关于植物中同位素特征的研究:为食品生产区可追溯性提供参考
Jiahui He1, Xiaojing Han2,3, Yunlu Jiang2,3
1School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China.
Journal of agricultural and food chemistry
|August 7, 2025
概括
使用同位素 (Sr) 追踪农产品的来源至关重要. 这项研究发现,在树木和灌木中分析Sr可以提供可靠的基线数据,改善各种作物的食品可追溯性.
科学领域:
- 地质化学 地质化学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- (Sr) 同位素比例 (Sr/Sr) 对于追踪农产品来源和确保食品质量至关重要.
- 由于季节性变化和土壤地质相互作用的复杂性,现有的方法面临挑战.
- 开发可靠的基线Sr同位素地图对于准确的可追溯性至关重要.
研究的目的:
- 为了确定最佳的代理植物样本来构建可靠的同位素 (87Sr/86Sr) 基线图.
- 评估不同植被生命形式 (草药,灌木,树木) 和母体材料对Sr同位素特征的影响.
- 克服与季节性变化有关的农业可追溯性的方法限制.
主要方法:
- 在土壤和三个植被生命形式 (多年草,灌木,树木) 中分析 (Sr) 同位素 (87Sr/86Sr).
- 植物器官 (根,叶,茎) 和相应的土壤之间的同位素组成的比较.
- 评估不同母体材料 (浮气和残留) 中的同位素特征.
主要成果:
- 在根和土壤之间观察到Sr/Sr比率的显著差异,特别是在eolian土壤中.
- 在残留母体材料上的树木和灌木显示了各器官均的同位素签名.
- 树木和灌木中的Sr比率与混合表面植被有很强的相关性 (R2>0.85),表明它们作为代理的适用性.
- 多种植物采样有效克服了影响农业可追溯性的季节性变化.
结论:
- 来自多种植物,特别是树木和灌木的Sr异地图为农业起源追踪提供了一种可靠的方法.
- 这种方法为交叉植物类型框架提供了理论基础,以协调作物数据并完善植物资源采购方法.
- 这些发现提高了农产品地理来源追踪的准确性和稳定性.
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