LI Zhaoyang,ZHANG Qiangwei,WANG Xingpeng.Effect of Different Buried Depth on Soil Water and Salt Movement During Moistube-irrigation[J].Northern Horticulture,2018,42(14):118-123.[doi:10.11937/bfyy.20174064]
埋设深度对微润灌土壤水盐运移的影响
- Title:
- Effect of Different Buried Depth on Soil Water and Salt Movement During Moistube-irrigation
- 文献标志码:
- A
- 摘要:
- 以南疆盐碱土为试材，采用微润灌室内模拟试验的方法，研究了微润带不同埋深（5、10、15、20 cm）对土壤水盐运移的影响。结果表明：灌水初期，累计入渗量随着埋设深度逐渐降低，灌水后期，埋深较浅的微润带的出流量减少，累计入渗量下降；不同埋深均表现为灌水初期平均入渗率高于后期；水平方向上，不同埋深条件下湿润体均以微润带埋设位置为中心，左右呈对称关系，垂直方向上湿润体均处于微润带埋设位置以下；湿润体内土壤最大含水率随着埋深的增加逐渐降低，表层土壤湿润区范围及土壤含水率与微润带埋深呈反比关系；微润带埋设深度对水平方向上土壤盐分影响较小，垂直方向上，土壤脱盐区及积盐区位置随着埋设深度的增加逐渐下移；随着微润带埋设深度的增加，脱盐区内的土壤平均含盐量逐渐升高，脱盐率逐渐下降。
- Abstract:
- Taking the salinized soil in south of Xinjiang as an example,a laboratory simulation test was carried out to investigate the effects of different buried depths (5,10,15,20 cm) on the soil water and salt distribution characteristics.The results showed that,in the early stage of irrigation，the cumulative infiltration reduced gradually with the buried depths．In the later stage of irrigation，the flow of miostube-belt which relatively shallow buried depths was reduced;the average infiltration rate in the early stage of irrigation was higher than the later.In the horizontal direction,each horizontal distribution of moisture area under different buried depths was symmetric about the center of buried moistube.Symmetric about the center of buried moistube.Each vertical distribution of moisture area under different buried depths was under the buried depths.The maximum soil moisture content was reduced gradually with the increasing of buried depths.the moisture area of shallow soil and soil moisture content assumed inverse ratio connection with the increasing of buried depths.The influence of buried depths on the soil salt in horizontal distribution were small,the location of soil desalination area and salt accumulation area decreased with the increased of buried depth.The average of soil salt content was increased gradually and the desalting rate decreased gradually with the increased of buried depth.
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备注/Memo
第一作者简介：李朝阳（1986-），男，硕士，讲师，现主要从事干旱区节水灌溉理论与技术等研究工作。E-mail：lizhaoyang2i1@163.com.责任作者：王兴鹏（1978-），男，硕士，副教授，现主要从事极端干旱荒漠区农业水土环境等研究工作。E-mail：13999068354@163.com.基金项目：国家自然科学基金资助项目（51469029）；塔里木大学现代农业工程重点实验室开放课题资助项目（TDNG20160601）；塔里木大学校长基金资助项目（TDZKQN201512）；塔里木大学大学生创新训练计划资助项目（201610757064）。收稿日期：2018-03-14