您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Macro- and microplastic accumulation in soil after 32 years of plastic film mulching

文献类型： 外文期刊

作者： Li, Shitong 1 ; Ding, Fan 1 ; Flury, Markus 2 ; Wang, Zhan 1 ; Xu, Li 4 ; Li, Shuangyi 1 ; Jones, Davey L. 5 ; Wang, Jingkuan 1 ;

作者机构： 1.Shenyang Agr Univ, Coll Land & Environm, 120 Dongling Rd, Shenyang 110866, Peoples R China

2.Washington State Univ, Dept Crop & Soil Sci, Pullman, WA 99164 USA

3.Washington State Univ, Dept Crop & Soil Sci, Puyallup, WA 98371 USA

4.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Agr Stand & Testing, Beijing 100095, Peoples R China

5.Bangor Univ, Environm Ctr Wales, Bangor LL57 2UW, Gwynedd, Wales

6.Murdoch Univ, Ctr Sustainable Farming Syst, Food Futures Inst, Soils West, Murdoch, WA 6105, Australia

关键词： Plastic debris; Microplastic; Plastic mulch; Nitrogen fertilization; Polyethylene; Soil profile

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：9.988； 五年影响因子：10.366 ）

ISSN： 0269-7491

年卷期： 2022 年 300 卷

页码：

收录情况： SCI

摘要： Plastic film mulch (PFM) is a double-edged-sword agricultural technology, which greatly improves global agricultural production but can also cause severe plastic pollution of the environment. Here, we characterized and quantified the amount of macro- and micro-plastics accumulated after 32 years of continuous plastic mulch film use in an agricultural field. An interactive field trial was established in 1987, where the effect of plastic mulching and N fertilization on maize yield was investigated. We assessed the abundance and type of macroplastics (>5 mm) at 0-20 cm soil depth and microplastic (<5 mm) at 0-100 cm depth. In the PFM plot, we found about 10 times more macroplastic particles in the fertilized plots than in the non-fertilized plots (6796 vs 653 pieces/m(2)), and the amount of film microplastics was about twice as abundant in the fertilized plots than in the non-fertilized plots (3.7 x 10(6) vs 2.2 x 10(6) particles/kg soil). These differences can be explained by entanglement of plastics with plant roots and stems, which made it more difficult to remove plastic film after harvest. Macroplastics consisted mainly of films, while microplastics consisted of films, fibers, and granules, with the films being identified as polyethylene originating from the plastic mulch films. Plastic mulch films contributed 33%-56% to the total microplastics in 0-100 cm depth. The total number of microplastics in the topsoil (0-10 cm) ranged as 7183-10,586 particles/kg, with an average of 8885 particles/kg. In the deep subsoil (80-100 cm) the plastic concentration ranged as 2268-3529 particles/kg, with an average of 2899 particles/kg. Long-term use of plastic mulch films caused considerable pollution of not only surface, but also subsurface soil. Migration of plastic to deeper soil layers makes removal and remediation more difficult, implying that the plastic pollution legacy will remain in soil for centuries.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台