Scholarlink

<p>The extensive use of plastics in agriculture has resulted in the accumulation of macroplastics (MAPs, &gt;5 mm) and microplastics (MPs, ≤5 mm) in agricultural soils, posing risks to soil functioning and food security. However, the relative contributions of different input pathways to soil MPs remain insufficiently quantified, particularly within intensively plastic-mulched systems. This study quantified and comparatively evaluated multiple MP input pathways within representative long-term plastic film mulch (PFM)-dominated farmlands in China. A large-scale field investigation (266 samples for MP analysis and 29 soil samples for MAP analysis, collected across 27 counties in Yunnan, Gansu, and Shandong Provinces) was integrated with a material flow analysis (MFA) modelling framework to assess source contributions under a defined system boundary. MAP and MP concentrations were highest in Yunnan (120.9 kg ha<sup>−</sup><sup>1</sup>; 7.3 × 10<sup>5</sup> items kg<sup>−</sup><sup>1</sup>), followed by Gansu (94.0 kg ha<sup>−</sup><sup>1</sup>; 6.1 × 10<sup>5</sup> items kg<sup>−</sup><sup>1</sup>) and Shandong (61.2 kg ha<sup>−</sup><sup>1</sup>; 4.0 × 10<sup>5</sup> items kg<sup>−</sup><sup>1</sup>). Model results showed that PFM contributed 19.0 ± 3.1%, 0.7 ± 0.1%, and 4.3 ± 0.9% of soil MPs in Yunnan, Gansu, and Shandong, respectively. Compost, irrigation water, and atmospheric deposition were also identified as relevant pathways. Within the defined study boundary and modelling assumptions, non-PFM pathways, particularly atmospheric deposition, may contribute substantially to soil MP inputs in plastic-mulched systems. These results highlight the importance of integrating multiple pathways for comparative source assessment and for developing more targeted agricultural plastic management strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The contribution of plastic film mulch to microplastics in agricultural soils was highly overestimated

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月6日

查看全文
  • Siyang Ren,
  • Kai Wang,
  • Jinrui Zhang,
  • Liyuan Chen,
  • Martine Graf,
  • Perrine Florent,
  • Ruimin Qi,
  • Jixiao Cui,
  • Xiuting Liu,
  • Kaijing Qu,
  • Yiran Zhang,
  • Fan Ding,
  • Qin Liu,
  • Changrong Yan,
  • Fusuo Zhang,
  • Davey L. Jones,
  • Xuejun Liu,
  • David R. Chadwick

摘要

The extensive use of plastics in agriculture has resulted in the accumulation of macroplastics (MAPs, >5 mm) and microplastics (MPs, ≤5 mm) in agricultural soils, posing risks to soil functioning and food security. However, the relative contributions of different input pathways to soil MPs remain insufficiently quantified, particularly within intensively plastic-mulched systems. This study quantified and comparatively evaluated multiple MP input pathways within representative long-term plastic film mulch (PFM)-dominated farmlands in China. A large-scale field investigation (266 samples for MP analysis and 29 soil samples for MAP analysis, collected across 27 counties in Yunnan, Gansu, and Shandong Provinces) was integrated with a material flow analysis (MFA) modelling framework to assess source contributions under a defined system boundary. MAP and MP concentrations were highest in Yunnan (120.9 kg ha−1; 7.3 × 105 items kg−1), followed by Gansu (94.0 kg ha−1; 6.1 × 105 items kg−1) and Shandong (61.2 kg ha−1; 4.0 × 105 items kg−1). Model results showed that PFM contributed 19.0 ± 3.1%, 0.7 ± 0.1%, and 4.3 ± 0.9% of soil MPs in Yunnan, Gansu, and Shandong, respectively. Compost, irrigation water, and atmospheric deposition were also identified as relevant pathways. Within the defined study boundary and modelling assumptions, non-PFM pathways, particularly atmospheric deposition, may contribute substantially to soil MP inputs in plastic-mulched systems. These results highlight the importance of integrating multiple pathways for comparative source assessment and for developing more targeted agricultural plastic management strategies.