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太湖典型菜地土壤氮磷向水体径流输出与生态草带拦截控制 被引量:50

Soil nitrogen and phosphorus losses with surface runoff from typical vegetable field of Taihu Lake region and their control with grass buffer strip
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摘要 农业面源氮磷输出是导致太湖流域地表水富营养化主要原因之一,查明该地区农田土壤地表径流氮磷向水体迁移形态与通量,并实施径流控制,对水体富营养化治理具有重要现实意义。蔬菜地是太湖流域重要的农业种植方式。通过设置野外径流小区,观测了春夏季蔬菜地土壤氮磷径流输出,并探讨了生态拦截草带对径流中不同形态氮磷拦截效果。结果表明,2004年10月25日至2005年8月17日,菜地土壤氮磷径流输出总量分别为3 010.9和695.0 g.hm-2;其中颗粒态为主,分别占64%和75%。可溶态氮中,NH4+-N为主,占50%,可溶态磷中H2PO4-为主,占87%。生态拦截草带对径流氮和磷拦截效率分别为42%~91%,30%~92%。生态草带对颗粒态氮磷拦截效率大于可溶态。拦截草带可有效地控制蔬菜地土壤氮、磷通过径流向水体迁移。 Agricultural non-point source nitrogen(N) and phosphorus(P) losses are one of the major factors resulting in surface waters eutrophication,while understanding the fluxes and chemical forms of N and P in runoff is critical to control the eutrophication of water bodies.Vegetable field is a main land use pattern in Taihu Lake region,but its N and P losses haven't been reported.In this paper,a field monitoring study of N and P losses with surface runoff was conducted,and the effects of grass buffer strip on red...
出处 《生态学杂志》 CAS CSCD 北大核心 2006年第8期905-910,共6页 Chinese Journal of Ecology
基金 国家"863"计划资助项目(2002AA601012)。
关键词 蔬菜地 地表径流 生态拦截带 vegetable field nitrogen phosphorus runoff buffer strip.
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