人工模拟降雨条件下紫色土坡地生物可利用磷的输出.pdfVIP

中国环境科学2008，28(6)：542—547 ChinaEnvironmentalScience 人工模拟降雨条件下紫色土坡地生物可利用磷的输出 高 扬L2，朱 波卜，汪 涛1，缪驰远3，唐家良1，周培2(1冲国科学院成都山地灾害与环境保护研究所，四 100875) 摘要：采用人工模拟降雨研究了不同坡度和降雨强度条件下紫色土坡地的磷素迁移方式和规律．结果表明，降雨强度和坡度越大．颗粒 方式迁移．壤中流的少量泥沙是壤中流BPP迁移的主要途径：BAP输出浓度和径流量的关系显著相关．暴雨易引起BAP和泥沙的大量 迁移。表明强度大的降雨可能给水体环境带来更大的压力． 关键词：地表径流：壤中流：生物可利用磷 中图分类号：X144 文献标识码：A 文章编号：1000-6923(2008)06-0542-06 soil landbio-available outundertheconditionofartificialsimulatedrainfall． Purplesloping phosphorll$transported ofMountainHazardsand GAO Bo卜，WANGTa01，MIAO Pei2(1．Institute Yang比，ZHU Chi．yuan3，TANGJia-lian91，ZHOU Environment Chinese of ofEnvironmentalScience Protection。the AcademySciences，Chengdu610041，China：2．Department and of Normal 200240，China：3．School Engineering，ShanghaiJiaotongUniversity,Shanghai Geography，BeijingUniversity， Environmental 100875，China)．ChinaScience，2008，28(6)：542-547 Beijing artificialsimulated theconditionofdifferent andrainfall the Abstract：Through rainfall，under slopingdegree intensity soil land element andlawwerestudied．Variablefieldartificialrainfall purpleslopingphosphOIllStransportedtype intensity simulationswele on5．0m wide×0．5m andoverlandnmoffandsubsurfaceflowWele performedlong×1．0m highploL collected．Bio-available withincrescentrainfall and andthesediment gradienL phosphoras(BAP)exportchanged intensity extractablebio-available outconcentrationsubsurfaceflowwasabout30％--45％ofthat