被遗弃的耕地在支持粮食安全和气候变化减缓方面的被忽视的作用
Qiming Zheng1,2, Tim Ha3, Alexander V Prishchepov4,5
1Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. qiming.zheng@polyu.edu.hk.
Nature communications
|September 28, 2023
概括
在全球范围内,有1.01亿公的废弃耕地为粮食生产和减缓气候变化提供了巨大的潜力. 这些地区的战略土地管理是加强粮食安全和实现气候目标的关键.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 气候科学 气候科学
背景情况:
- 农田被遗弃是一个广泛的全球现象,尽管农业用地的稀缺性越来越大,但仍在发生.
- 废弃的耕地为增强粮食安全和缓解气候变化提供了双重机会.
研究的目的:
- 调查利用全球废弃的耕地进行再生和森林恢复的潜力和权衡.
- 用空间显式建模分析废弃农田的粮食生产和气候变化缓解能力.
主要方法:
- 空间显式建模和场景分析被用来评估1992年至2020年间全球废弃的耕地.
- 量化了粮食生产的潜力 (Peta-calories yr-1) 和气候变化减缓的净潜力 (MtCO2 yr-1).
- 评估土地适用性和土地分配战略对可实现潜力的影响.
主要成果:
- 在全球范围内确定了1.01亿公废弃的耕地.
- 估计的并发潜力范围为29至363 Peta-calories yr−1用于粮食生产和290至1,066 MtCO2 yr−1用于气候缓解.
- 证明空间优先级是最大限度地发挥这些潜力的关键.
结论:
- 废弃的耕地是同时解决粮食安全和气候变化减缓问题的宝贵资源.
- 可持续的土地管理,以空间优先级为基础,可以从这些土地中获得重大收益.
- 调查结果为可持续土地利用的政策和实践提供了及时的见解.
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