重新定义土壤标准:为更安全的粮食生产,特定于作物的生物可用门
Ze-Wen Wang1, Yan-Qing Liu1, Yu-Zhen Yuan2
1State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Ecotoxicology and environmental safety
|October 12, 2025
概括
这项研究引入了可生物利用的 (BAs) 作为比总更优越的土壤风险指标. 生物可用值和预测模型提高了评估污染的准确性,以提高农业和人类健康的安全性.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 毒理学 毒理学 毒理学
背景情况:
- 土壤中的 (As) 污染通过饮食摄入对人类健康构成重大风险.
- 现有的总土壤标准不充分评估风险,与食品安全不一致,促进进入食物链.
研究的目的:
- 提出土壤生物可用 (BAs) 作为评估污染风险的更准确指标.
- 开发基于作物安全的土壤风险评估框架,使用BA.
- 建立土壤BA的特定作物安全门.
主要方法:
- 关于叶菜,小麦和大米的综合现场采样和文献数据.
- 开发了用于干旱和土的标准化BA提取协议.
- 建立了基于BA的模型来预测作物中的含量,并推导出作物特定的安全值.
主要成果:
- 开发了标准化的BA提取协议 (干旱地为0.5M NH4H2PO4;土为0.43M HNO3).
- 使用基于BA的模型,在作物中的As水平方面实现了高预测准确度 (R2 > 0.7).
- 已建立的特定作物土壤BA安全门:17.62毫克/公斤 (叶菜),38.99毫克/公斤 (小麦) 和0.79毫克/公斤 (大米).
- 比总A标准,BA的值和模型的准确性显著更高 (57.4%用于小麦,74.4%用于大米).
结论:
- 生物可用 (BAs) 是一个比总更准确的土壤风险评估指标.
- 开发的基于BA的框架和特定作物的门提高了污染地区的精密农业.
- 这种方法优化了分析效率和人类健康保护,通过仅基于土壤BA的预测积.
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