控制排水条件下排水沟中氮磷流失规律的实验研究
首发时间:2010-03-18
摘要:近年来,由农业所造成的面源污染已不容忽视,其主要污染物是氮、磷营养元素。稻田排水是氮磷损失的主要途径。本文通过水稻一次排水实验,分析了在控制排水条件下排水沟中氮磷浓度随时间变化的衰减规律。实验结果表明:在控制排水条件下稻田排水中氮、磷的衰减规律很相似。在排水沟中蓄滞3-5天,对氮的去除率可达到75.9-82.47%,对磷的去除率可达到65.5-79.6%。通过延长排水在排水沟中的滞留时间,可以大大减少排水中氮磷流失,该实验结果对由稻田排水产生的水环境污染具有很好的指导意义。
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The attenuation law of nitrogen and phosphorus in controlled drainage ditch
Abstract:In recent years, the non-point source pollution caused by agricultural has not be ignored, where the main pollutants are nitrogen and phosphorus nutrients. Rice field drainage is the main way of nitrogen and phosphorus losses. The attenuation law of nitrogen and phosphorus with time-varying are analyzed under the conditions of the controlled drainage ditch. The results show that: The attenuation law of nitrogen is very similar to phosphorus Under the conditions of the controlled drainage ditch. Stagnating drainage in the drains ditch for 3-5 days, the rate of removal of the nitrogen could reach 75.9% -82.47%, and the rate of removal of the phosphorus could reach 65.5-79.6%. The drainage ditch by extending the stagnation time can greatly reduce the losses of nitrogen and phosphorus. The experimental results produced by the rice field drainage have a good guide in water pollution.
Keywords: Controlled drainage drain ditch the losses of nitrogen and phosphorus
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No.4083551319112688****
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