College of Forestry, Northeast Forestry University, Harbin 150040, China.
College of Forestry, Northeast Forestry University, Harbin 150040, China.
J Hazard Mater. 2024 Mar 5;465:133414. doi: 10.1016/j.jhazmat.2023.133414. Epub 2024 Jan 2.
Microplastics (MPs) widely co-occur with various pollutants in soils. However, the data related to the impacts of MPs on terrestrial animal and microbial properties in pesticide-contaminated soils are few. In this study, the influence of MPs (0.01%, 0.1%, and 1%) on nicosulfuron concentrations in soil (10 µg/g) and earthworms were investigated, moreover, microbial community structure and diversity in soil and earthworm gut were also measured. After 30 days, the concentration of nicosulfuron in soil decreased to 1.27 µg/g, moreover, the residual concentration of nicosulfuron in soil (1%MPs and nicosulfuron) was only 44.8% of that in the single nicosulfuron treatment group. The accumulation of nicosulfuron in earthworms (1%MPs and nicosulfuron) was 7.37 µg/g, which was 1.82 times of that in the single nicosulfuron treatment group. In addition, 1% MPs decreased the richness and diversity of the soil and gut bacterial community in earthworms as well as altered microbial community composition, leading to the enrichment of specific microbial community. Our findings imply that MPs may change the migration of pesticides to terrestrial animal and as well as microbial diversity in earthworms and soil.
微塑料（MPs）广泛存在于土壤中的各种污染物中。然而，关于 MPs 对受农药污染土壤中陆地动物和微生物特性的影响的数据很少。在这项研究中，研究了 MPs（0.01%、0.1%和 1%）对土壤中烟嘧磺隆浓度（10μg/g）和蚯蚓的影响，此外，还测量了土壤和蚯蚓肠道中的微生物群落结构和多样性。30 天后，土壤中烟嘧磺隆的浓度降低到 1.27μg/g，而且，土壤中烟嘧磺隆的残留浓度（1% MPs 和烟嘧磺隆）仅为单一烟嘧磺隆处理组的 44.8%。蚯蚓（1% MPs 和烟嘧磺隆）中烟嘧磺隆的积累量为 7.37μg/g，是单一烟嘧磺隆处理组的 1.82 倍。此外，1% MPs 降低了土壤和蚯蚓肠道中细菌群落的丰富度和多样性，并改变了微生物群落组成，导致特定微生物群落的富集。我们的研究结果表明，MPs 可能会改变农药向陆地动物的迁移以及蚯蚓和土壤中微生物的多样性。
