| 微咸水灌溉对斥水土壤水盐运移的影响 |
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| 引用本文： | 刘春成,李 毅,郭丽俊,关冰艺,廖轶群,王 娟.微咸水灌溉对斥水土壤水盐运移的影响[J].农业工程学报,2011,27(8):39-45. |
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| 作者姓名： | 刘春成 李 毅 郭丽俊 关冰艺 廖轶群 王 娟 |
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| 作者单位： | 西北农林科技大学水利与建筑工程学院旱区农业水土工程教育部重点实验室,杨凌,712100 |
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| 基金项目： | 国家自然科学基金（50709028）；西北农林科技大学基本科研业务费专项资金（QN2009087） |
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| 摘 要： | 土壤斥水性影响着作物的产量，为了研究微咸水灌溉对斥水土壤水盐运移的影响，进行了室内土柱微咸水入渗试验。对比了不同矿化度和斥水程度对两种土质水盐运移的影响，探讨了微咸水入渗后土壤斥水性的变化特征。结果表明，不斥水土壤的入渗能力随矿化度的增加而增加。亲水和斥水土壤的入渗率均可采用Kostiakov公式简单模拟。斥水土壤入渗能力在矿化度为1?g/L时达到最大，超过1?g/L后则随矿化度的增大而减小。微咸水入渗的累积入渗量与湿润锋推进距离呈良好的线性关系，斥水性土壤中的相同剖面水盐的含量比不斥水的减小。微咸水入渗后土壤产生了一定的斥水性。该研究表明微咸水灌溉对盐渍化土壤的水盐分布和斥水性均有一定程度的影响。
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| 关 键 词： | 水，盐，入渗量，斥水性，微咸水，矿化度 |
| 收稿时间： | 2010/12/30 0:00:00 |
| 修稿时间： | 2011/6/30 0:00:00 |
Effect of brackish water irrigation on water and salt movement in repellent soils |
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| Liu Chuncheng,Li Yi,Guo Lijun,Guan Bingyi,Liao Yiqun and Wang Juan.Effect of brackish water irrigation on water and salt movement in repellent soils[J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(8):39-45. |
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| Authors: | Liu Chuncheng Li Yi Guo Lijun Guan Bingyi Liao Yiqun and Wang Juan |
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| Institution: | Liu Chuncheng,Li Yi,Guo Lijun,Guan Bingyi,Liao Yiqun,Wang Juan (Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,College of Water Resources and Architecture Engineering,Northwest Agriculture and Forestry University,Yangling 71200,China) |
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| Abstract: | The existence of soil water-repellency had impacts on crop yields. In order to study soil water and salt movements of water-repellent soils irrigated by brackish water, laboratory soil column infiltration experiments were conducted. Impacts of different mineralization degrees and different water-repellency degrees on the movements of soil water and soil salt were compared for two soil textures. The variations of soil water-repellency during infiltration were also discussed. The results showed that infiltration ability of non-water-repellent soils increased with the increase of mineralization degrees. Both the infiltration rates of wettable and repellent soils could be simply fitted by Kostiakov equation. For the water repellent soils, the infiltration ability was largest at mineral degree of 1g/L, but decreased with the increase of mineralization degree when mineralization degree were larger than 1g/L. There was good linear relationship between cumulative infiltration and the wetting front distance when irrigated by brackish water. Soil water content and soil salt content at the same depth of the water repellent soil profiles were smaller than those of the wettable soil profiles. To some extent, soil water repellency was caused after irrigated by brackish water. This work indicated that brackish water irrigation had some impacts on distributions of soil water and soil salt as well as water-repellency of salinized soil. |
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| Keywords: | water salts infiltration water repellency brackish water mineralization degree |
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