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太湖流域稻田湿地对低污染水中氮磷的净化效果

薛利红 杨林章

薛利红, 杨林章. 太湖流域稻田湿地对低污染水中氮磷的净化效果[J]. 环境科学研究, 2015, 28(1): 117-124.
引用本文: 薛利红, 杨林章. 太湖流域稻田湿地对低污染水中氮磷的净化效果[J]. 环境科学研究, 2015, 28(1): 117-124.
XUE Lihong, YANG Linzhang. Purification of Water with Low Concentrations of N and P in Paddy Wetlands in Taihu Lake Region[J]. Research of Environmental Sciences, 2015, 28(1): 117-124.
Citation: XUE Lihong, YANG Linzhang. Purification of Water with Low Concentrations of N and P in Paddy Wetlands in Taihu Lake Region[J]. Research of Environmental Sciences, 2015, 28(1): 117-124.

太湖流域稻田湿地对低污染水中氮磷的净化效果

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07101-004);太湖水污染治理专项资金(第七期)技术示范类科研课题招标项目(20130209);江苏省农业科技自主创新项目(CX(14)2050)

Purification of Water with Low Concentrations of N and P in Paddy Wetlands in Taihu Lake Region

  • 摘要: 对太湖流域稻田湿地设置3种布水设计——地表漫流式、串形沟灌渗滤式和弓形沟灌渗滤式, 研究连续进水方式下3种布水设计的稻田湿地对低污染水中氮、磷的净化效果及其产量效应. 结果表明:①在水稻拔节期和灌浆期,稻田湿地对低污染水中TN和TP的去除率分别可达77%~93%和87%~96%,稻田排水中ρ(TN)均在2 mg/L以下. ②3种布水设计对TN的去除率表现为漫流式>弓形沟灌渗滤式>串形沟灌渗滤式;对TP的去除率则以弓形沟灌渗滤式最高,串形沟灌渗滤式最差,但二者间差异不显著. ③弓形沟灌渗滤处理由于沟渠占田面积比例相对比较适宜,水稻籽粒产量最高(8 520 kg/hm2),比传统的漫流型稻田湿地增产5.2%;而串形沟灌渗滤处理因其沟渠占田面积比例(约14%)较大,水稻籽粒产量最低. 研究结果证实,利用太湖流域广泛存在的稻田湿地来净化周围的低污染水方法可行且效果较好.

     

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  • 收稿日期:  2014-02-07
  • 修回日期:  2014-08-21
  • 刊出日期:  2015-01-25

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