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低密度聚乙烯微塑料和生物炭相互作用影响温室气体排放和微生物群落结构和功能在米土壤

Zhiyu Zhang¹, Yujuan Kang², Wenfeng Wang²

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.

|August 23, 2023

概括

在米土壤中的微塑料 (MP) 和生物炭 (BC) 改变了温室气体排放. 它们的联合应用增加了甲,但减少了二氧化碳,对氧化有复杂的影响,影响土壤微生物和基因.

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:

田土壤面临微塑料 (MP) 污染的挑战.
生物炭 (BC) 是在田中常见的土壤修改剂.
在土壤生物地质化学上,MPs和BC之间的相互作用还未得到充分研究.

研究的目的:

研究低密度聚乙烯 (LDPE) 微塑料和生物炭 (BC) 对米土壤温室气体排放的相互作用影响.
探索这些修正案对土壤特性,微生物群落和功能基因的影响.

主要方法:

一个41天的微观宇宙实验是使用米土进行的.
处理包括不同度的LDPE (0.5-1.5 wt%) 和固定度的BC (5 wt%),单独和联合应用.
分析了温室气体排放 (CH4,CO2,N2O),土壤pH值,微生物群落结构 (16SrRNA测序) 和功能基因丰度 (mcrA,norB,narG).

主要成果:

无论BC和LDPE单独或联合都增加了甲 (CH4) 排放,同时抑制了二氧化碳 (CO2) 排放.
LDPE减少了氧化 (N2O) 排放,而BC增加了它们.
土壤的pH值和mcrA基因的丰度增加了BC和/或LDPE,与更高的CH4排放有关.
N2O排放与norB和narG基因丰度有积极联系,这表明脱.

结论:

联合应用BC和LDPE MPs显著改变了米土壤的温室气体排放.
这些变化是由土壤化学性质的变化,微生物社区结构和关键功能基因的丰富性驱动的.
了解这些相互作用对于管理土生态系统和减轻气候变化影响至关重要.

关键词:

生物炭是一种生物炭.功能性基因是指功能性的基因.温室气体温室气体是一种温室气体.微生物社区的微生物社区.微塑料是一种微塑料.

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