评估高CO2对作物重金属积累的影响:元分析和对粮食安全的影响
Xunzhe Yang1, Ping Yun2, Xiaoxiang Zhao3
1Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; School of Agriculture and Environment, and UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
The Science of the total environment
|September 3, 2024
概括
大气中二氧化碳 (CO2) 的升高会降低作物中铁和等必需矿物质的含量,加剧"隐性饥饿". 这会影响人类健康,需要为营养丰富的作物进行育种.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 人类营养人类营养
背景情况:
- 由于人类活动导致大气中二氧化碳 (CO2) 度的上升影响了植物生理学.
- 虽然二氧化碳可以刺激植物生长,但它改变了作物的营养质量,影响了必需矿物质含量.
研究的目的:
- 综合分析二氧化碳增加对作物中必需和非必需重金属度的影响.
- 评估对人类健康的影响,并为政策和育种战略提供信息.
主要方法:
- 对1216个对联观测结果的元分析,比较在环境和高CO2条件下种植的作物.
- 对基本 (Cu,Fe,Mn,Zn,Mo,Ni) 和非基本 (Ba,Cd,Cr,Hg,Pb,Sr) 金属度变化的分析.
主要成果:
- 增加的二氧化碳显著降低了作物,特别是谷物中必需矿物质 (Cu,Fe,Mn,Zn) 的度.
- 非必需 (有毒) 金属的减少不那么明显,导致不良的必需/非必需金属比率.
- 这些变化加剧了"隐藏的饥饿",降低了人类饮食中的铁和等关键营养素.
结论:
- 增加的二氧化碳对作物营养质量和人类健康构成重大威胁.
- 政策变化和有针对性的植物育种对于开发具有提高营养利用效率和减少有毒金属吸收的作物至关重要.
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