在亚热带森林土壤中,由诱导的甲吸收抑制被生物炭减轻
Jiashu Zhou1, Shuokang Liu1, Caixian Tang2
1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China.
Environmental research
|July 5, 2025
概括
生物炭的应用增强了森林土壤的甲 (CH4) 吸收,抵消了 (N) 沉积的抑制. 这项研究揭示了生物炭.
科学领域:
- 土壤科学 土壤科学
- 环境科学 环境科学
- 生物地质化学生物地质化学
背景情况:
- 森林土壤是重要的大气甲 (CH4) 沉.
- 来自人类活动和沉积的 (N) 输入抑制了土壤的CH4吸收.
- 生物炭是一种减轻N诱导CH4吸收抑制的潜在策略.
研究的目的:
- 研究添加和修改生物炭对森林土壤CH4吸收的影响.
- 确定生物炭的剂量依赖性影响及其与N水平的相互作用.
- 阐明生物炭对CH4循环的影响的潜在机制和动力学.
主要方法:
- 在森林土壤中进行了控制的N添加 (0,0.2,0.6g N kg-1) 和生物炭修改 (0,5,15g C kg-1) 的实验研究.
- 测量CH4吸收率,土壤物理化学特性 (C,N形式,含水量) 和微生物基因丰度 (mcrA,pmoA).
- 在CH4循环过程中对N和生物炭处理之间的相互作用的分析.
主要成果:
- 添加N显著降低了CH4的吸收,而生物炭修正剂量取决于增加了它.
- 较高的生物炭应用率放大了CH4的吸收,特别是在高度下,观察到最多增加了110%.
- 生物炭调节了土壤的C和N池,抑制了CH4的产生,刺激了CH4的氧化,改变了微生物基因丰度 (mcrA,pmoA).
结论:
- 生物炭的应用可以有效地增强森林土壤的CH4封存,减轻由增加的N输入引起的抑制.
- 生物炭的有效性取决于剂量,并且通过更高的N水平来放大.
- 生物炭的好处是通过改变土壤生物地质化学和参与CH4循环的微生物群落来调解的.
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