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Papers
20 resultsShowing papers similar to Research on the Effects of Aging Microplastics on Soil Nitrogen and Dissolved Organic Matter in Dryland Soil
ClearEffects of Microplastics and Organic Fertilizer Regulation on Soil Dissolved Organic Matter Evolution
This study examined how microplastic addition to soil affects dissolved organic matter (DOM) evolution, focusing on the interactions between microplastics as carbon sources and organic fertilizer. Microplastics altered DOM composition and quantity, with effects on soil carbon cycling that varied by plastic type and organic fertilizer combination, suggesting complex interactions between plastic pollution and soil amendment practices.
Effects of Microplastics Addition on Soil Available Nitrogen in Farmland Soil
Researchers conducted soil incubation experiments adding polyethylene microplastics at varying concentrations to farmland soil from Fujian Province, China, finding that microplastics altered soil available nitrogen dynamics by affecting nitrate, ammonium, and dissolved organic nitrogen levels as well as soil microbial communities.
Differential aging processes of microplastics in paddy soil under wet-dry alternation: Insights into chemical structure alteration and dissolved organic matter formation
Researchers investigated the aging of polyethylene, polypropylene, and polystyrene microplastics in paddy soil during seven wet-dry alternation cycles over 98 days and found that cycling conditions accelerated chemical degradation and altered dissolved organic matter (DOM) composition. PE aged most rapidly, and the DOM produced differed structurally from that generated under constant conditions.
Diverse Impactsof Microplastic-derived DissolvedOrganic Matter at Environmentally Relevant Concentrations on SoilDissolved Organic Matter Transformation
Researchers examined how dissolved organic matter derived from agricultural microplastic mulches affects soil DOM transformation in yellow and black soils at environmentally relevant concentrations. They found that microplastic-derived DOM altered soil DOM dynamics in ways that could affect nutrient cycling and soil ecosystem function even at low, realistic exposure levels.
Microplastic presence significantly alters soil nitrogen transformation and decreases nitrogen bioavailability under contrasting temperatures
Researchers found that both polyethylene and biodegradable PLA microplastics significantly decreased soil nitrogen bioavailability at 25 degrees Celsius by reducing nitrate and mineral nitrogen levels, with effects varying between clay and sandy loam soils.
Effect of different polymers of microplastics on soil organic carbon and nitrogen – A mesocosm experiment
Researchers found that adding polyethylene and biodegradable microplastics to agricultural soil altered carbon and nitrogen dynamics, with biodegradable microplastics having stronger effects on soil organic carbon decomposition and nutrient cycling than conventional plastics.
Effects of microplastic contamination on soil nitrogen and its bioavailability in soybean-maize rotation system
Researchers conducting a field experiment found that microplastics in agricultural soil disrupt the nitrogen cycle in a soybean-maize rotation system, inhibiting the natural nitrogen fixation that legumes provide and increasing the conversion of ammonium to nitrate — a form more prone to leaching away — raising concerns for long-term soil fertility.
Microplastics affect organic nitrogen in sediment: The response of organic nitrogen mineralization to microbes and benthic animals
Researchers investigated how different types of microplastics affect organic nitrogen cycling in sediments, measuring the responses of key nitrogen-transforming microorganisms. They found microplastics alter the composition of organic nitrogen and suppress certain nitrogen cycling processes.
Living in the plastic age - Different short-term microbial response to microplastics addition to arable soils with contrasting soil organic matter content and farm management legacy
Adding polyethylene or polypropylene microplastics to two agricultural soils did not severely disrupt overall microbial activity or nitrogen cycling, but polypropylene reduced microbial biomass, especially in the organically managed soil. The results suggest that soil management history influences how resilient soil microbiomes are to microplastic contamination.
Polyethylene microplastic and soil nitrogen dynamics: Unraveling the links between functional genes, microbial communities, and transformation processes
Researchers conducted a six-month experiment to understand how polyethylene microplastics in soil affect nitrogen cycling, a process critical for soil fertility and plant nutrition. They found that while total nitrogen levels stayed stable, microplastics significantly altered the forms of nitrogen present by increasing ammonium and nitrate while decreasing dissolved organic nitrogen. The study suggests that microplastics reshape soil microbial communities and their nitrogen-processing activities, potentially disrupting the natural nutrient balance in agricultural soils.
