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Temporal and Spatial Distribution of Residual Film in Soil Profile under Continuous Film Mulching

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  • Xiaoting Yang

    (Collage of Resources and Environment Sciences, Jilin Agricultural University, Changchun 130118, China
    Soil and Fertilizer Station of Jilin Province, Changchun 130033, China
    These authors contributed equally to this work.)

  • Wei Fan

    (Collage of Resources and Environment Sciences, Jilin Agricultural University, Changchun 130118, China
    Institute of Agricultural Environment and Resources, Jilin Academy of Agricultural Sciences, Changchun 130033, China
    These authors contributed equally to this work.)

  • Jinggui Wu

    (Collage of Resources and Environment Sciences, Jilin Agricultural University, Changchun 130118, China)

  • Yan Lv

    (Soil and Fertilizer Station of Jilin Province, Changchun 130033, China)

  • Wenyue Zhu

    (Jilin Academy of Agricultural Sciences, Jilin City 132011, China)

  • Hongguang Cai

    (Institute of Agricultural Environment and Resources, Jilin Academy of Agricultural Sciences, Changchun 130033, China)

Abstract

Plastic pollution in farmland soil has become a significant concern for scientists studying farmland ecosystems. However, the current research focus on the environmental impacts of plastics in soil overlooks crucial factors such as sources, distribution, and persistence. In this study, we examined the distribution of residual film after eight years of film mulching in mid-April 2018. We also assessed changes in spatial distribution from 2018 to 2020. Our findings reveal that eight years of film mulching significantly increased the quantity of agricultural mulch film residues in the soil. The size of residual film fragments varied from 0.25 cm 2 to 109 cm 2 , and the average size, number, and quantity of residues were influenced by soil depth. There was a noticeable downward trend in the quantity of agricultural mulch film residues, decreasing annually by 0.525 kg·ha −1 . In contrast, the number of residual films showed an average annual growth rate of 2.13 × 10 5 p·ha −1 . Importantly, we observed a substantial accumulation of residual film fragments below the 10 cm soil layer over time. Fragments ranging from 1–5 cm 2 were the most abundant and gradually accumulated in deeper soil layers, enhancing mulching film recovery efficiency. This study provides valuable insights into the influence of mulch cycles on farmland soil profiles, identifying the key locations and size-to-shape ratios of residual films. These findings serve as a theoretical foundation for implementing effective measures to control mulch film pollution in agricultural practices.

Suggested Citation

  • Xiaoting Yang & Wei Fan & Jinggui Wu & Yan Lv & Wenyue Zhu & Hongguang Cai, 2023. "Temporal and Spatial Distribution of Residual Film in Soil Profile under Continuous Film Mulching," Sustainability, MDPI, vol. 15(21), pages 1-10, November.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:21:p:15534-:d:1272551
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    References listed on IDEAS

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    1. Luca Nizzetto & Sindre Langaas & Martyn Futter, 2016. "Pollution: Do microplastics spill on to farm soils?," Nature, Nature, vol. 537(7621), pages 488-488, September.
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