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Purpose <p>The aim of this study was to compare the degradation of three types of commercially available biodegradable plastic bags in Croatia under managed (tilled, fertilized soil with herbicide application) and unmanaged (no mechanical or chemical treatment) soil conditions from the same geoenvironment. The research question focused on how soil management influences the soil microbial communities’ composition and mechanical properties during biodegradable plastic breakdown.</p> Methods <p>Biodegradable plastic bags were exposed to managed and unmanaged soils and retrieved after 3 and 6&#xa0;weeks. The changes in physical and mechanical properties, such as surface structure, tensile breaking force, breaking elongation, and mass per unit area, were assessed. Soil samples were also taken from the surface of the bags and the surrounding soil after 6 to evaluate microbial diversity and abundance using microbial analysis techniques.</p> Results <p>All three bag types degraded in both soil types. Soil management significantly influenced the microbial community composition and degradation rates of bags. The presence of biodegradable plastic bags reduced soil microbial diversity and altered the relative abundance of specific bacterial taxa.</p> Conclusion <p>The study highlights the variability in biodegradable plastic degradation under different soil management systems and its impact on microbial communities. It adds to the knowledge on the fate of biodegradable plastics in agricultural and natural (unmanaged) soil, which is urgently needed to better predict the risks associated with the ever-increasing usage of such products.</p>

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Breakdown of biodegradable polymer bags in soil under different management

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Martina Fileš,
  • Paula Dragičević,
  • Ana Bielen,
  • Anja Ludaš Dujmić,
  • Sanja Ercegović Ražić,
  • Sandra Hudina

摘要

Purpose

The aim of this study was to compare the degradation of three types of commercially available biodegradable plastic bags in Croatia under managed (tilled, fertilized soil with herbicide application) and unmanaged (no mechanical or chemical treatment) soil conditions from the same geoenvironment. The research question focused on how soil management influences the soil microbial communities’ composition and mechanical properties during biodegradable plastic breakdown.

Methods

Biodegradable plastic bags were exposed to managed and unmanaged soils and retrieved after 3 and 6 weeks. The changes in physical and mechanical properties, such as surface structure, tensile breaking force, breaking elongation, and mass per unit area, were assessed. Soil samples were also taken from the surface of the bags and the surrounding soil after 6 to evaluate microbial diversity and abundance using microbial analysis techniques.

Results

All three bag types degraded in both soil types. Soil management significantly influenced the microbial community composition and degradation rates of bags. The presence of biodegradable plastic bags reduced soil microbial diversity and altered the relative abundance of specific bacterial taxa.

Conclusion

The study highlights the variability in biodegradable plastic degradation under different soil management systems and its impact on microbial communities. It adds to the knowledge on the fate of biodegradable plastics in agricultural and natural (unmanaged) soil, which is urgently needed to better predict the risks associated with the ever-increasing usage of such products.