| 孙贝雯,公玮,李月芬,刘兆顺,刘毅.塑料污染对农田土壤团聚体稳定性的影响[J].农业环境科学学报,2023,42(5):1051-1060. |
| 塑料污染对农田土壤团聚体稳定性的影响 |
| Impacts of plastic pollution on the stability of farmland soil aggregates |
| 投稿时间：2022-09-07 |
| DOI：10.11654/jaes.2022-0898 |
| 中文关键词: 塑料污染 土壤团聚体 团聚体稳定性 团聚体直径 |
| 英文关键词: plastic pollution soil aggregates soil aggregate stability soil aggregate diameter |
| 基金项目:国家自然科学基金项目（31971532，32171648） |
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| 摘要点击次数: 876 |
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| 中文摘要: |
| 为探究塑料污染对农田土壤团聚体的影响，本研究在全国范围内，针对被塑料污染的土壤和未被塑料污染的土壤进行配对采样，经干筛法和湿筛法测定团聚体组成，利用土壤团聚体稳定性指标[团聚体破坏率（Percentage of aggregate destruction，PAD）、平均重量直径（Mean weight diameter，MWD）、几何平均直径（Geometric mean diameter，GMD）和标准化平均重量直径（Normalized mean weight diameter，NMWD）]体系的差异，研究了塑料污染对农田土壤团聚体稳定性的影响。结果表明：从团聚体组成来看，农田土壤塑料输入增加了>5 mm机械稳定性大团聚体比例，降低了<0.25 mm机械稳定性团聚体比例；塑料输入降低了>2 mm水稳性大团聚体比例，增加了<0.053 mm土壤颗粒的比例。农田土壤塑料污染显著增加了机械稳定性团聚体的MWD和GMD，但对水稳性团聚体直径无影响。农田土壤塑料污染显著增加了团聚体的PAD，降低了土壤结构的稳定性。研究表明，农田土壤塑料污染会明显增加土壤大团聚体的机械稳定性，略降低团聚体的水稳定性。 |
| 英文摘要: |
| To explore the effects of plastic pollution on soil aggregates in farmlands, this study was based on large-scale sampling of plastic-contaminated soil and non-plastic-contaminated soil in pairs across China. The aggregate composition of the non-plasticcontaminated soil was measured using both dry and wet sieving methods. The effects of plastic pollution on the stability of farmland soil aggregates were investigated based on the differences in the soil aggregates stability index systems[percentage of aggregate destruction (PAD), mean weight diameter(MWD), geometric mean diameter(GMD) and normalized mean weight diameter(NMWD)]. The results showed that, in terms of aggregate composition, the proportion of >5 mm large mechanically stable aggregates in farmland soil increased, the proportion of <0.25 mm mechanically stable aggregates was reduced, and the proportion of >2 mm large water-stable aggregates was reduced by plastic input, which increased the proportion of <0.053 mm soil particles. Soil plastic pollution significantly increased the MWD and GMD of mechanically stable aggregates, but did not affect the diameter of water-stable aggregates. Soil plastic pollution in farmland significantly increased the PAD of aggregates and reduced the stability of soil structures. The results indicate that the plastic pollution of farmland soil significantly increased the mechanical stability and slightly decreased the water stability of soil macro aggregates. |
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