生物炭添加的微生物机制可减少无土壤基板系统的N2O排放
Xiaofeng Liang1, Wanlai Zhou2, Rui Yang2
1College of Mechanical Engineering, Chengdu University, Chengdu, 610106, PR China.
Journal of environmental management
|October 16, 2023
概括
将2%的生物炭添加到基于泥炭的基板上,可以显著减少温室蔬菜的氧化 (N2O) 排放,同时增加作物产量. 这种最佳的添加增强了的利用和减少N2O到气 (N2).
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 无土壤的泥炭基底被用于温室蔬菜生产,但有助于显著的氧化 (N2O) 排放.
- 热解生物炭是减少N2O排放的潜在解决方案,但其在无土壤基板中的作用和机制尚不清楚.
研究的目的:
- 研究不同生物炭添加比率 (0-10%) 对来自泥炭基底的N2O排放的影响.
- 为了确定减轻N2O排放和提高生菜产量的最佳生物炭度.
- 阐明生物炭对N2O生产和减少途径的影响的机制.
主要方法:
- 建立了六种不同的生物炭与泥炭比率 (0%,2%,4%,6%,8%,10%v/v) 的治疗方法.
- 测量了N2O排放量,并评估了生菜产量.
- 稳定同位素技术,qPCR和高通量测序被用于识别微生物N2O生产途径 (细菌化,古代化,真菌脱,脱细菌脱,脱细菌脱).
主要成果:
- 生物炭的添加显著降低了处理过程中的N2O排放量,减排幅度从51%到81%不等.
- 菜产量增加了2%和4%的生物炭,但随着度更高 (6-10%) 降低了.
- 脱剂细菌的脱是主要的N2O生产途径;生物炭改变了真菌和细菌脱的贡献,并增加了N2O减少到N2.
结论:
- 将2%的生物炭添加到基于泥炭的基板是最优的,可以将83%的N2O减少到N2,最大限度地减少N2O排放,并最大限度地提高菜产量和使用效率.
- 生物炭的添加有效地减轻了来自无土壤种植系统的温室气体排放.
- 了解微生物通路对于开发有效的基于生物炭的减缓策略至关重要.
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