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61,005 resultsShowing papers similar to Spatio‐Temporal Variation of Soil Microplastics as Emerging Contamination After Application of Organic Mulching in Phyllostachys violascens Forests
ClearVertical distributions of microplastics in long-term mulched soils and their potential impacts on soil properties and microbial diversity
Microplastic concentrations were measured at different depths in agricultural soils that had been mulched with plastic film over many years, finding vertical stratification with higher concentrations near the surface. Long-term plastic mulching leads to progressive accumulation of microplastics throughout the soil profile.
Distribution characteristics of microplastics in soil profiles and aggregates of farmland with different mulching years
Researchers found that microplastic abundance in farmland soil increased linearly with years of plastic film mulching (20.9-54.2 items/g over 3-23 years), with highest concentrations in the 0-10 cm surface layer, decreasing with depth, and greater abundance in larger soil aggregates, using a random forest model to predict distribution patterns.
Microplastic diversity, risks and soil impacts: A multi-metric assessment across land-use systems
Researchers surveyed microplastic abundance, polymer diversity, and ecological risk across seven land-use types in India's Brahmaputra Valley, finding that built-up areas had the highest particle counts while forest soils paradoxically showed the greatest polymer hazard scores due to high-risk polymers, and that land-use type shapes both the quantity and composition of soil microplastic contamination.
Impact of plastic mulching on microplastic contamination in mountainous agricultural soils
Researchers examined how plastic mulching films affect microplastic contamination in remote mountainous agricultural soils in Kakani, Nepal, collecting soil samples from two depths across mulched farms, non-mulched farms, and adjacent forests and finding elevated MP concentrations in mulched plots.
Impact of plastic mulching on microplastic contamination in mountainous agricultural soils
Researchers examined how plastic mulching films affect microplastic contamination in remote mountainous agricultural soils in Kakani, Nepal, collecting soil samples from two depths across mulched farms, non-mulched farms, and adjacent forests and finding elevated MP concentrations in mulched plots.
Contamination of microplastics in greenhouse soil subjected to plastic mulching
This study quantified microplastic accumulation in greenhouse soils under different durations of plastic mulching, finding that longer mulching periods significantly increased MP concentrations in both topsoil and subsoil. Soil physicochemical properties were associated with MP contamination levels, suggesting soil type and organic matter influence MP retention.
Duration- and area-dependent influences of plastic film mulch on soil microplastics abundance
Researchers conducted a field campaign combined with remote sensing to investigate how the duration and coverage area of plastic film mulching affect microplastic abundance in agricultural soils in northern China's agro-pastoral ecotone, finding that microplastic concentrations ranged from 41.7 to 787.5 items per kilogram and positively correlated with mulching duration.
Microplastic Accumulation in Agricultural Soils with Different Mulching Histories in Xinjiang, China
Researchers found that microplastic accumulation in agricultural soils of Xinjiang, China increases significantly with mulching history, with fields mulched for over 20 years containing substantially more microplastics across all soil layers.
Vertical distribution and characteristics of soil microplastics under different land use patterns: A case study of Shouguang City, China
Researchers systematically investigated microplastic distribution across seven land use types and three soil depth layers in Shouguang City, China. The study found that greenhouse and polytunnel agricultural soils had the highest microplastic abundance, dominated by polyethylene and polypropylene film fragments, with concentrations decreasing with depth but still reaching 11-19% of total levels in the deepest layer at 40-60 centimeters.
Assessment on Microplastic Contamination from Mulching and Non-Mulching Farmland in Selangor, Malaysia
This Malaysian study characterized microplastics in soil from mulched and non-mulched farmland in Tanjung Karang, Selangor, analyzing abundance by depth and site. Mulched soils contained higher microplastic concentrations than non-mulched soils, and plastic films were the dominant particle type, consistent with mulch film fragmentation.
Occurrence and distribution of microplastics in coastal plain soils under three land-use types
Microplastic abundance and polymer composition were characterized in farmland, plantation, and orchard/secondary forest soils from 33 sites on the east China coastal plain. Farmland soils had significantly higher microplastic abundances than forest soils, with agricultural plastic mulching identified as the primary source of the dominant polyethylene film fragments.
Pollution Characteristics of Microplastics in Soils in Southeastern Suburbs of Baoding City, China
Researchers characterized microplastic pollution in soils from the southeastern suburbs of Beijing, finding widespread contamination across 12 sampling sites with fibers and fragments as the dominant forms, and highlighting agricultural activities and urban runoff as likely sources. The study contributes soil-ecosystem baseline data to a research area dominated by aquatic microplastic studies.
