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Effects of Tensile Stress and Soil Burial on Mechanical and Chemical Degradation Potential of Agricultural Plastic Films

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  • Yanan Han

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
    Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou 730000, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Min Wei

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Xiaoyan Shi

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Dong Wang

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Xulong Zhang

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Yangyang Zhao

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Meng Kong

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Xin Song

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

  • Zhongkui Xie

    (Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou 730000, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Fengmin Li

    (State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China)

Abstract

Plastic film mulching is widely practiced in arid and semiarid farming systems, but the accumulation of plastic residues in soils can negatively affect soil properties. Therefore, efficient means of plastic film degradation are urgently needed to mitigate its unfriendly environmental impacts for sustainable land use. Here, we characterized the effects of tensile stress (TS) and soil burial (SB) on potential degradation properties of three film types: Polyethylene film (PEF), oxo-biodegradable film (OBDF), and biodegradable film (BDF). Weight loss, mechanical properties, hydrophilicity, functional groups, and crystallinity were recorded after TS and SB treatments. The results indicated that: (1) Weight loss of plastic films was associated with SB, although the extent of weight loss depended on film type and was highest in BDF, (2) application of TS before SB weakened the mechanical properties of the films and increased their hydrophilicity, creating favorable conditions for the settlement of microorganisms on the film surface, (3) PEF treated with TS and SB had higher functional group indices and lower crystallinity. Our results highlighted that the combination of TS and SB has the potential to accelerate plastic film degradation.

Suggested Citation

  • Yanan Han & Min Wei & Xiaoyan Shi & Dong Wang & Xulong Zhang & Yangyang Zhao & Meng Kong & Xin Song & Zhongkui Xie & Fengmin Li, 2020. "Effects of Tensile Stress and Soil Burial on Mechanical and Chemical Degradation Potential of Agricultural Plastic Films," Sustainability, MDPI, vol. 12(19), pages 1-13, September.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:19:p:7985-:d:420165
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    References listed on IDEAS

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    1. Yin, Minhua & Li, Yuannong & Fang, Heng & Chen, Pengpeng, 2019. "Biodegradable mulching film with an optimum degradation rate improves soil environment and enhances maize growth," Agricultural Water Management, Elsevier, vol. 216(C), pages 127-137.
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