微塑料对萝卜种子萌发和幼苗生长的影响

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中图分类号：S631.1 文献标志码：A 文章编号：1673-2871（2025）11-186-07

Abstract：To investigate thepotential hazardsofpolyethylene（PE）microplasticsonvegetables，theefectsof polyethylenemicroplasticswithdifferent particlesizes（ 0.013mm powderand 3.50mm particle）and concentrations （0.5% 1.0% 1.5% 2.0% ， 2.5% ， w on radish seed germination were investigated，using soil without PE microplastics as the control （CK）. Separately， the impacts of soil containing 1.5% PE powder and soil containing 1.5% PE particle on radish seedling growth were studied.Theresultsrevealed that compared with CK，both PE powderand PE particlesignificantlydelayed radish germination，with 0.5% PE powder showing the most significant delaying effect，though neither treatment significantly affected germinationrates.Compared with CK，both PEforms significantlydelayed the second trueleafemergencingtimeandreduced true leaves numberofseedlings.Additionaly，both treatmentssignificantlydecreased themaximum leaf length of seedlings，whilePE powder treatment significantlypromoted root elongationofradishseedlings.Furthermore，both PE powder and PE particle treatments significantly reduced the leaf biomass （0.08， ，totalbiomass （0.07， 0.10g） ，and shoot-root ratio of seedlings. In summary， this study demonstrates that both PE powder and particle significantlydelayradishseed germinationand inhibit seedling growth，withthesuppressionof leaf development（the emergence oftrue leaves was delayed，while their numbers，and biomass were reduced）beingthemost prominent manifestationof growth inhibition.PEexhibits time-dependent cumulative effectsand organ-specificinhibitionon seedling growth.

Keywords： Raphanus sativus;Microplastics; Seed germination; Seedling growing; Polyethylene

随着塑料制品的大量使用，微塑料（ Φ<5mm ）污染已成为全球性的环境问题[1-3]。（剩余11627字）