| 摘要: |
| 以溴离子（Br-)为示踪剂，对不同次灌水量（30，60，90 mm）下均质扰动土柱中污染运移规律进行了研究，结果表明，每30 mm的有效灌水量使Br-浓度峰下移约10 cm，即污染物浓度峰的运移深度与有效灌水量成倍比关系，且可用简化的溶质运移模型估算，污染物再分布主要取决于灌水量，蒸发量，排水量三者之间的关系。因此，为了减少土壤中某些污染物（如NO3-）的淋移，应尽可能适时，适量进行灌溉。 |
| 关键词: 灌水量 水污染预测 Br-浓度峰 溶质运移 |
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| 基金项目:国家杰出青年基金资助项目(49725102)；西北农林科技大学青年教师基金资助项目 |
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| Effect of different irrigation quantity on bromide transport in soil |
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| Abstract: |
| Studies of pollutant transport in disturbed columns were conducted under different irrigation treatments with bromide tracer.The results showed that the transport depth of bromide concentration peak has proportional relation with effective irrigation quantity,and can be estimated with simplified model of solute transport.Solute redistribution depends on the relationship between irrigation,evaporation and drainage amount.In order to reduce leaching of some pollutant (such as NO3-) in soil,irrigation water should be applied with proper water amount at right time. |
| Key words: irrigation quantity water pollution forecast Br-concentration peak solute transport |
