蓄水条件下盐碱土中盐分空间变化特征
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陕西省重点科技创新团队计划项目(2016KCF23)。


Spatial variation characteristics of salt in saline and alkaline field under impounding condition
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    摘要:

    根据陕西卤泊滩地区盐碱地整治工程,修建模拟装置,通过测定土体中盐分含量的空间变化,研究蓄水条件下土壤盐分的运移特征,为当地盐碱地治理提供理论支撑。结果表明,盐碱土土体一侧蓄水后,土体中的盐分顺着盐分梯度向水体中弥散,水体中的含盐量变化呈现由低到高的趋势,最终与土体间达到动态平衡;在土体垂直方向上,0~60 cm土体盐分减少,盐分含量主要集中在距地表100 cm左右处;在水平方向上,水体对于土体的作用范围为9 m,除此以外土体盐分含量变化不大。说明在试验该模型下,蓄水条件对距其一定范围内的盐碱土体具有改善效果。

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    According to the Lubotan salineHYPERLINK"../../../wozai/AppData/Local/Yodao/DeskDict/frame/20160203161226/javascript:void(0);" and alkaline fieldHYPERLINK"../../../wozai/AppData/Local/Yodao/DeskDict/frame/20160203161226/javascript:void(0);" consolidation project,the simulating device was built to study the distribution of salt under impounding by detecting salt content,which might provide theoretical support for local salinealkali land management.The results showed that after impounding in the side of salinealkali soil,the salt in soil layer dispersed to the water with the salt gradient,changes of water salt showed a trend from low to high,eventually the salt reached the dynamic balance between water and soil.In the vertical direction of soil profile,soil salt in 0~60 cm was reduced.Salt content of soil was concentrated in 100 cm below the surface.In the horizontal direction,water influential distance was 9 m,and soil salt which was more than 9 m away from the water was little changed.Therefore,saline and alkaline field could be improved under impounding condition in a certain range.

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董起广,张扬,高红贝.蓄水条件下盐碱土中盐分空间变化特征[J].中国土壤与肥料,2017,(6):82-87.

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  • 收稿日期:2017-01-13
  • 最后修改日期:2017-03-14
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  • 在线发布日期: 2017-12-22
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