| 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. |
| 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 |
| 投稿时间：2024-08-07 |
| DOI：10.11654/jaes.2024-0660 |
| 中文关键词: 聚乳酸微塑料 紫外老化 镉 小麦 种子发芽 |
| 英文关键词: polylactic acid microplastics ultraviolet aging cadmium wheat seeds germinate |
| 基金项目:2022年度辽宁省教育厅基本科研项目面上项目（LJKMZ20221828） |
|
| 摘要点击次数: 1574 |
| 全文下载次数: 1571 |
| 中文摘要: |
| 为探讨可降解微塑料老化前后及其与重金属复合污染对种子发芽的影响，本研究选取小麦（Triticum aestivum L.）为实验植物，选取不同含量的紫外老化前后的聚乳酸微塑料（PLA，0、100、200、500、1 000、2 000、5 000、10 000 mg·kg-1）和镉（Cd，0、0.3、3mg·kg-1）分别进行单一和复合污染的小麦种子萌发实验。结果表明：紫外老化使得聚乳酸微塑料的表面形态由光滑变为粗糙，且所有处理中老化前后PLA对小麦种子的发芽率具有显著差异，小麦种子的发芽率在80.0%~96.7%之间，但无论是单一老化前后PLA污染还是复合污染对小麦种子的发芽率均没有显著影响；单一PLA污染对小麦芽长的影响不显著，5 000 mg·kg-1 PLA显著抑制了小麦根长；200 mg·kg-1老化后的聚乳酸微塑料（APLA）显著抑制了小麦芽长，且抑制率高达29.8%；微塑料和Cd复合污染条件下，PLA与0.3 mg·kg-1 Cd处理抑制了小麦的芽长、根长，100 mg·kg-1 APLA与3 mg·kg-1 Cd处理最大程度促进了小麦芽长的生长，此时芽长为1.16 cm，0.3 mg·kg-1 Cd与APLA复合处理对根长的影响较大，最短与最长的根长之间相差1.26 cm。研究表明，微塑料与Cd复合污染对小麦的发芽率的影响基本表现为拮抗作用，而对小麦的芽长和根长基本表现为协同作用。 |
| 英文摘要: |
| 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 and3 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. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
