| 有机肥对聚苯乙烯纳塑料在棉花植株体内富集的影响 |
| 摘要点击 408 全文点击 11 投稿时间：2025-01-27 修订日期：2025-04-07 |
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| 中文关键词 荧光标记 聚苯乙烯 纳塑料（NPs） 有机肥 富集 |
| 英文关键词 fluorescent labeling polystyrene nanoplastics （NPs） organic fertilizer accumulation |
| DOI 10.13227/j.hjkx.20260246 |
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| 中文摘要 |
| 为探究有机肥添加是否会减少聚苯乙烯纳塑料（PS-NPs）在棉株根部及茎秆的吸收与积累，以粒径为200 nm荧光标记PS-NPs作为棉株体内的示踪物质，设置不同有机肥添加量（0 g·kg-1和10 g·kg-1）和相同聚苯乙烯纳塑料添加量（100 mg·kg-1）开展盆栽模拟试验. 结果表明，棉花根系会吸收PS-NPs，并转移至茎秆中，定量结果显示，添加纳塑料+有机肥（MOF1）处理大部分颗粒保留在根部，转移至茎秆中的PS-NPs荧光强度占根部荧光强度的60.08%. 仅添加纳塑料（MOF0）处理棉株SPAD值、茎干物质量和叶干物质量相较于空白对照（CK）处理均显著降低，分别降低了6.94%、37.29%和22.36%，而MOF1处理叶面积显著增加10.12%；MOF1处理：株高、茎粗、叶面积、SPAD值、根干物质量和叶干物质量相较于MOF0处理均显著增加，分别增加了9.28%、13.99%、10.12%、7.82%、21.05%和21.47%；此外，相较于CK处理，MOF0处理棉株根部超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）活性均显著增加，分别增加了30.91%、11.61%和40.00%，丙二醛（MDA）质量摩尔浓度降低12.24%，而MOF1处理根部超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性均显著增加，分别增加了44.51%和100%，丙二醛（MDA）质量摩尔浓度显著降低26.43%. 综上，有机肥可以减少PS-NPs在棉株茎秆中的富集，茎秆中的富集量显著降低43.78%. 有机肥可显著抑制PS-NPs被棉株根部吸收后转移至茎秆，以此降低棉株体内PS-NPs的富集量. |
| 英文摘要 |
| In order to investigate whether the addition of organic fertilizers could reduce the uptake and accumulation of polystyrene nanoplastics （PS-NPs） in the roots and stalks of cotton plants， a pot experiment was conducted using different amounts of organic fertilizers （0 g·kg-1 and 10 g·kg-1） combined with a fixed amount of PS-NPs （100 mg·kg-1）. Fluorescently labeled PS-NPs with a particle size of 200 nm were used as tracers. The results demonstrated that cotton roots absorbed PS-NPs and transferred them to the stalks. Quantitative analysis revealed that most of the particles were retained in the roots under the treatment of nanoplastics + organic fertilizer （MOF1）， with the fluorescence intensity of PS-NPs transferred to the stalks accounting for only 60.08% of that in the roots. Compared to those in the blank control （CK）， the SPAD value， stem dry matter mass， and leaf dry matter mass of cotton plants in the nanoplastic-only （MOF0） treatment were significantly reduced by 6.94%， 37.29%， and 22.36%， respectively. In contrast， the leaf area in the MOF1 treatment increased significantly by 10.12%. Additionally， plant height， stem thickness， leaf area， SPAD value， root dry matter mass， and leaf dry matter mass in the MOF1 treatment were all significantly higher than those in the MOF0 treatment， increasing by 9.28%， 13.99%， 10.12%， 7.82%， 21.05%， and 21.47%， respectively. Furthermore， compared to those in the CK treatment， the activities of superoxide dismutase （SOD）， peroxidase （POD）， and catalase （CAT） in the roots of MOF0-treated plants were significantly elevated by 30.91%， 11.61%， and 40.00%， respectively， while malondialdehyde （MDA） mass molar concentration decreased by 12.24%. For MOF1-treated plants， the activities of SOD and CAT in the roots were significantly increased by 44.51% and 100%， respectively， and MDA mass molar concentration was reduced by 26.43%. In conclusion， organic fertilizer effectively reduced the accumulation of PS-NPs in cotton plant stalks by 43.78%. It also significantly mitigated the transfer of PS-NPs from roots to stalks， thereby reducing the overall accumulation of PS-NPs in cotton plants. |
