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微塑料对农业生态系统中的土壤温室气体排放的影响:它是否取决于微塑料的形状和土壤类型?

Tianshu Feng¹, Zhanbo Wei², Evgenios Agathokleous³

¹Changwang School of Honors, Nanjing University of Information Science & Technology, Nanjing 210044, China.

The Science of the total environment

|December 13, 2023

概括

微塑料纤维在Ferralsols中显著增加了土壤温室气体排放,但在Chernozems或Luvisols中没有. 土壤类型和微塑料的形状是影响这些排放的关键因素.

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:

微塑料是影响农业生态系统的普遍土壤污染物.
微塑料形状和土壤类型对温室气体排放的影响尚不清楚.

研究的目的:

研究不同微塑料形状 (纤维,薄膜,球) 如何影响三种土壤类型 (Chernozems,Luvisols,Ferralsols) 的CO2和N2O排放.
探索微塑料诱导的土壤细菌群落变化和温室气体流动之间的关系.

主要方法:

进行了一项为期56天的土壤化实验.
在Chernozems,Luvisols和Ferralsols中引入了微塑料形状.
测量了CO2和N2O排放,土壤细菌群体组成和酶活性.

主要成果:

微塑料纤维显著增加了Ferralsols中的CO2 (21.7%) 和N2O (31.4%) 排放.
这些Ferralsols的增加与细菌类 (Actinobacteria, Bacilli) 和酶活性的转变相关.
在使用微塑料纤维的Chernozems和Luvisols中没有观察到温室气体排放的显著变化.

结论:

对微塑料的温室气体排放反应取决于微塑料的形状和土壤类型.
与Chernozems和Luvisols相比,Ferralsols对微塑料引起的温室气体排放变化更容易受到影响.
土壤的缓冲能力可以减轻微塑料对某些土壤类型温室气体排放的影响.

关键词:

细菌群体的组成细菌群体的组成二氧化碳的二氧化碳 (CO2) 生产生产.微生物酶是一种微生物酶.微塑料纤维是一种微塑料纤维.排放量为N(2) O的排放量

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