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Spectroscopic investigations of mobility and speciation of fertilizer-derived copper, manganese, and zinc in calcareous soils

机译:石灰性土壤中化肥衍生的铜,锰和锌的迁移率和形态的光谱研究

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We employed a combination of several synchrotron based X-ray techniques namely, μ-X-ray fluorescence (μ- XRF); μ-X-ray absorption near edge structure spectroscopy (μ- XANES); μ-X-ray diffraction (μ-XRD) and "bulk" XANES/extended X- ray absorption spectroscopy (EXAFS) and XRD, to speciate different fertilizer derived-Cu, -Mn, and -Zn in highly calcareous soils to understand the chemistry underlying the observed differential behaviour (plant response, plant availability and mobility) of fluid and granular micronutrient forms. Combined use of different synchrotron based spectroscopic techniques suggested that, when fluid micronutrients were applied to soil, Cu, Mn, and Zn remained in comparatively more soluble solid forms whereas granular Mn and Zn tended to transform into comparatively less soluble solid forms.
机译:我们采用了几种基于同步加速器的X射线技术的组合,即μ-X射线荧光(μ-XRF); μ-X射线吸收近边缘结构光谱法(μ-XANES); μ-X射线衍射(μ-XRD)和“批量” XANES /扩展X射线吸收光谱法(EXAFS)和XRD,可在高钙质土壤中确定不同肥料衍生的Cu,-Mn和-Zn。观察到的流体和颗粒状微量营养素形式的差异行为(植物响应,植物有效性和迁移率)的化学基础结合使用不同的基于同步加速器的光谱技术表明,当将液体微量营养物应用于土壤时,Cu,Mn和Zn保持相对易溶的固体形式,而颗粒状Mn和Zn倾向于转变为相对难溶的固体形式。

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