通过添加生物炭和碳酸添加堆肥时减轻氧化排放的机制
Xinyi Yang1, Pengpeng Duan1, Yubo Cao2
1Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, China; Institutional Center for Shared Technologies and Facilities of Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
将生物炭或碳酸 (CaCO3) 添加到堆肥中可以显著减少氧化 (N2O) 排放. 这些修正案改变了微生物群落和基因表达,减轻了N2O的产生,并加强了其减少为气的过程.
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:
- 堆肥是有机废物管理的重要过程.
- 氧化 (N2O) 是一个强大的温室气体,在堆肥过程中排放出来.
- 生物炭和碳酸 (CaCO3) 是减轻N2O排放的潜在修正案.
研究的目的:
- 研究生物炭和CaCO3在堆肥过程中影响N2O排放的机制.
- 分析对矿物,溶解有机碳和,N2O来源和功能基因的影响.
主要方法:
- 系统地研究使用生物炭和CaCO3添加的堆肥过程.
- 量化N2O排放,矿物和溶解的有机碳和.
- 与化,脱化和N2O减少相关的功能基因丰度的分析.
主要成果:
- 生物炭的添加使N2O排放量减少了26.5-47.8%,而CaCO3则减少了13.9-37.4%.
- 缓解与氨氧化细菌 (AOB) 和真菌对N2O生产的贡献减少有关.
- 增加 nosZ 基因的丰度表明 N2O 减少到 N2.2 的增强.
结论:
- 生物炭和CaCO3是减轻堆肥N2O排放的有效修正案.
- 这些修改影响了N2O生产和消费的微生物途径.
- 了解这些机制可以优化堆肥实践,以减少温室气体排放.
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