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黄土丘陵枣林休眠期土壤水分损失及其剖面气态水分析
Authors
佘 檀
汪 星
+3 more
汪有科
王 智
靳姗姗
Publication date
1 January 2016
Publisher
Abstract
针对黄土丘陵半干旱区枣林地土壤干化缺水严重的现象,利用 2012 — 2015 年土壤水分、温度等实测 数据,分析枣林土壤水分损失的运动规律及其机理。结果表明:休眠期是枣林地土壤水分损失十分严重的 阶段, 0 — 200cm 土层土壤水分损失量达到 85.64~92.34mm ,大约是同期降雨量的 2 倍。蒸发是休眠期 土壤水分损失的主体。在垂直剖面上,休眠期土壤水分损失自上而下呈现减少趋势,土壤水分由地下向上 运移,最终在近地表以气态水形式散失到大气。土壤气态水运动的活跃层在 0 — 11cm 土层间,最大深度 为 540cm 。受温度、相对湿度等因素的影响,土壤气态水通量随土壤深度增加而减少。</p
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 12/06/2019