连续使用生物炭导致的温室气体排放量高于在高地农业生态系统中单次使用生物炭的排放量
Yan Zhang1, Lihong Song2, Kaiyu Li1
1College of Agriculture, Guizhou University, Guiyang 550025, China.
Journal of environmental sciences (China)
|December 29, 2025
概括
一次生物炭应用有效地减少了土壤温室气体 (GHG) 排放,而不是在三年内连续应用. 持续应用增加了全球变暖潜力 (GWP) 值.
科学领域:
- 土壤科学 土壤科学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 对土壤的生物炭应用增强了碳捕获,并减轻了温室气体 (GHG) 排放.
- 生物炭应用频率对土壤温室气体排放的影响尚不清楚,需要进一步调查.
研究的目的:
- 调查土壤温室气体排放的特征及其影响因素在单次和连续的生物炭应用三年.
- 评估生物炭应用频率对土壤物理,化学和生物特性的影响.
主要方法:
- 在高地黄色土壤上进行的实地实验.
- 监测温室气体排放 (CO2,CH4,N2O) 和土壤特性 (有机碳,pH,EC,含水量,散装密度,微生物生物质碳和).
- 结构方程建模用于分析影响温室气体排放的因素.
主要成果:
- 生物炭的应用增加了土壤有机碳,pH,EC和水含量,同时降低了散装密度.
- 与单次应用相比,连续应用导致了较高的土壤pH,EC和微生物生物质碳 (MBC).
- 较高的生物炭率增加了CH4吸收,但增加了CO2排放;持续应用抑制了N2O,增加了CH4吸收,但促进了CO2排放.
- 与一次性应用相比,连续三年应用将土壤GWP值提高了27.8%.
结论:
- 生物炭应用调节土壤特性,以减少高地农业生态系统的温室气体排放.
- 一次生物炭应用在减少总体温室气体排放方面比连续三年应用更有效.
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