农业环境科学学报2025，Vol.44Issue(6)：1477-1485,9.DOI:10.11654/jaes.2024-0660
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
Effects of single and composite contamination of polylactic acid microplastics and cadmium on wheat seed germination before and after ultraviolet aging
摘要
Abstract
In order to investigate the effects of degradable microplastics before and after aging and their combined pollution with heavy metals on seed germination.wheat(Triticum aestivum L.)was selected as the experimental plant,and different contents of polylactic acid microplastics(PLA,0,100,200,500,1 000,2 000,5 000,10 000 mg·kg-1)and cadmium(Cd,0,0.3,3 mg·kg-1)were used for single and compound contamination of wheat seed germination experiments.The results showed that the surface morphology of PLA microplastics changed from smooth to rough due to ultraviolet aging,and there was a significant difference in the germination rate of PLA on wheat seeds before and after aging in all treatments.The germination rate of wheat seeds was between 80.0%～96.7%,but neither single PLA,aged polylactic acid microplastic(APLA)pollution nor composite pollution had any significant effect on the germination rate of wheat seeds.Single PLA contamination had no significant effect on wheat bud length,but 5 000 mg·kg-1 PLA significantly inhibited wheat root length.200 mg·kg-1 APLA significantly inhibited malt growth,and the inhibition rate was as high as 29.8%.Under the combined contamination conditions of microplastics and Cd,PLA and 0.3 mg·kg-1 Cd inhibited the bud length and root length of wheat,and 100 mg·kg-1 APLA and 3 mg·kg-1 Cd promoted the growth of wheat bud length to the greatest extent,at this time,1.16 cm,0.3 mg·kg-1 Cd and APLA compound treatment had a greater effect on root length,and the difference between the shortest and longest root length was 1.26 cm.From the overall point of view of this experiment,the effect of microplastics and Cd on the germination rate of wheat was basically antagonistic,while the effect on the bud length and root length of wheat was basically synergistic.关键词
聚乳酸微塑料/紫外老化/镉/小麦/种子发芽Key words
polylactic acid microplastics/ultraviolet aging/cadmium/wheat/seeds germinate分类
农业科技引用本文复制引用
宋玉婷,陈苏,李林净,梁效,梁芳芳,吕蒙..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[J].农业环境科学学报,2025,44(6):1477-1485,9.基金项目
2022年度辽宁省教育厅基本科研项目面上项目(LJKMZ20221828) 2022 Liaoning Provincial Department of Education Basic Scientific Research Project(LJKMZ20221828) （LJKMZ20221828）
