Short-term effects of microplastics and earthworms on greenhouse gases emissions from a sandy-loam soil

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2025-04-01 DOI:10.1016/j.pedobi.2025.151036

Wenjing Ma , Daiyu Qiao , Huijie Lu , Carmelo Maucieri , Cancan Zhao , Lei Su , Yaojun Zhang

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Abstract

The widespread use of plastics in agriculture has led to the co-existence of microplastics (MPs) and earthworms in soil ecosystems. While both MPs and earthworms are known to influence soil greenhouse gas (GHG) emissions, their interactive effects on CO₂, N₂O, and CH₄ emissions remain poorly understood. To address this gap, a 21-day incubation experiment was conducted to examine the impact of MPs (0 %, 0.1 %, 0.5 %, 1 %) on soil GHG emissions in the presence and absence of earthworms. The results showed that MPs significantly reduced cumulative N₂O emission and enhanced CH₄ oxidation, with effects intensifying at higher concentrations, but had no significant effect on CO₂ emissions. In contrast, earthworms increased soil CO₂ and N₂O emissions while promoting CH₄ oxidation. MPs also lowered the global warming potential (GWP) by reducing N₂O emissions, whereas earthworms had an opposite effect. Interestingly, MPs reduced earthworm mortality in this study. Additionally, the interaction between MPs and earthworms significantly influenced soil pH and mineral N (NH₄⁺-N and NO₃^--N) content. These findings the critical role of earthworms in amplifying soil CO₂ and N₂O emissions and CH₄ oxidation. This study provides new insights into GHG emissions in sandy-loam soils under the combined influence of MPs and earthworms.

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微塑料和蚯蚓对沙质壤土温室气体排放的短期影响

塑料在农业中的广泛使用导致土壤生态系统中微塑料（MPs）和蚯蚓共存。虽然已知MPs和蚯蚓都会影响土壤温室气体（GHG）排放，但它们对CO2、N2O和CH4排放的相互作用仍知之甚少。为了解决这一差距，进行了一项为期21天的孵化实验，以研究在蚯蚓存在和不存在的情况下，MPs（0 %、0.1 %、0.5 %、1 %）对土壤温室气体排放的影响。结果表明，MPs显著降低了N2O的累积排放，促进了CH4的氧化，且浓度越高，效果越明显，但对CO2的排放没有显著影响。蚯蚓增加了土壤CO2和N2O的排放，同时促进了CH4的氧化。MPs还通过减少一氧化二氮的排放来降低全球变暖潜能值（GWP），而蚯蚓则有相反的效果。有趣的是，在这项研究中，MPs降低了蚯蚓的死亡率。此外，MPs与蚯蚓的交互作用显著影响了土壤pH和矿质N （NH4+-N和NO3——N）含量。这些发现表明蚯蚓在增加土壤CO2和N2O排放以及CH4氧化中的关键作用。本研究对MPs和蚯蚓共同作用下的沙壤土温室气体排放提供了新的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.