生物炭的长期应用对粮食安全和气候变化减缓的持续益处
Jingrui Yang1,2, Longlong Xia1,2, Kees Jan van Groenigen3
1State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 211135, China.
概括
长期的年度生物炭应用维持和增强土壤的益处,提高作物产量和减少温室气体排放. 定期应用是最大化生物碳的关键.
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:
- 生物炭的应用显示出对粮食安全和气候变化减缓的前景.
- 有限的长期数据存在于生物炭的可持续性好处,特别是每年增加土壤.
研究的目的:
- 评估年度生物炭应用对土壤特性,作物产量和温室气体排放的长期影响.
- 为了比较长期年度与单个生物炭应用的影响.
主要方法:
- 分析来自438项研究的全球数据集 (3229个观察).
- 包括29项全球长期实验 (4至12年) 的数据.
主要成果:
- 长期的年度生物炭应用 (≥4年) 持续或增强效益,包括农作物产量增加10.8%.
- 甲 (-13.5%) 和氧化 (-21.4%) 排放量显著减少.
- 长期应用后,土壤有机碳含量增加了52.5%,而单次应用的好处随着时间的推移而逐渐减少.
结论:
- 从长远来看,每年使用生物炭对提高作物产量和缓解气候变化是有效的.
- 生物炭的好处程度受土壤特性,气候和管理实践的影响.
- 建议根据当地条件量身定制的战略性,定期的生物炭应用,以最大限度地提高持续的益处.
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