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Related Concept Videos

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  1. Home
  3. Enhancing Soil Gross Nitrogen Transformation Through Regulation Of Microbial Nitrogen-cycling Genes By Biodegradable Microplastics.
  1. Home
  3. Enhancing Soil Gross Nitrogen Transformation Through Regulation Of Microbial Nitrogen-cycling Genes By Biodegradable Microplastics.

Related Experiment Video

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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Enhancing soil gross nitrogen transformation through regulation of microbial nitrogen-cycling genes by biodegradable

Hao Zhang1, Wei Zhu2, Jinbo Zhang3

  • 1Research Center for cultural Landscape Protection and Ecological Restoration, China-Portugal Belt and Road Cooperation Laboratory of Cultural Heritage Conservation Science, Gold Mantis School of Architecture, Soochow University, Suzhou 215006, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.

Journal of Hazardous Materials
|August 18, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Biodegradable microplastics (MPs) significantly boost soil nitrogen cycling and plant uptake compared to conventional MPs. This is due to increased microbial activity and nutrient availability, impacting soil health.

Keywords:
(15)NGross N transformationMicroplasticsMineralizationN-cycling geneNitrification

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Area of Science:

  • Environmental Science
  • Soil Science
  • Microbiology

Background:

  • Agricultural plastic film mulching is widespread, introducing microplastics (MPs) into soils.
  • The impact of biodegradable MPs on soil nitrogen (N) dynamics and crop N uptake is not well understood.

Purpose of the Study:

  • To investigate the effects of conventional (polyethylene, PE) and biodegradable (polybutylene adipate co-terephthalate, PBAT) MPs on soil gross N transformations.
  • To determine the influence of MPs on crop N uptake and soil microbial N-cycling gene abundance.

Main Methods:

  • A paired labeling 15N tracer experiment was conducted.
  • Soil samples were amended with PE and PBAT MPs at 0%, 0.5%, and 2% (w/w).
  • Microbial N-cycling gene analysis was performed.

Main Results:

  • Biodegradable MPs increased gross N mineralization (0.5-16 times) and plant N uptake (16-32%) compared to control and conventional MPs.
  • High MP concentrations (2%) generally increased gross N mineralization.
  • MPs altered gross nitrification and immobilization rates, with biodegradable MPs showing distinct effects.
  • Biodegradable MPs increased N-cycling gene abundance (60-103%), while conventional MPs did not significantly alter it.

Conclusions:

  • Biodegradable MPs enhance soil N cycling and crop N uptake by increasing microbial biomass and nutrient availability.
  • Both the concentration and material type of MPs influence soil N transformation processes.
  • Findings highlight the potential short-term consequences of biodegradable MPs on soil N dynamics.