不同退水条件下典型圩区稻田-沟-塘系统氮磷浓度时空变化特征

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中图分类号X171文献标识码A

文章编号 0517-6611（2025）18-0063-08

doi：10.3969/j.issn.0517-6611.2025.18.015

SpatialandTemporal Variation CharacteristicsofNitrogenandPhosphorusConcentrationsinthePaddyField-Ditch-PondSystem ofPolderAreasUnderDifferentDrainageConditions

QIN Xian-yan，ZHENGTao（Geological SurveyotAnhui Province（Anhui InstituteofGeologicalSciences），Hetei，Anhui 2301） AbstractThespatialandtemporalvationsofnrogenandposporusconcentratiosintheaddfeld-dic-ondssteiinatypcal polderareaofteChaouLkeBasinereaalyzedusingfied-pointmonitoringResultsindicatedthatthetotalnitrogen（T）andaonm nitrogen （ NH4+ -N）concentrationsatninesampling points inthepaddyfielddrainageexhibitedsignificantspatialandtemporal heterogeneity during bothinlldgatiodageeventsHowevertoncentratiosaachsaplingntgenrallreasdasthooth periodprogrsedTeoncentrationinhowstreamtertarydichassigcantlyfluenedbyatofepadfielddragi highlysigniftositieoelatiosedetntoUnderotaaeodios，tratonateofospt tionwaslessdistnc.Insofpospousompositioarticulateposhos（P）wasthomnantforoftotalpospus（T）uder rainfall drainage，accounting for 69.28% to 85.43% ，whereasunder irigation drainage，the proportion of PP in TP was relatively lower （ 50.05% ）.Ditchesatallevels withinthepolderarea demonstratedacertaincapacitytoretainTNandTP，withahigherretentioneiciency observedforTsefindinssuggesthateditcondstemspondeddierentlttrogenandposphousinpadfelddaigeunderrainfall and irrigation drainage conditions.

Keywordsddeld-dicodtefallaggatiodage;rgenndosporusoctratiosSpatialdt ral variation characteristics；Chaohu lake basin

圩田也称圩、皖或圩皖，一般是闭合的，通过节制闸或抽排水站进行圩内圩外水量交换，在抵御洪水中发挥了重要作用[1]。（剩余14664字）