长期生物炭的应用增强了碳的稳定性,并减轻了被洪水淹没的水系统中的甲排放
Hao Chen1, Jiahui Xu1,2, Jiahui Yuan1
1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, China.
Environmental science & technology
|February 13, 2026
概括
在被洪水淹没的水系统中长期应用生物炭可以改善营养素的保留,并显著减少甲 (CH4) 排放. 这项气候智能修正案增强了土壤有机碳 (SOC) 和 (P) 的稳定性,为种植提供了可持续的解决方案.
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:
- 生物炭被推广为农业中的气候效益,但其对被洪水淹没的水系统中营养动态和温室气体排放的长期影响尚不清楚.
- 被洪水淹没的水系统是甲 (CH4) 和营养损失的重要来源,影响生产力和气候.
研究的目的:
- 研究生物炭对土壤有机碳 (SOC), (P) 和甲 (CH4) 动态的长期影响.
- 了解矿物和微生物过程在持续生物炭应用下调节这些动态中的作用.
主要方法:
- 一个13年的实地试验,不同的草生物炭应用率 (0-22.5 t ha-1 season-1).
- 一个60天的无氧化试验的第13年土壤.
- 使用纳米级成像和分析分析矿物成分,SOC,P动态,CH4排放和微生物群落.
主要成果:
- 长期的生物炭应用导致氧化铁的耗尽和Ca相的丰富,形成稳定的Ca桥接OC-矿物-P复合体.
- 高的生物碳率显著减缓了无氧下Fe (III) 和硫酸盐的减少,减少了CH4排放的53-80%和P释放的60-71%.
- 在有机矿物复合体和微生物群落的转移抑制了甲基生成和增强了营养保留.
结论:
- 超过13年的生物炭应用可持续地提高了被洪水淹没的水系统中的土壤有机碳和的保留.
- 生物炭通过改变土壤的氧化还原过程和微生物活动来减轻甲 (CH4) 排放.
- 生物炭提出了一个可扩展的,以自然为基础的战略,用于全球大米生产中的综合营养管理和气候变化减缓.
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