| 地下水埋深对土壤溶质（Br－）运移的影响 |
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| 引用本文： | 曹红霞,康绍忠,时学双.地下水埋深对土壤溶质（Br－）运移的影响[J].西北农林科技大学学报(社会科学版),2007,35(12):99-102. |
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| 作者姓名： | 曹红霞 康绍忠 时学双 |
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| 作者单位： | 1. 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100
2. 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100;中国农业大学,中国农业水问题研究中心,北京,100083 |
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| 基金项目： | 国家自然科学基金;西北农林科技大学校科研和教改项目 |
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| 摘 要： | 为了阐明地下水埋深对土壤溶质运移的影响,通过室内均质土柱试验,以Br-为示踪剂,对90 mm和45 mm两种次灌水量下,1.7,1.2和0.8 m地下水埋深土壤中表施溶质Br-的运移规律进行了研究。结果表明,土表Br-聚集趋势均随地下水埋深增大而增强;随灌水次数增加,土表Br-向下淋移趋势随水位加深而减缓;较浅的地下水埋深有利于土壤溶质(Br-)向下运移;随次灌水量的增加,土表溶质聚集减弱,土壤溶质向下迁移加快。即较浅的地下水埋深和较大的次灌水量能促进土壤溶质向下迁移,减弱其在土表的聚集。
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| 关 键 词： | 地下水埋深 次灌水量 溶质运移 Br- |
| 文章编号： | 1671-9387(2007)12-0099-04 |
| 收稿时间： | 2006/12/14 0:00:00 |
| 修稿时间： | 2006年12月14 |
Effects of groundwater table on soil solute (Br-) transport |
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| CAO Hong-xia,KANG Shao-zhong,SHI xue-shuang.Effects of groundwater table on soil solute (Br-) transport[J].Journal of Northwest Sci-Tech Univ of Agr and,2007,35(12):99-102. |
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| Authors: | CAO Hong-xia KANG Shao-zhong SHI xue-shuang |
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| Institution: | 1 (1 Key Lab of Arid Agricultural Soil and Water Engineering of the Ministry of Education,Northwest A & B University,Yangling,Shaanxi 712100,China;2 Center of Agricultural Water Research in China,China Agricultural University,Beijing 100083,China) |
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| Abstract: | In order to clarify the effect of groundwater table depth on soil solute transport,solute(Br-) transport in soils with 1.7,1.2 and 0.8 m groundwater table(GWT) under 90 mm and 45 mm irrigation amount per time was investigated through disturbed soil columns by using tracer Br-in lab.Results show the tendency of accumulation for Br-at soil surface strengthens as GWT deepens.The trend of transport downward for soil solute(Br-) at soil surface is abated with bigger GWT as irrigation times increase.The shallower GWT favors the downward movement of soil solute(Br-).The congregation of soil solute at soil surface is abated and transport downward is quickened as irrigation amount per time is augmented.Namely,the shallower GWT and more irrigation amount per time promote downward transport of soil solute,and weaken aggregation of soil solute at soil surface. |
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| Keywords: | Br- |
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