Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Environmental Sources Human Health Effects Policy & Risk Remediation Sign in to save

Addition of inorganic nitrogen significantly increases the real and apparent priming effects of polyethylene and PHBV microplastics in soil

Journal of Hazardous Materials 2025 Score: 48 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Martine Graf, Davey L. Jones, Robert W. Brown, Robert W. Brown, Robert W. Brown, Perrine Florent, Martine Graf, Martine Graf, Martine Graf, Martine Graf, David R. Chadwick David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Benjamin I. Collins, Benjamin I. Collins, Martine Graf, Martine Graf, Martine Graf, Martine Graf, Perrine Florent, Robert W. Brown, Robert W. Brown, David R. Chadwick David R. Chadwick Davey L. Jones, Davey L. Jones, Martine Graf, Martine Graf, Davey L. Jones, Robert W. Brown, Davey L. Jones, Davey L. Jones, Davey L. Jones, Martine Graf, David R. Chadwick Martine Graf, Perrine Florent, Robert W. Brown, Robert W. Brown, Robert W. Brown, Martine Graf, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick Davey L. Jones, David R. Chadwick Sion Kennaway, David R. Chadwick Sion Kennaway, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick David R. Chadwick David R. Chadwick Benjamin I. Collins, Benjamin I. Collins, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Perrine Florent, David R. Chadwick Davey L. Jones, Perrine Florent, Robert W. Brown, Robert W. Brown, Davey L. Jones, David R. Chadwick David R. Chadwick Robert W. Brown, Robert W. Brown, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick Davey L. Jones, Davey L. Jones, David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick David R. Chadwick David R. Chadwick David R. Chadwick David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Benjamin I. Collins, David R. Chadwick Davey L. Jones, Davey L. Jones, Benjamin I. Collins, David R. Chadwick Davey L. Jones, David R. Chadwick David R. Chadwick David R. Chadwick David R. Chadwick Davey L. Jones, Davey L. Jones, Davey L. Jones, Davey L. Jones, David R. Chadwick

Summary

Researchers compared the effects of conventional polyethylene and biodegradable PHBV microplastics on soil organic matter turnover through priming effect experiments. Both MP types altered priming effects on native soil carbon and microbial biomass, with PHBV causing greater stimulation of microbial activity due to providing additional organic carbon.

Polymers

Plastic mulch films (PMFs) enhance crop productivity but degrade into microplastics, raising concerns about their effects on soil health. This study compared the effect of conventional polyethylene (PE) and biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) microplastics on soil organic matter (SOM) turnover through real (native SOM) and apparent (microbial biomass) priming effects. Using 14C-labelled assays, we assessed three microplastic loading rates (10, 100, 1000 kg ha-1) with addition of nitrogen (N) (80 kg N ha-1), and without. Comparing responses to inert sand and organic residues (clover, straw). Nitrogen addition significantly enhanced real priming in all treatments. PHBV caused dose-dependent (although non-significant) positive priming, greater than equivalent straw or clover loading. Generally, apparent priming was negative without N but positive with N, suggesting microbial responses depend on substrate stoichiometry and accessibility. Microbial (16S rRNA and ITS2) sequencing showed that N addition mainly drove bacterial community changes, while PHBV uniquely altered fungal communities, increasing Ascomycota dominance in a dose-dependent manner. PE behaved similarly to inert sand, indicating minimal impact on SOM turnover. While biodegradable plastics reduce conventional microplastic accumulation, PHBV may enhance SOM loss via priming (with no direct analogue found in this study), with potential long-term consequences for soil carbon stocks. These findings emphasise the importance of evaluating biodegradable plastics within broader soil nutrient and carbon cycling frameworks.

Read via DOI PubMed Download PDF

Share this paper

Post Share Share Pin Email