施硫对水稻镉吸收及其逆境生理指标的影响

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中图分类号：S143 文献标识码：A 文章编号：1006-060X（2025）11-0031-06

Abstract：Toevaluate theapplication efect of precise sulfurapplication technology inallviatingcadmum（Cd）polutionstres in rice，a pot experiment wasconducted to simulate single Cd stress in soil （by applying cadmiumsulfate at1.46，4.38，and 7.30mg/kg 1 UsingYuzhenxiang'asthetestricevarietyteefectsofsulfurfertilizeraplicationates（potassimsulfateappdat01.32， 62.64，93.96，125.28，and 156.6g/pot） on Cd accumulation in the aboveground parts of rice，soil Cd content， and stress physiological indicatorsofriceplantsundervaryingdegresofCdpolutionwereinvestigated.Theresultsshowed thatthe treatmentwith62.64 g/potof potassumsulfateahievedtheoptimalreductioninCdcontentinicegainsadstraw.Specifcalludermildandoderate Cd pollution conditions， the Cd content in rice grains decreased by 22% and 32% ，respectively，compared to thecontrol.Under moderate and severe Cd pollution conditions，the Cd content in rice straw decreased by 23% and 41% ，respectively， compared to the control.Cdstresshadaminorimpactonthesolublesugarcontentinicegrains，butsignifcantlyafectedthecontentsofsoluble proteinandL-proline.BothexcessveandinsuffcientaplicationofsulfurfertilizerinterferedwiththeregulationofCduptakein rice， and influenced its stress physiological response. In conclusion， the application of 62.64g/pot of potassium sulfate is a potential fertilizationstrategytateectivelyeduces Cduptakeinicewilemaintaiinggrainutritionalqualityprovidingaefereneforth safe utilization of mildly to moderately Cd-contaminated farmland.

Key words：cadmiumpolution; potexperiment;fertilization techniques; physiological respose;sulfur fertilizerregulation

镉（Cd）是一种毒性较强的重金属元素，易被动植物吸收富集，已被世界卫生组织列为一级致癌物质[1-3]。（剩余8731字）