美国玉米带的气候改善带来了碳排放和农业效益
David J Beerling1, Dimitar Z Epihov1, Ilsa B Kantola2
1Leverhulme Centre for Climate Change Mitigation, School of Biosciences, University of Sheffield, Sheffield S10 2TN, United Kingdom.
概括
使用粉碎玄武岩的陆地增强气候显著提高了作物产量和土壤健康. 这一二氧化碳去除战略显示了减缓气候变化和改善粮食安全的潜力.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 地质化学 地质化学
背景情况:
- 陆地增强气候 (EW) 是一个有前途的二氧化碳去除 (CDR) 战略.
- 评估商业农业实践的EW绩效至关重要.
- 酸盐岩的气候变化,就像压碎的玄武岩一样,在农田上提供了可扩展的CDR潜力.
研究的目的:
- 在典型的玉米-大豆作物旋转下评估陆地增强气候 (EW) 的表现.
- 量化EW的二氧化碳去除 (CDR) 潜力.
- 评估EW对作物产量,土壤特性和营养吸收的影响.
主要方法:
- 在一家玉米-大豆轮转农场,在四年 (2016-2020年) 的时间里进行了大规模的,复制的EW实地试验.
- 在每秋季50t ha-1yr-1的压碎玄武岩应用.
- 监测了阴离子损失,二氧化碳去除,作物产量,土壤参数和营养度.
主要成果:
- 实现了保守的累积CDR潜力10.5 ± 3.8二氧化碳ha-1.1.
- 玉米和大豆产量显著增加 (12-16%).
- 提高了土壤肥力,减少了酸性化,增加了营养吸收,而没有显著的微量金属积累.
结论:
- 用粉碎的玄武岩进行增强的气候变化是去除二氧化碳的可行策略.
- 电动化改善了作物产量和营养状况,有助于粮食安全.
- 广泛采用EW可以大大促进净零排放目标,并加强土壤安全.
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