文章摘要
靳姗姗.黄土丘陵枣林非生育期土壤水分 损失及其剖面气态水分析[J].水土保持学报,2016,(3):
黄土丘陵枣林非生育期土壤水分 损失及其剖面气态水分析
Mechanism of soil water loss in non-growth period of jujube plantation in the loess hilly region
投稿时间:2016-02-29  修订日期:2016-03-28
DOI:
中文关键词: 土壤干化  非生育期 土壤水分损失  土壤气态水
英文关键词: soil  desiccation, non-growth  period, soil  water loss, soil  water vapor
基金项目:*林业公益性行业科研专项资助项目(20140470)、“十二五”国家科技支撑计划资助项目(2011BAD29B04、2013BAD20B03)和陕西省科技统筹创新工程计划资助项目(2013KTZB02-03-02)第一作者靳姗姗(1990-),硕士生,主要从事林地耗水研究,E-mail:554556909@qq.com 黄土丘陵枣林非生育期土壤水分
作者单位邮编
靳姗姗 中国科学院教育部水土保持与生态环境研究中心 712100
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中文摘要:
      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:非生育期是枣林地土壤水分损失的十分严重的阶段,0-200cm土层土壤水分损失量可达到85.64-92.34mm,大约是同期降雨量的2倍。蒸发是非生育期土壤水分损失的主体。在垂直剖面上,非生育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。
英文摘要:
      SBased on the soil desiccation and water shortageSproblems inSthe semi-arid Loess Plateau in China, the soil water and temperature ofS0-1000Scm soil layers in a dense jujube plantation was measured duringS2012 to 2015 in order to investigate the mechanism of soil water loss in jujube plantations in the region.SThe results of our analysis showed thatSevaporation is the main reason of the soil water loss in non-growth period: the soil water moved toward the upper soil layer and eventually converted to water vapor when near the soil surface, then diffused into the atmosphere. The soil water loss in the non-growth period is serious: the amount of soil water loss in 0-200 cm soil layerSwasSup to 85.64-92.34 mm, which is about twice as much as contemporaneous rainfall. BothSthe water loss amount and the net flux of soil water vapordecreased with the increase of soil depths in the 0-540 cm soil profile. The most active layer of soil water loss is 0-11 cm.
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