农业面源污染分布及其生态风险

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关键词：农业面源污染；氮磷流失；稻麦轮作；生态风险；污染特征 中图分类号：X52 文献标识码：A 文章编号：1008-9500（2025）11-0165-03 DOI： 10.3969/j.issn.1008-9500.2025.11.051

Distribution and Ecological Risks of Agricultural Non-Point Source Pollution

CHENGCheng'，WEIJianjian’，ZHAOPeng²，TU Yizhou¹，CAOShihai 2 （20 （1. Jiangsu Environmental Engineering Technology Co.，Ltd.; 2.School of Environmental Engineering，Nanjing Institute of Technology，Nanjing21oooo，China）

Abstract： Currently，agricultural non-point source polution has becomea key limiting factor for the continuous improvementof waterqualityinChina’sriverbasins.Jiangsuprovinceisatypical intensiveagriculturalregion，the nonpointsource pollutioncausedby nitrogenand phosphorus loss in farmlandisparticularly prominent，posing aserious threat to keywaters suchas theTaihuLakeand HongzeLake.Thecharacteristicsof non-pointsourcepolutioninfarmlandunder rice-wheatrotation and vegetable planting mode are evaluated using theintensive agriculturalarea in Suzhou citymarket asthe researchobject.Theresultsshowthatthenitrogen lossintensityishigher intherice-wheat rotationarea，and the riskof phosphoruslossisprominentinthevegetableplantingarea，andthedifferenceinfertilizationmanagementisthekey factorinthe spatial diferentiationofpollutionload.Some areas have become keycontrol zones due to highfertilizerinput. Ecologicalriskanalysissows taturentlyrogenndpospoussiosfromfamandoseautroationtattothe regional waterenvironment.Itisuggestedtosystematically promotetecontrolofagculturalnon-poitsouepolltionfromthe aspectsofprecisionfertilzation，ildingologicalintercptionsstems，oingontrol，adimproingmoitoingtoks， order to promote the coordinated development of agricultural production and water environment protection.

Keywords： agricultural non-point sourcepollution; nitrogen and phosphorus los; rice-wheat rotation; ecological risk; pollution characteristics

随着我国水污染治理重点从点源向面源转变，农业面源污染已成为制约流域水质持续改善的瓶颈。（剩余3310字）