对土壤修饰的分子洞察 调节土壤和的生物可用性:协同DOM转换和微生物代谢重编程
Fei Zhou1, Mingxing Qi1, Wanchen Zhao1
1College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
Journal of agricultural and food chemistry
|February 16, 2026
概括
诸如生物炭和有机肥等土壤修改物通过影响微生物群落及其代谢而改变 (Se) 和 (Cd) 的生物可用性. 了解这些DOM-微生物-代谢物相互作用是有效的土壤管理的关键.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生物地质化学生物地质化学
背景情况:
- (Se) 和 (Cd) 在土壤中自然存在,对生态系统和人类健康构成风险.
- 土壤修改被用来管理金属的生物可用性,但Se/Cd调节的机制仍然不清楚.
- 了解对Se/Cd生物可用性的修改影响对于农业可持续性至关重要.
研究的目的:
- 为了研究超酸盐 (P),生物炭 (BC) 和有机肥 (OM) 如何影响Se和Cd在化土壤-菜种子系统中的生物可用性.
- 阐明潜在的机制,包括微生物群落的转移和代谢物变化.
- 为根据土壤Se/Cd生物可用性选择适当的修改提供见解.
主要方法:
- 应用三种土壤修改剂:超酸 (P),生物炭 (BC) 和有机 (OM).
- 分析 Se 和 Cd 在菜和土壤中的积累.
- 土壤有机物成分和微生物社区结构的表征 (16S rRNA测序).
- 代谢分析以确定生化途径的改变.
主要成果:
- 超酸 (P) 降低了Se的积累;生物炭 (BC) 增强了Se,但降低了Cd;有机 (OM) 降低了Se和Cd.
- 所有修正案都改变了土壤有机物成分,减少了微生物衍生的类成分 (C1).
- OM和BC显著丰富了Actinobacteriota,OM特别促进了*Promicromonospora*介导的Se/Cd固定.
- 代谢学表明对脂质,氨基酸和一般微生物代谢的修正特异性影响,影响Se转化和固定.
结论:
- 土壤修改通过涉及溶解有机物 (DOM),微生物群落和代谢物的复杂相互作用来调节Se/Cd的生物可用性.
- 有机肥料和生物炭通过刺激特定的微生物群体和代谢途径,显示出对Se和Cd的固定潜力.
- 修改选择应根据目标土壤的特定Se/Cd生物可用性特征进行调整.
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