可持续农业的生物炭:改善土壤碳储存,减少耕地碳排放
1Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; Key Laboratory of Mountain Surface Process and Ecological Regulation, Chinese Academy of Sciences, Chengdu, 610041, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of environmental management
|November 6, 2024
概括
生物炭的应用显著降低了温室气体 (GHG) 排放,并增强了农田的土壤碳捕获. 这项研究揭示了生物炭.
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:
- 气候变化对生态安全构成重大威胁,农业用地有助于温室气体 (GHG) 排放.
- 不同的碳基材料 (草,有机 (OM),生物炭) 对土壤温室气体排放和碳 (C) 封存产生不同的影响.
- 了解这些差异对于优化农业实践至关重要.
研究的目的:
- 在实地实验中评估不同基于碳的材料对土壤温室气体排放的影响.
- 通过分子建模来研究材料特性影响土壤温室气体排放的潜在机制.
- 为可持续农业和生态安全提供见解.
主要方法:
- 实地实验评估不同C基材料应用 (草,OM,生物炭) 下的土壤温室气体排放.
- 分子建模计算,以探索物质性质对温室气体排放的影响机制.
- 对土壤有机碳变化和温室气体减排 (CO2eq) 的分析.
主要成果:
- 生物炭表现出优越的抗分解性和更高的温室气体吸附性,由于其物理化学特性,显著减少了排放.
- 草和OM的活性表面特性通过与酶相互作用加速了它们的分解.
- 与对照组相比,使用生物炭的小麦-玉米轮换使CO2排放减少了1089.8公斤CO2eq ha-1,土壤有机碳增加了141.8%.
结论:
- 生物炭是减少土壤温室气体排放和增强土壤碳捕获的有效材料.
- 材料属性对土壤温室气体动态和C封存潜力产生重大影响.
- 使用生物炭等材料优化作物残留物管理是可持续农业和生态安全的关键.
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