有机肥料通过改变循环微生物协会,减少氧化排放,有利于在土壤总量级上完全脱
Quan Tang1, Sara Moeskjær2, Anne Cotton3
1Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225009, China.
The Science of the total environment
|June 25, 2024
概括
有机肥料通过促进其在土壤聚合物中转化为气 (N2) 来减少氧化 (N2O) 的排放. 这通过影响土壤微生物群落来发生,有利于N2O消费而不是生产.
科学领域:
- 土壤科学 土壤科学
- 环境微生物学 环境微生物学
- 农业科学 农业科学
背景情况:
- 农业管理影响土壤结构和微生物过程,影响氧化 (N2O) 排放.
- 缺乏对有机肥如何影响微量N2O排放和循环微生物群落的机制性理解.
研究的目的:
- 调查有机肥料对不同土壤聚合物大小内的N2O生产和减少的影响.
- 描述在有机化肥下参与循环的相关微生物群落.
主要方法:
- 使用自动气体染色学来评估脱气体 (N2O,N2) 和土壤聚合物的潜在脱能力 (>2毫米,2-0.25毫米,<0.25毫米).
- 微生物群落使用测序和qPCR针对N2O生产 (nirK, nirS) 和减少 (nosZ类 I 和 II) 基因进行了分析.
主要成果:
- 有机肥料通过增强N2O到N2的转换减少了N2O的排放.
- 在较小的土壤聚合物中观察到N2O生产和减少热点,受肥料类型和速率的影响.
- 与N2O产生基因相比,N2O减少基因 (nosZ) 的丰富性和多样性更高,表明向完全脱转变.
结论:
- 有机化肥通过改变土壤因素和促进微生物群落在聚合物中的利基分割来减轻N2O排放,有利于N2O消费.
- 特定的微生物社区结构与排放水平相关,为预测农业N2O排放提供了潜力.
- 通过优化有机化肥实践,研究结果支持可持续农业和净零碳战略.
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