Spectral pedology: A new perspective on evaluation of soils along pedogenetic alterations
Spectral pedology: A new perspective on evaluation of soils along pedogenetic alterations
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DOI：
10.1016/j.geoderma.2013.11.012
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发表时间：
2014-04-01
期刊：
影响因子：
6.1
通讯作者：
Terra, Fabricio da Silva
中科院分区：
文献类型：
--
作者：
Dematte, Jose A. M.;Terra, Fabricio da Silva
土壤学和光谱学在这门科学中的视角之间仍然缺乏知识。因此，描述土壤传感如何帮助这些土壤学家进行研究是很重要的。这项工作旨在展示近距离和遥感（VisNIR）对评价地形序列沿着的成土过程和母质蚀变的看法，并估计其矿物学含量。研究了来自不同分类单元的8个土壤类。土壤样品进行了理化，矿物学和反射光谱分析。在实验室条件下使用分光辐射计（400 - 2500 nm）获得反射率数据。系统聚类分析用于判别土壤类别，并通过多元线性回归对其性质进行评价。在深度的光谱行为（吸收功能和反射强度）的变化，使土壤类的特性。反射率数据与聚类分析允许区分土壤根据其风化程度和母质。粘土矿物含量估计具有合理的精度水平。土壤沿着的地形序列，可以通过反射光谱检测的反射强度和吸收功能的变化，主要是在纹理和矿物成分，分别。不同的风化程度，因此，土壤形成过程改变土壤沿着的地形序列，反映在他们的光谱行为，从而导致一个新的网站土壤可视化：光谱土壤学。(C)2013爱思唯尔有限公司版权所有。
There is still a lack between pedology and the knowledge of what is the perspective of spectroscopy in this science. Thus, it is important to describe how soil sensing can assist these pedologists on their studies. This work aims to show the perspective of proximal and remote sensing (VisNIR) on the evaluation of pedogenetic processes and parent material alterations along a toposequence and to estimate their mineralogical content. Eight soil classes from different taxonomic units were studied. Soil samples were submitted to physicochemical, mineralogical, and reflectance spectroscopy analyses. Reflectance data were acquired in laboratory conditions using a spectroradiometer (400-2500 nm). Hierarchical clustering analysis was applied to discriminate soil classes and their properties were assessed by multiple linear regression. Variations in spectral behavior in depth (absorption features and reflectance intensity) enabled the characterization of the soil classes. Reflectance data associated with clustering analysis allowed distinguishing the soils according to their weathering levels and parent materials. The clay mineral contents were estimated with a reasonable accuracy level. Soils along a toposequence can be detected by reflectance spectroscopy through variations in reflectance intensity and absorption features mainly in terms of the texture and mineralogical composition, respectively. Different weathering levels and, consequently, soil formation processes alter the soils along the toposequence which reflect on their spectral behavior, thus leading to a new site for soil visualization: the spectral pedology. (C) 2013 Elsevier B.V. All rights reserved.