Microplastic pollution on the soil and its consequences on the nitrogen cycle: a review
This review examines microplastic pollution impacts on soil nitrogen cycling, finding that microplastics alter soil structure, serve as novel microbial colonization surfaces, and affect the microbial communities responsible for nitrogen fixation, nitrification, and denitrification.
Effects of microplastics exposure on soil inorganic nitrogen: A comprehensive synthesis
Meta-analysis of 216 observations from 47 studies showed microplastics exposure significantly reduced soil nitrate concentration by 7.89% overall, but had no significant effect on ammonium. Microplastic polymer type was the strongest predictor of nitrate effects, and exposure above 27C actually enhanced soil nitrate, highlighting a concerning interaction with global warming.
Effects and mechanism of microplastics on organic carbon and nitrogen cycling in agricultural soil: A review
This review summarizes how microplastic pollution in agricultural soils affects carbon and nitrogen cycling by altering soil properties, microbial communities, and enzymatic activity. Evidence indicates that microplastics can change organic matter degradation rates and nutrient cycling processes, with implications for soil health and agricultural productivity.
Spatiotemporal heterogeneous effects of microplastics input on soil dissolved organic matter (DOM) under field conditions
Researchers conducted a long-term field experiment and found that microplastic inputs have spatiotemporally heterogeneous effects on soil dissolved organic matter (DOM), with implications for soil carbon dynamics under increasing terrestrial plastic contamination.
Microplastics InfluenceDissolved Organic Matter TransformationMediated by Microbiomes in Soil Aggregates
A 450-day incubation study found that microplastics altered dissolved organic matter (DOM) transformation in soil aggregates by disrupting microbiome composition and activity, with effects differing between macro- and micro-aggregate fractions.
Microplastics Influence Dissolved Organic Matter Transformation Mediated by Microbiomes in Soil Aggregates
Researchers conducted a 450-day experiment to study how microplastics alter the transformation of dissolved organic matter within soil aggregates, a process critical for soil stability and fertility. They found that microplastics destabilized organic matter in larger soil clumps while increasing its chemical complexity in smaller ones, with biodegradable plastics having the strongest effects. These changes were driven by shifts in microbial communities, suggesting that microplastic pollution could fundamentally alter how carbon cycles through agricultural soils.
Aging of biodegradable microplastics and their effect on soil properties: Control from soil water
Researchers studied how biodegradable microplastics made from PLA and PBAT break down in different soil types under varying water conditions. They found that while these plastics aged more in dry and alternating wet-dry conditions, flooded conditions caused bigger changes to soil chemistry, including increased dissolved organic carbon. The study suggests that even biodegradable plastics can meaningfully alter soil properties, and the effects depend heavily on moisture conditions.
Key factors and mechanisms of microplastics’ effects on soil nitrogen transformation: A review
This review systematically analyzed how microplastics affect nitrogen transformation processes in soil. Researchers found that the size, shape, concentration, and polymer type of microplastics all influence soil nitrogen cycling through changes to microbial communities, soil structure, and enzyme activity. The study identifies key knowledge gaps and recommends standardized research approaches to better predict how microplastic pollution will alter soil nutrient dynamics.
Diverse Impacts of Microplastic-derived Dissolved Organic Matter at Environmentally Relevant Concentrations on Soil Dissolved Organic Matter Transformation
Researchers examined how dissolved organic matter leached from biodegradable and conventional agricultural mulch microplastics affects soil chemistry at environmentally realistic concentrations. They found that UV-exposed microplastic leachates were more bioavailable and caused greater changes to soil organic matter than those produced in dark conditions. The study suggests that even at low concentrations, microplastic-derived compounds can meaningfully alter soil carbon dynamics, with effects varying by soil type.
Evaluating the impacts of microplastics on agricultural soil physical, chemical properties, and toxic metal availability: An emerging concern for sustainable agriculture
This study tested how five common types of microplastics affect soil properties and heavy metal availability in agricultural soil over 90 days. Microplastics changed soil structure, nutrient levels, and water-holding capacity, and actually reduced the availability of toxic heavy metals at higher plastic concentrations -- highlighting the complex ways plastic pollution is altering the farmland that produces our food.