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Effects of PLA/PBAT-based biodegradable film mulch on water and nitrogen dynamics in soil-potato system

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  • Yang, Chong
  • Feng, Shouli
  • Yu, Jingyin
  • Tao, Xiaoyuan
  • Gao, Xuhua
  • Xu, Shengchun

Abstract

Replacement of polyethylene (PE) film mulch (PM) to biodegradable film mulch (BM) can significantly reduce plastic pollution and carbon footprint in agricultural production. However, the effects of BM on nitrogen dynamics in soil-plant system remain elusive. A field experiment with two cropping seasons was conducted to investigate the effects of biodegradable film on soil nitrogen mineralization, nitrate accumulation and leaching, and plant nitrogen uptake. Although the distribution of soil water and nitrate under treatment BM was similar to that under treatment PM at early growth stage of potato plants, the decomposition of biodegradable film during later growth stage of potato plants caused a reduction in soil water content and nitrogen mineralization, leading to a decrease in soil nitrate accumulation under treatment BM. In addition, the degradation of biodegradable film enhanced the translocation of nitrate from upper to deeper soil layers. However, there was no difference in tuber yield or plant nitrogen uptake between treatments BM and PM, suggesting the decomposition of biodegradable film at later growth stage has limited effect on potato nitrogen uptake and tuber yield. Therefore, the PLA/PBAT-based biodegradable mulch film is a promising substitution to PE film for winter potato production.

Suggested Citation

  • Yang, Chong & Feng, Shouli & Yu, Jingyin & Tao, Xiaoyuan & Gao, Xuhua & Xu, Shengchun, 2024. "Effects of PLA/PBAT-based biodegradable film mulch on water and nitrogen dynamics in soil-potato system," Agricultural Water Management, Elsevier, vol. 297(C).
    • Handle: RePEc:eee:agiwat:v:297:y:2024:i:c:s0378377424001641
    DOI: 10.1016/j.agwat.2024.108829
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    References listed on IDEAS

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    1. Lu, Junsheng & Hu, Tiantian & Zhang, Baocheng & Wang, Li & Yang, Shuohuan & Fan, Junliang & Yan, Shicheng & Zhang, Fucang, 2021. "Nitrogen fertilizer management effects on soil nitrate leaching, grain yield and economic benefit of summer maize in Northwest China," Agricultural Water Management, Elsevier, vol. 247(C).
    2. Gao, Xuhua & Xie, Dong & Yang, Chong, 2021. "Effects of a PLA/PBAT biodegradable film mulch as a replacement of polyethylene film and their residues on crop and soil environment," Agricultural Water Management, Elsevier, vol. 255(C).
    3. Jiang, Rui & Li, Xiao & Zhu, Wei & Wang, Kun & Guo, Sheng & Misselbrook, Tom & Hatano, Ryusuke, 2018. "Effects of the ridge mulched system on soil water and inorganic nitrogen distribution in the Loess Plateau of China," Agricultural Water Management, Elsevier, vol. 203(C), pages 277-288.
    4. Gu, Xiaobo & Cai, Huanjie & Fang, Heng & Chen, Pengpeng & Li, Yupeng & Li, Yuannong, 2021. "Soil hydro-thermal characteristics, maize yield and water use efficiency as affected by different biodegradable film mulching patterns in a rain-fed semi-arid area of China," Agricultural Water Management, Elsevier, vol. 245(C).
    5. Ma, Dedi & Chen, Lei & Qu, Hongchao & Wang, Yilin & Misselbrook, Tom & Jiang, Rui, 2018. "Impacts of plastic film mulching on crop yields, soil water, nitrate, and organic carbon in Northwestern China: A meta-analysis," Agricultural Water Management, Elsevier, vol. 202(C), pages 166-173.
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