Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China.
Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China.
Environ Res. 2024 Dec 15;263(Pt 3):120201. doi: 10.1016/j.envres.2024.120201. Epub 2024 Oct 22.
Polyethylene microplastics (PE-MPs) have been widely reported for their adverse effects on soil ecosystems. However, there are fewer field studies on addressing PE-MPs contamination in soil. This study investigated the effects of PE-MPs on soil properties, rhizosphere soil microorganisms, and pea (Pisum sativum L.) nutrient composition in a field experiment and mitigated the effects of PE-MPs by adding MPs-degrading bacteria. The results showed that the addition of MPs-degrading bacteria mitigated the effects of PE-MPs on the hydrolyzable nitrogen content in the soil. In addition, the introduction of MPs-degrading bacteria resulted in an increase in the Shannon indices of microorganisms in the soil. This also effectively regulates the structure of the soil microbial community to be closest to that of normal soil. Notably, the addition of MPs-degrading bacteria increased the protein, starch, cellulose, and chlorophyll contents of pea grains. This study demonstrated the ability to improve the nutrient content of peas affected by MPs by adding MPs-degrading bacteria. This study contributes to our understanding of the effects of PE-MPs on soil-microbe-plant systems and provides new insights into the bioremediation of PE-MPs in agricultural soils.
聚乙烯微塑料 (PE-MPs) 对土壤生态系统的不良影响已被广泛报道。然而，针对土壤中 PE-MPs 污染的现场研究较少。本研究通过田间试验调查了 PE-MPs 对土壤性质、根际土壤微生物和豌豆（Pisum sativum L.）养分组成的影响，并通过添加可降解 MPs 的细菌来减轻 PE-MPs 的影响。结果表明，添加可降解 MPs 的细菌可减轻 PE-MPs 对土壤中水解氮含量的影响。此外，引入可降解 MPs 的细菌导致土壤中微生物的 Shannon 指数增加。这也有效地调节了土壤微生物群落的结构，使其最接近正常土壤。值得注意的是，添加可降解 MPs 的细菌增加了豌豆籽粒中蛋白质、淀粉、纤维素和叶绿素的含量。本研究证明了通过添加可降解 MPs 的细菌来提高受 MPs 影响的豌豆的养分含量的能力。本研究有助于我们了解 PE-MPs 对土壤-微生物-植物系统的影响，并为农业土壤中 PE-MPs 的生物修复提供了新的见解。