Exploring the Occurrence Characteristics of Microplastics in Typical Maize Farmland Soils With Long-Term Plastic Film Mulching in Northern China
A survey of 225 soil samples from maize farmland with long-term plastic film mulching in northern China found widespread microplastic contamination, with abundance, distribution, and polymer composition reflecting the history of film use and agricultural management practices.
Subsurface transport and environmental risks of microplastic pollution: influence of land use and seasonal variability
Researchers systematically investigated how microplastics move vertically through soil across five different land use types during pre-monsoon and post-monsoon seasons. Dumpsites had the highest microplastic concentrations at nearly 40,000 particles per kilogram, while woodlands had the lowest at around 500 particles per kilogram. The study found that smaller microplastics traveled deeper into soil, especially after monsoon rains, and that land use type significantly influenced both the amount and composition of microplastic contamination.
Accumulation of microplastics in greenhouse soil after long-term plastic film mulching in Beijing, China
Researchers found that microplastic contamination in Beijing greenhouse soils increased with the duration of plastic film mulching, with abandoned greenhouses accumulating the highest levels at over 2,200 particles per kilogram of soil.
Quantifying, and assessing the impact of, microplastics in terrestrial samples
Researchers developed methodologies to quantify microplastics (1 to 1000 micrometers) in terrestrial woodland environments, addressing the significant knowledge gap about microplastic concentrations and ecological impacts in soil ecosystems compared to the more extensively studied aquatic compartments.
Effects of land use on the distribution of soil microplastics in the Lihe River watershed, China
Researchers surveyed microplastic contamination across five different land use types in a Chinese river watershed. They found that urban soils had the highest microplastic levels, followed by agricultural areas, with woodland having the lowest, and that population density strongly correlated with microplastic diversity. The study suggests that human activity intensity and plastic waste disposal are the main drivers of soil microplastic pollution at the watershed scale.
Microbial Responses to an Urban–Suburban–Exurban Gradient in Forest Soils: Shifts in Community Structure and Membrane Lipid Composition
Not relevant to microplastics — this study examines how soil microbial communities and membrane lipid composition shift along an urban-to-rural gradient in China, driven by urbanization and soil depth; microplastics are not a focus of the research.
Macro- and micro-plastic accumulation in soils under different intensive farming systems: A case study in Quzhou county, the North China Plain
Soil samples from six farming systems in the North China Plain showed macroplastic abundances from 0.2 to 46.8 kg/ha and microplastic concentrations up to 3.7×10⁴ items/kg, with greenhouse and mulched vegetable fields showing the highest contamination.
Effects of soil properties and land use patterns on the distribution of microplastics: A case study in southwest China
Researchers surveyed microplastic contamination in soils across different land use types in Guizhou Province, southwest China. The study found that soil properties and land use patterns significantly influence microplastic abundance and distribution, with agricultural and urban soils generally showing higher contamination levels than less intensively managed areas.
Impact of Plastic Mulching on Microplastic Contamination in Mountainous Agricultural Soils
A study on plastic mulch use in agriculture found that it significantly increases microplastic contamination in soils, with particle concentrations rising with cumulative years of mulch application. The findings reinforce concerns about plastic mulching as a major contributor to agricultural soil microplastic pollution.
Spatial distribution of microplastics in Mollisols of the farmland in Northeast China: the role of field management and plastic sources
Researchers investigated how farmland management practices affect the distribution of microplastics in vegetable fields in Northeast China. They found seven types of plastic polymers in soil layers down to 30 centimeters, with larger macroplastic fragments being the primary source of microplastic contamination. Higher fertilization doses contributed more to microplastic generation than tillage frequency.
Temporal and Spatial Distribution of Residual Film in Soil Profile under Continuous Film Mulching
Eight years of continuous plastic mulch film use on Chinese farmland steadily increased the number of plastic fragments in soil, with smaller pieces migrating progressively deeper over time even as total plastic mass slowly declined. The finding that fragments accumulate below 10 cm — beyond the reach of most tillage — highlights how agricultural microplastic pollution can become entrenched and difficult to remediate.
Preliminary results on microplastic pollution from agricultural soil in Vietnam: Distribution, characterization, and ecological risk assessment
This first microplastic survey of Vietnamese agricultural soils found concentrations ranging from 1,700 to 38,800 items per kilogram, with soils near residential areas and manufacturing facilities showing concentrations roughly five times higher than remote agricultural land. Fibers dominated and most particles were under 1 mm, with the majority of sites assessed at hazard level IV — the highest ecological risk category. The study establishes a critical baseline for a country where agricultural plastic use is intensive and growing.