田-沟-塘系统底质磷素赋存特征与释放风险

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关键词：磷；赋存形态；解吸；农田；沟渠；水塘；面源污染；释放风险

中图分类号：X52；X71 文献标识码：A

文章编号：0439-8114（2025）07-0061-07

DOI：10.14088/j.cnki.issn0439-8114.2025.07.011 开放科学（资源服务）标识码（OSID）：口

Occurrence characteristics and release risks of phosphorus in sediment of field-ditch-pond system

XIABi-qing1，²，LI Si-si1²，ZHUANG Yan-hua1，²，LIU Hong-bin³，ZHANG Liang1，2

（1.InovationcadeyforPrecsionMeasurementScieneandTecoloHubeiProvincialEngineingResearchCenterofonointSouce PolutionContro/HubeiKeyLaboratoryforEnviroentandisasterMonitoingandEvaluationJianghaPlainHonguLakeStationforWetland Ecosystemsechitds;3InstuteofAalesosdegioal，sadflualiecKyaboatooftou Control，MinistryofAgriculture andRural Affairs，Beijing1Ooo81，China）

Abstract：Thephosporusadsorptioncharacteristicsofsedimentsindiferentunitsofthefield-ditch-pondsystemandtheinfluence of phosphorusoccurrenceformsonadsorptioncharacteristicsweresystematicallanalyzedthrough phosphorusadsorptiontest.Theresults showedthat theLangmuirisothermmodelaccuratelydescrbedphosporusadsorption.Fieldsoilsexhibitedstablephosphorusadsorption，whilepondandditchsedimentsshowedconsiderablevariability，withsomepondsitespresentingahighriskofphosphorus release.Phosphorusoccurrncefomsanalysisrevealedthat higherorganicphosporuscontentcorrelatedwithloweradsorptioncpacity.Significantchangesinphosphorusadsorptioncapacitywereobservedbeforeandafterriceplanting，withditchsedimentdsoption notablyincreasingduringthericegrowingperiodandfieldsoiladsorptionfurtherenhancingaftericeharvestRationalmanagementof fields，ditches and ponds could mitigate phosphorus release and help reduce agricultural non-point source polution.

Key words： phosphorus；ocurrence forms；desorption; field;ditch；pond; non-point source pollution;release risk

农业面源污染通过农田地表径流、排水和渗漏等途径扩散进入环境，对水体、土壤等生态系统造成污染，已成为中国农村生态环境恶化的重要原因[1，2]。（剩余9914字）