细菌群体和酶活动对传统和可生物降解的微塑料在米土壤中的不一致的反应
Zhiyu Zhang1, Wenfeng Wang2, Jiping Liu3
1State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Street, Changchun 130012, China; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Street, Changchun 130012, China; Jilin Normal University, 1301 Haifeng Street, Siping 136000, China.
The Science of the total environment
|November 17, 2023
概括
可生物降解和传统的微塑料改变了土壤化学和微生物群落. 这两种类型都会影响土壤特性,因此在风险评估中需要考虑聚合物类型和度.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 土壤中微塑料污染是一个越来越令人担忧的问题.
- 在农业中使用的可生物降解塑料也可能导致微塑料污染.
- 可生物降解微塑料与传统微塑料对土壤生态系统的不同影响尚不清楚.
研究的目的:
- 研究传统 (聚烯,PP) 和可生物降解 (聚乳酸,PLA) 微塑料在米土壤上的不同影响.
- 评估对地化学性质,酶活动和微生物社区结构的影响.
主要方法:
- 进行了41天的微观宇宙实验.
- 评估了土壤pH值,碳和含量的变化.
- 评估了酶活性 (尿酶,糖酶,性酸酶,光二酸盐酸酶).
- 使用FAPRPTAX.分析了土壤细菌社区结构和功能基因.
主要成果:
- 无论是PLA还是PP的微塑料都增加了土壤的pH值,改变了碳和含量.
- 微塑料暴露通常会增加光二甲酸盐酸酶活性,对其他酶有不同的影响.
- 微塑料改变了细菌群体结构,改变了参与纤维素分解和尿解的功能基因.
- 结构方程建模表明,土壤营养和pH值的变化影响了细菌群落,这反过来影响了酶活动.
结论:
- 微塑料的类型和度显著影响土壤的地质化学和微生物特性.
- 土壤微生物对微塑料的反应各不相同,这凸显了对聚合物特定风险评估的需要.
- 了解微塑料的影响对于可持续的农业实践和土壤健康管理至关重要.
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