Understanding the fate of iron from foliar-applied Fe nanoparticulate fertilizers in crops using XAS spectroscopy combined with Fe isotopic

To reduce conventional fertilizer environmental inputs, foliar-applied nanoparticulate (NP) fertilizers are being developed. In addition to being more efficient, they will help avoid the contamination of agricultural soils in toxic elements found in conventional fertilizers. However, it remains unclear how foliar-applied NP fertilizers are assimilated into the leaves, and how the nutrients they deliver are used by the crops. Here, we designed a Fe based NP fertilizer to deliver Fe, a crucial nutrient that is often depleted in agricultural soils, and for which plants have developed two acquisition strategies. We propose to follow the fate of foliar-applied Fe from FeNP in two edible plants (tomato, type I, Fe redox-based and wheat, type II, Fe3+ complexation-based) using a multi-technique approach. By combining Fe K-edge XANES and EXAFS measurements with Fe isotopic measurements, we will track the pathways and mechanisms that affect Fe from foliar-applied FeNP fertilizer in our plants.

为减少传统化肥的环境负荷，叶面施用型纳米颗粒（NP）肥料正处于研发阶段。这类肥料不仅施用效率更高，还可避免传统化肥中所含有毒元素对农田土壤造成的污染。然而，叶面施用型纳米颗粒肥料如何被叶片吸收，以及其所携带的养分如何被作物利用的机制仍不明晰。本研究设计了一款铁基纳米颗粒肥料以施加铁元素——铁是农田土壤中常出现匮乏的关键营养元素，且植物已演化出两种获取铁的策略。本研究拟采用多技术联用手段，追踪两种食用作物（Ⅰ型为基于铁氧化还原机制的番茄，Ⅱ型为基于Fe³+络合机制的小麦）叶面施用铁基纳米颗粒肥料后，其中铁元素的归趋。通过将铁K边X射线吸收近边结构（XANES）、扩展X射线吸收精细结构（EXAFS）测量与铁同位素分析相结合，本研究将追踪叶面施用铁基纳米颗粒肥料后，影响作物体内铁元素迁移转化的路径与机制。

搜集汇总

背景与挑战

背景概述

该数据集研究叶面施用铁纳米颗粒肥料在作物中的吸收和利用机制，旨在减少传统肥料的环境污染。数据集采用XAS光谱和铁同位素技术，追踪铁在番茄和小麦两种植物中的命运，属于环境科学领域，由欧洲同步辐射设施于2026年发布，遵循开放获取许可。