| 表面活性剂影响下的紫色土氮素垂向迁移风险 |
| 摘要点击 1218 全文点击 907 投稿时间：2009-08-27 修订日期：2010-01-08 |
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| 中文关键词 表面活性剂 铵态氮 硝态氮 紫色土 迁移 |
| 英文关键词 surfactant ammonium nitrogen nitrate nitrogen purple soil transport |
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| 中文摘要 |
| 采用模拟淋溶试验，研究了表面活性剂十二烷基苯磺酸钠（SDBS）对紫色土氮素的垂向迁移的影响.SDBS减少紫色土铵态氮的淋溶损失，且SDBS浓度越高，铵态氮损失越少.SDBS促进紫色土硝态氮的淋失，累积淋失量依次为SDBS100>SDBS40>SDBS0>SDBS5.低浓度SDBS抑制紫色土总凯氏氮（TKN）损失，但高浓度SDBS则显示促进作用，SDBS40、SDBS100的TKN累积淋失量分别较SDBS0增加了16.8%、 22.36%.SDBS淋溶影响紫色土氮素的垂向分布，紫色土氮素有明显向下迁移的趋势，且SDBS浓度越高，迁移性越强. |
| 英文摘要 |
| The simulated leaching experiment was conducted to determine the effects of surfactant of sodium dodecyl benzene sulphonate (SDBS) on vertical transporting of nitrogen in purple soil. SDBS could reduce NH+4-N loss from soil, and the higher concentration of SDBS, the less loss. SDBS could increase NO-3-N loss from soil, and the order of accumulation loss is SDBS100>SDBS40>SDBS0>SDBS5. Lower concentration SDBS decrease TKN loss, but higher concentration SDBS had a reverse effect, and compared with SDBS0, the accumulation loss TKN of SDBS40, SDBS100 increased by 16.8%, 22.36%, respectively. SDBS could affect vertical transporting of nitrogen in purple soil, that is, the significant down-transporting of nitrogen was observed after leaching with SDBS, and the higher concentration of SDBS, the more obviously transporting trend. |
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