Li Guang-Xiang, Wu Xing-Li, Lin Xue-Ping, Li Hong-Jie, Zhu Yu-Lin, Xie Kai-Liu, Fang Xiong
College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.
College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Huan Jing Ke Xue. 2025 Jun 8;46(6):3950-3956. doi: 10.13227/j.hjkx.202405009.
Microplastics （MPs） are increasingly recognized for their detrimental effects on the environment. However， their influence on agricultural ecosystems， particularly on crops like cucumber （ L.）， remains unclear. In this study， we conducted a greenhouse pot trial to examine how three types of microplastics - polyethylene （PE）， polyvinyl chloride （PVC）， and polyethylene terephthalate （PET）-affect the growth and nitrogen uptake of cucumber seedlings. The results showed that， on the whole， microplastic addition increased cucumber seedling biomass by ca. 9.5%. Specifically， the PE treatment significantly boosted leaf and root biomass by day 28， while PVC treatment notably enhanced leaf and stem biomass and total biomass by day 70. The PET treatment significantly increased leaf biomass at days 28 and 70. Furthermore， microplastic addition increased nitrogen uptake by 10.8%， and the PET treatment significantly enhanced nitrogen uptake at days 28 and 70. Additionally， all microplastic treatments significantly improved N utilization in cucumber roots by day 28， while PET notably enhanced leaf N utilization by days 56 and 70. In conclusion， microplastic addition promoted cucumber growth and nitrogen uptake， with variations depending on microplastic type. These results contribute to understanding microplastic effects on crop growth and nitrogen uptake， offering insights for evaluating their impact on agricultural ecosystems.
微塑料（MPs）因其对环境的有害影响而日益受到关注。然而，它们对农业生态系统的影响，尤其是对黄瓜（L.）等作物的影响仍不清楚。在本研究中，我们进行了一项温室盆栽试验，以研究三种类型的微塑料——聚乙烯（PE）、聚氯乙烯（PVC）和聚对苯二甲酸乙二酯（PET）——如何影响黄瓜幼苗的生长和氮吸收。结果表明，总体而言，添加微塑料使黄瓜幼苗生物量增加了约9.5%。具体而言，PE处理在第28天显著提高了叶片和根系生物量，而PVC处理在第70天显著提高了叶片和茎生物量以及总生物量。PET处理在第28天和第70天显著增加了叶片生物量。此外，添加微塑料使氮吸收增加了10.8%，PET处理在第28天和第70天显著提高了氮吸收。此外，所有微塑料处理在第28天显著提高了黄瓜根系的氮利用率，而PET在第56天和第70天显著提高了叶片的氮利用率。总之，添加微塑料促进了黄瓜的生长和氮吸收，且因微塑料类型而异。这些结果有助于理解微塑料对作物生长和氮吸收的影响，为评估其对农业生态系统的影响提供了见解。
