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土壤-大米系统中的和的动态:来自不同形式的肥应用的见解

Tianyi Yan¹, Quan Zhang², Haifei Chen³

¹Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Journal of environmental sciences (China)

|November 2, 2025

概括

肥有效地通过改变土壤化学和植物防御机制来减少大米中的吸收. 虽然对有好处,但它们对的影响需要进一步调查,以全面管理风险.

科学领域:

环境科学环境科学
农业化学农业化学
植物生理学植物生理学

背景情况:

(Mn) 对于减轻大米中 (Cd) 和 (As) 的吸收至关重要.
不同的Mn形式和度在土壤-大米系统中的Cd/As流动性的具体机制仍然不清楚.

研究的目的:

研究三种Mn化合物 (MnO2,MnSO4,MnCO3) 如何影响大米中Cd和As的积累.
阐明对Cd/As转位和植物反应的影响的潜在机制.

主要方法:

实地研究使用MnO2,MnSO4和MnCO3在不同的速度.
分析米粒和土壤微分中的Cd和As度.
测量土壤pH值和根生化指标 (SOD,Cys).
转录组分析以确定基因表达变化.

主要成果:

所有的治疗都显著降低了谷物Cd水平 (27.6-30.2%).
增强了Cd转化为较少移动的土壤分量 (碳酸盐结合) 并增加了铁板上的吸附.
MnSO4和MnCO3促进了根的抗氧化系统 (SOD,Cys),限制了Cd转位.
转录组数据显示Mn上调了抗氧化基因,限制了Cd传输 (OsABCC1,OsHMA3) 和促进了As转位 (OsLsi2).
由于谷物中的含量受到处理的影响不那么一致.

结论:

不同的化肥有效地降低了Cd的毒性,因为它使Cd在土壤中停滞不前,并限制了其运输.
化肥对As的可用性和吸收的影响很大,但需要进一步的研究才能充分理解这些影响.
结果提供了Mn在调节Cd和As固定和迁移中的作用的见解,有助于减少环境风险.

关键词:

亚是一种.生物可用性生物可用性是的组成部分.铁板是铁板的组成部分.形成的形式.文字转录文字转录文字转录

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