紫外老化前后聚乳酸微塑料和镉及其复合污染对小麦种子萌发的影响

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中图分类号：S512.1；X53 文献标志码：A 文章编号：1672-2043（2025）06-1477-09 doi：10.11654/jaes.2024-0660

Effects of singleand composite contamination of polylactic acid microplastics and cadmium on wheat seed germination before and after ultraviolet aging

SONG Yuting，CHEN Su*，LI Linjing，LIANG Xiao，LIANG Fangfang，LU Meng （College of Environmental Engineering，Shenyang University，Shenyang11Oo44，China）

Abstract：Inordertoinvestigatethefectsofdegradablemicroplasticsbeforeandafteragingandtheircombiedpolutionwitheavy metalsonedgerinatioeat（iticmestiumL.）asseletedasteexperimentalplant，nddierentcotentsofpllacticacid microplastics（PLA，0，100，200，500，1000，2 000，5 000，10 000 mg kg-1 ）and cadmium（Cd， 0， 0.3，3 mg·kg-1 ）were used for single and compoundcontaminationofwheatsedgerminationexperiments.Theresultsshowedthatthesurface morphologyofPLAmicroplastics changedfromsmoothtooughduetoultravioletaging，andterewasasignfcantdifereceinthegerinationateofAonhatds beforeandafteraginginalltreatments.Thegerminationrateofheatsedswasbtween8O.0%＼～96.7%，butneithersinglePLAaged polylacticacidmicroplastic（APLA）polutionorcompositeolutionhadanysignificantefectontegerminationrateofwhatsds. SinglePLA contaminationhad no significant effect onwheatbud length，but 5000mg⋅kg-1PLA significantlyinhibitedwheatroot length. （204号 200mg⋅kg-1 APLAsignificantlyinhibited malt growth，andtheinhibitionrate wasashigh as29.8%.Under thecombined contamination conditions of microplastics and Cd，PLA and 0.3mg⋅kg-1 Cd inhibited the bud length and root length of wheat，and 100 mg·kg-1 APLA and 3mg⋅kg-1Cd promoted the growth of wheat bud length to the greatest extent，at this time， 1.16cm ， 0.3mg⋅kg-1 Cd and APLA compound treatmenthadageaterefectootlngthndtedierecebtwenthsortesandlongestotlengthas1.26c.Fooal pointfiewoftisexperient，thefectoficrolasticsandCdonthegerinationrateofwhatasbasicallantagonstchilete effect on the bud length and root length of wheat was basically synergistic.

Keywords：polylactic acid microplastics; ultraviolet aging;cadmium; wheat; seeds germinate

塑料因其延展性好、价格低廉、耐用、轻质的特点，在日常生活中被广泛使用。（剩余16808字）