Video Experimental Relacionado

Updated: Jan 25, 2026

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

Microplásticos de polietileno de baja densidad convencionales inducen efectos adversos más fuertes en el sistema

Yixiu Wang¹, Hongyan Cheng², Chaodong Yang¹

¹College of Resource and Environment, Shanxi Agricultural University, Taigu, 030801, China.

Journal of environmental management

|January 23, 2026

Abstract:

Mulch residues are the most direct microplastics (MPs) source in agricultural soils. This study explored the impacts of MPs derived from conventional low-density polyethylene (LDPE) and biodegradable polylactic acid (PLA) mulch films on maize-soil-bacteria community system (both common and glutinous maize), and the accumulation of MP in maize roots. PLA MPs were found in vascular tissues (xylem/phloem) in common maize but only in cortical layers in glutinous maize, while LDPE MPs showed phloem-specific entry. In common maize, low-concentrations of PLA MPs (0.1 and 1 %) promoted maize growth and chlorophyll synthesis, whereas LDPE MPs consistently inhibited maize growth. PLA MPs increased soil organic carbon (SOC), total nitrogen (TN), and enzyme activity, whereas LDPE MPs decreased TN and catalase activity. Low-concentration PLA MPs increased bacterial diversity and altered bacterial community composition and pathways, while LDPE MPs exhibited inhibitory effects. PLA MP stimulated bacterial diversity at low concentrations and inhibited it at high concentrations, whereas LDPE MP showed consistent suppression. High LDPE MP concentrations significantly reduced the abundance of Chloroflexi, Proteobacteria, and Deinococcota, while increasing that of Firmicutes. Low LDPE MP concentrations impaired Carbon metabolism and Glycolysis/Gluconeogenesis (-3.80 and -7.23 %, respectively. Glutinous maize exhibited greater resistance than common maize. Structural equation modeling revealed that MP types and concentrations directly altered soil properties (-0.37, P < 0.05) and bacteria communities (0.65, P < 0.001) and indirectly inhibited maize growth. Our findings show that the potential hazards from MPs cannot be generalized and highlight the need to focus on variability among crop varieties.

Palabras clave:

Cultivo Acumulación de microplásticos Contaminación del suelo Modelado de ecuaciones estructurales Respuesta específica de la variedad

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