Do Added Microplastics, Native Soil Properties, and Prevailing Climatic Conditions Have Consequences for Carbon and Nitrogen Contents in Soil? A Global Data Synthesis of Pot and Greenhouse Studies

文献类型： 外文期刊

第一作者： Iqbal, Shahid

作者： Iqbal, Shahid;Gui, Heng;Schaefer, Douglas Allen;Iqbal, Shahid;Xu, Jianchu;Gui, Heng;Schaefer, Douglas Allen;Arif, Muhammad Saleem;Worthy, Fiona R.;Jones, Davey L.;Jones, Davey L.;Khan, Sehroon;Nadir, Sadia;Alharbi, Sulaiman Ali;Filimonenko, Ekaterina;Bu, Dengpan;Shakoor, Awais;Shakoor, Awais;Kuzyakov, Yakov;Kuzyakov, Yakov;Kuzyakov, Yakov;Xu, Jianchu

作者机构：

关键词： ecosystem response; emergingpollutant; nutrientcycling; soil health; soil organic matter

期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：11.4； 五年影响因子：12.0 ）

ISSN： 0013-936X

年卷期： 2024 年 58 卷 19 期

页码：

收录情况： SCI

摘要： Microplastics threaten soil ecosystems, strongly influencing carbon (C) and nitrogen (N) contents. Interactions between microplastic properties and climatic and edaphic factors are poorly understood. We conducted a meta-analysis to assess the interactive effects of microplastic properties (type, shape, size, and content), native soil properties (texture, pH, and dissolved organic carbon (DOC)) and climatic factors (precipitation and temperature) on C and N contents in soil. We found that low-density polyethylene reduced total nitrogen (TN) content, whereas biodegradable polylactic acid led to a decrease in soil organic carbon (SOC). Microplastic fragments especially depleted TN, reducing aggregate stability, increasing N-mineralization and leaching, and consequently increasing the soil C/N ratio. Microplastic size affected outcomes; those <200 mu m reduced both TN and SOC contents. Mineralization-induced nutrient losses were greatest at microplastic contents between 1 and 2.5% of soil weight. Sandy soils suffered the highest microplastic contamination-induced nutrient depletion. Alkaline soils showed the greatest SOC depletion, suggesting high SOC degradability. In low-DOC soils, microplastic contamination caused 2-fold greater TN depletion than in soils with high DOC. Sites with high precipitation and temperature had greatest decrease in TN and SOC contents. In conclusion, there are complex interactions determining microplastic impacts on soil health. Microplastic contamination always risks soil C and N depletion, but the severity depends on microplastic characteristics, native soil properties, and climatic conditions, with potential exacerbation by greenhouse emission-induced climate change.

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