| 3种不同微塑料对黄瓜生长及氮素利用的影响 |
| 摘要点击 1097 全文点击 86 投稿时间：2024-05-04 修订日期：2024-08-07 |
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| 中文关键词 微塑料（MPs） 氮素吸收 生物量 黄瓜 幼苗 |
| 英文关键词 microplastics （MPs） nitrogen uptake biomass cucumber seedlings |
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| 中文摘要 |
| 研究表明微塑料对环境造成了严重污染. 然而，微塑料对农田生态过程的影响尚不明确. 黄瓜（Cucumis sativus L.）作为一种重要的农作物，在农业经济发展中有着重要的影响. 以黄瓜为研究对象在温室进行盆栽试验，选择3种微塑料分别为聚乙烯（PE）、聚氯乙烯（PVC）和聚对苯二甲酸乙二醇酯（PET），旨在探究3种微塑料对黄瓜生长以及氮素吸收利用的影响. 结果表明，整体上看微塑料使黄瓜总生物量平均增加了9.5%. PE处理显著增加了黄瓜第28 d叶和根的生物量；同时，PVC处理显著增加了黄瓜第70 d叶和茎的生物量，及黄瓜总生物量；而PET处理显著增加了黄瓜第28 d 和第70 d叶的生物量. 微塑料添加促进了黄瓜植株对氮的吸收，使氮素吸收平均增加了10.8%. PET处理在黄瓜的第28 d和第70 d显著增加了氮的吸收量. 此外，3种微塑料处理均显著增加了黄瓜根系在第28 d对15N的利用率，PET处理显著提高了黄瓜叶片在第56 d和第70 d对15N的利用率. 总之，微塑料对黄瓜的生长和氮吸收利用有一定促进作用，但不同种类微塑料有所差别，研究结果有助于为评估微塑料对作物生长及氮吸收利用的影响提供理论支撑. |
| 英文摘要 |
| Microplastics （MPs） are increasingly recognized for their detrimental effects on the environment. However， their influence on agricultural ecosystems， particularly on crops like cucumber （Cucumis sativus 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 15N utilization in cucumber roots by day 28， while PET notably enhanced leaf 15N 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. |
