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Microplastics in agricultural soil: Unveiling their role in shaping soil properties and driving greenhouse gas emissions

The Science of The Total Environment 2024 13 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhimin Xu, Huankai Li, Zhimin Xu, Zhimin Xu, Zhimin Xu, Zhimin Xu, Zhimin Xu, Zhimin Xu, Zhimin Xu, Zhimin Xu, Xinyue Wu, Huankai Li, Lihong Lin, Lihong Lin, Xinyue Wu, Lihong Lin, Xinyue Wu, Xinyue Wu, Xingying Deng, Lihong Lin, Xinyue Wu, Xingying Deng, Huankai Li, Xinyue Wu, Lihong Lin, Lihong Lin, Lin Zheng, Lin Zheng, Xinyue Wu, Xingying Deng, Lei Wang, Xingying Deng, Xingying Deng, Xingying Deng, Lihong Lin, Xingying Deng, Lihong Lin, Xingying Deng, Xingying Deng, Lei Wang, Xingying Deng, Xingying Deng, Xingying Deng, Xinyue Wu, Xingying Deng, Xinyue Wu, Xinyue Wu, Lin Zheng, Yifan Wang Yifan Wang Yifan Wang Huankai Li, Huankai Li, Xinyue Wu, Yifan Wang Jianlin Shen, Yifan Wang Weimin Sun, Zhimin Xu, Zhimin Xu, Yifan Wang

Summary

This review examines how microplastics in agricultural soils affect carbon and nitrogen cycles and alter greenhouse gas emissions. Researchers found that microplastics reduce soil water retention, decrease soil respiration, and increase emissions of carbon monoxide, methane, and nitrous oxide. The study reveals that microplastic contamination in farmland may have broader climate implications by disrupting the soil processes that regulate greenhouse gas fluxes.

Microplastics (MPs) contamination is pervasive in agricultural soils, significantly influencing carbon and nitrogen biogeochemical cycles and altering greenhouse gas (GHG) fluxes. This review examines the sources, status, mechanisms, and ecological consequences of MPs pollution in agricultural soils, with a focus on how MPs modified soil physicochemical properties and microbial gene expression, ultimately impacting GHG emissions. MPs were found to reduce soil water retention, decreasing soil respiration and increasing emissions of CO, CH₄, and NO. They also enhanced soil aggregate stability and influenced soil organic carbon (SOC) sequestration, contributing further to GHG emissions. MPs-induced increases in soil pH were associated with suppressed CH₄ and NO emissions, whereas the abundance of genes encoding enzymes for cellulose and lignin decomposition (e.g., abfA and mnp) stimulated enzyme activity, intensifying NO release. Additionally, a reduced soil C/N ratio promoted denitrification processes. Changes in microbial communities, including increases in Actinomycetes and Proteobacteria, were observed, with a rise in genes associated with carbon cycling (abfA, manB, xylA) and nitrification-denitrification (nifH, amoA, nirS, nirK), further exacerbating CO and NO emissions. This review provides valuable insights into the complex roles of MPs in GHG dynamics in agricultural soils, offering perspectives for improving environmental management strategies.

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