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微塑料通过将酸盐减少从DNRA转移到脱和Anammox,从而增加黑色土中的气损失

Xiaofang Ma¹, Jun Shan², Yanchao Chai²

¹State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.

The Science of the total environment

|October 17, 2023

概括

在田土壤中的微塑料 (MP) 显著改变了循环. 它们促进了脱和Anammox,同时抑制了非仿真性酸盐降解为 (DNRA),可能增加农田的气损失.

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 (MP) 是普遍存在的土壤污染物,影响农业生态系统.
在土中,MPs对循环过程的影响在很大程度上是未知的.

研究的目的:

调查常见MPs (聚乙烯,PVC,PE) 对大米土壤中关键变化的影响.
评估MPs对脱,Anammox和DNRA率以及微生物群落的影响.

主要方法:

使用15N-标记技术量化的工艺速度.
采用微生物分子方法来分析相关的微生物社区变化.
研究了MPs (200-400μm) 对黑色土的影响.

主要成果:

所有测试的MP (PS,PVC,PE) 都显著增加了Anammox率 (6.6%-745%) 和降低了DNRA率 (15.1%-74.2%).
聚烯和聚乙烯MP显著提高了脱率 (分别为79.3%-102.3%和34.8%-62.1%).
议员们将酸盐分离转向脱和Anammox,将DNRA的相对贡献从24.1%降至5.4%-14.2%.

结论:

通过促进脱和Anammox,同时抑制DNRA,MPs改变了土中的循环.
这些转变是由微生物基因丰度和社区结构的变化所驱动的,表明农业环境中气损失可能会增加.
进一步的研究对于了解农业生态系统中的MP环境行为至关重要.

关键词:

亚纳姆莫克斯 (Anammox) 是一个这是DNRA.脱化过程中的脱.微塑料是一种微塑料.由于的损失导致了的损失.

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