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<p>Biodegradable plastic mulch films (BMFs) have been used in agriculture as an alternative to conventional polyethylene mulches, offering benefits such as reduced labor costs and in-soil biodegradability. However, BMFs often degrade slowly, and fragments remain in the soil for multiple years. This study introduces a novel multi-layer agricultural mulch film (MLAMF) with poly(butylene adipate-co-terephthalate) (PBAT) outer layers and a thermoplastic starch (TPS) core, designed to enhance biodegradation and reduce plastic accumulation. In laboratory composting (LC), the MLAMF achieved 64% mass loss over 365 days, while pure PBAT films degraded by only 12%. In industrial composting (IC) conditions, the MLAMF and PBAT films showed 58% and 33% mass loss in 14 days, respectively. Respirometry tests indicate that the presence of TPS accelerates mineralization relative to the monolayer film. A small scale field trial revealed no statistically significant differences in onion yield or rot incidence between MLAMF and the commercial films.</p>

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Advancing sustainable agriculture: a novel multi-layer film approach to plastic mulching

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月3日

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  • Harshal J. Kansara,
  • Yvan D. Hernandez-Charpak,
  • Elizabeth M. Buck,
  • Jarmila Haseler,
  • Thomas A. Trabold,
  • Jeffrey S. Lodge,
  • Christopher L. Lewis,
  • Carlos A. Diaz

摘要

Biodegradable plastic mulch films (BMFs) have been used in agriculture as an alternative to conventional polyethylene mulches, offering benefits such as reduced labor costs and in-soil biodegradability. However, BMFs often degrade slowly, and fragments remain in the soil for multiple years. This study introduces a novel multi-layer agricultural mulch film (MLAMF) with poly(butylene adipate-co-terephthalate) (PBAT) outer layers and a thermoplastic starch (TPS) core, designed to enhance biodegradation and reduce plastic accumulation. In laboratory composting (LC), the MLAMF achieved 64% mass loss over 365 days, while pure PBAT films degraded by only 12%. In industrial composting (IC) conditions, the MLAMF and PBAT films showed 58% and 33% mass loss in 14 days, respectively. Respirometry tests indicate that the presence of TPS accelerates mineralization relative to the monolayer film. A small scale field trial revealed no statistically significant differences in onion yield or rot incidence between MLAMF and the commercial films.