生物炭在温室气体排放中的双重作用:依赖化肥和减缓潜力
Hongzhao Li1, Liwen Lin2, Yutao Peng2
1Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Faculty of Food Science and Engineering, Foshan University, Foshan 258000, China.
The Science of the total environment
|January 29, 2024
概括
在蔬菜生产中应用生物炭可以减少温室气体 (GHG) 排放,但只有在低条件下. 高含量与生物炭增加温室气体排放,强调管理对有效缓解的重要性.
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:
- 生物炭被广泛用于减轻蔬菜生产中的温室气体 (GHG) 排放.
- 然而,它的有效性并不能保证,并且取决于各种因素.
- 了解生物炭特性,土壤特征和温室气体排放之间的相互作用对于有效的减排策略至关重要.
研究的目的:
- 阐明生物炭应用,土壤特性和蔬菜生产中的温室气体排放之间的复杂关系.
- 为优化可持续农业中的生物炭使用提供见解.
- 确定影响生物炭在温室气体排放控制中的有效性的关键因素.
主要方法:
- 对43篇出版物进行了元分析.
- 使用刺激回归分析来确定关键影响因素.
- 综合了各种关于蔬菜生产中的生物炭研究的数据.
主要成果:
- 生物炭对N2O排放的影响受到 (N) 应用率的重大影响.
- 在低N输入下 (≤300公斤N ha-1),生物炭减少了N2O,CO2和CH4排放量,分别为18.7%,17.9%和16.9%.
- 在高输入 (>300 kg N ha-1) 的情况下,生物炭显著增加了N2O,CO2和CH4排放量,分别为39.7%,43.0%和27.7%.
结论:
- 生物炭在温室气体排放调节方面具有双重作用,在低条件下有效,但在高条件下反作用.
- 土壤pH,土壤有机碳 (SOC),生物炭C/N比率,生物炭pH和热解温度是关键因素.
- 这些发现为可持续的农业管理和明智的生物炭应用策略提供了科学证据.
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