量的 3 2 % ,因此通过减少田间土壤水分蒸发来提高农田水分利用效率大有可为。

Abstract:Water resource is very rich in red soil regions of China. But the dramatic changes and spatial unbalances of rainfall in these regions is unfavorable for the agricultural sustainable development of this region. Based on Taoyuan Agro-ecological Experimental Station, Chinese Academy of Sciences, water transport processes through soil-atmosphere and leaf- atmosphere interface and their relationships with the environmental conditions were studied on red soil slopes tea plant. The aim of this study was to invest...

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