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Polylactic acid microplastics regulate organophosphorus pesticide impacts on phosphorus bioavailability in soil-plant systems
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Researchers showed that polylactic acid microplastics alter how the organophosphorus pesticide chlorpyrifos affects phosphorus cycling in soil-plant systems, modifying rhizosphere alkaline phosphatase activity and phosphorus bioavailability in rice — highlighting the compounding ecological risks when biodegradable plastics co-occur with agricultural contaminants.
-Pi at the heading stage. CPF alone only affected rhizosphere alkaline phosphatase activity (ALP), while CPF+PLA-MPs exerted effects on non-rhizosphere ALP activity depending on CPF dose and growth stages. These findings indicate that PLA-MPs regulate CPF fate and induce combined effects on plant growth and P cycling in soil-plant system, providing new insights into the ecological risks of multi-contaminants and environmental implications of biodegradable plastics.
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Chlorpyrifos degradation and its impacts on phosphorus bioavailability in microplastic-contaminated soil
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This study found that microplastics made from polylactic acid (a biodegradable plastic) in soil changed how the pesticide chlorpyrifos breaks down and altered the availability of phosphorus, a key nutrient for crops. The microplastics slowed pesticide degradation and affected soil enzyme activity, which could impact both food safety and crop nutrition. The findings show that even biodegradable microplastics can disrupt important soil processes that affect the food supply.
Impact of Microplastic Contamination on Phosphorus Availability, Alkaline Phosphatase Activity, and Polymer Degradation in Soil
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Researchers studied how different types of microplastics at various concentrations affect phosphorus availability and enzyme activity in soil. They found that microplastics altered phosphorus cycling both by directly supplying phosphorus in some cases and by changing microbial enzyme function. The study suggests that microplastic contamination could disrupt soil nutrient dynamics important for maintaining agricultural productivity.
Effects of microplastic properties and dissolved organic matter on phosphorus availability in soil and aqueous mediums
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Researchers studied how different types of microplastics from agricultural mulching films affect phosphorus availability in soil and water. They found that both conventional plastics like polyethylene and biodegradable plastics like polylactic acid significantly reduced available phosphorus in soil, with smaller and more concentrated particles causing the greatest reductions. The study suggests that microplastic accumulation in agricultural soils may impair nutrient availability for crops.
Effects of microplastics pollution on plant and soil phosphorus: A meta-analysis
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Across 781 observations from 73 studies, microplastics significantly reduced plant phosphorus uptake and soil available phosphorus while increasing soil phosphorus leaching. Biodegradable microplastics caused stronger negative effects on soil phosphorus than conventional plastics, and impacts worsened with higher concentrations and longer exposure times.
Discrepant effects of microplastics on soil phosphorus availability under different phosphorus fertilizer applications
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Researchers studied how polyethylene and polylactic acid microplastics interact with different types of phosphorus fertilizers in soil over 56 days. They found that microplastics reduced the amount of plant-available phosphorus in organically fertilized soils by up to 29%, while increasing it in soils treated with mineral fertilizer. The findings suggest that microplastic contamination in farmland could alter how effectively crops access essential nutrients depending on the fertilizer type used.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.