微塑料与镉对白菜生长及生理特性的影响

打开文本图片集

关键词：聚乙烯微塑料；镉；复合作用；盆栽实验；偏最小二乘路径模型中图分类号：S634;X503.231 文献标志码：A 文章编号：1672-2043（2025）11-2887-12 doi：10.11654/jaes.2024-1081

Abstract：Toinvestigatetheefectsof microplasticsandcadmium（Cd）onplantgrowthundersingleandcombinedcondions， polyethylenemicroplastics（PE-MPs），whicharewdelydistributedinthesoilenvironment，andcabbage（BrasicacampestrisL），a popularvegetableindailylife，wereusedinthepotexperiment.Throughindorpotexperiments，thediferenesincabbagegrowth， physiological indicators，and Cd uptake under different concentration gradients of PE-MPs （ 0.5% ， 2% 4% ）and Cd（1mg⋅kg-1） insingle andcombinedtreatmentswerestudied.TheresultsshowedthatbothPE-MPsandCdtreatmentssignificantlyinhibitedthegrowthof cabbage，withthetoxiceffctofsingleCdtreatmentbeingstrongerthanthatofsinglePE-MPstreatment.PE-MPsonlysignificantly reduced cabbage biomass at the high concentration of 4% ，and a similar trend was observed in the changes of chlorophyll content， especially at the high concentration（4 % ）. Low concentration （ 0.5% ）of PE-MPs alleviated the oxidative stress caused by Cd to some extent，butasteoncetrationofE-sireasd，tisigatingeectweakedndevetudintogravatedoidatiaage. The malondialdehyde（MDA） content in the medium and high concentration（ 2% and 4% ）PE-MPs and Cd combined treatment groups increased by 60.53% and 141.47% ，respectively，compared to the corresponding single PE-MPs treatments.Besides，the addition of PEMPsignificantlyrducedthecontentofavailableCdinthesoilbutdidnotsignificantlyalterteuptakeofCdbycabbage.Thersultsf partialleastsquarespathmodeling（PL-PM）indicatedthaundersingleE-Mstreatent，tequalityofcabbageasprimarilydiectlyandnegativelyaffctedbyE-MPsaddition.Incontrast，thecombinedtreatmentofPE-MPsandCdindirectlyinfluencedthequalityf Chinese cabbage by affecting its Cd content.

Keywords ： polyethylene microplastics; cadmium; combined effcts; pot experiment; PLS-PM

塑料是一种高分子有机材料，自从被人工合成以来，凭借其生产成本低以及轻质耐用等优点已成为人们日常生活中最常用的材料之一。（剩余22471字）