标题：Potentiality of laboratory visible and near infrared spectroscopy for determining clay content in forest soil: a case study from high forest beech (fagus sylvatica) in Calabria (southern Italy)
期刊名称：EQA - International Journal of Environmental Quality
印刷版ISSN：2281-4485
出版年度：2013
卷号：11
期号：11
页码：49-64
DOI：10.6092/issn.2281-4485/4172
语种：English
出版社：Alma Mater Studiorum - University of Bologna
摘要：Clay content is the most important textural fraction because affects soil fertility and productivity. Reflectance spectroscopy in the visible and near infrared (Vis-NIR, 350-2500 nm) spectral region could be an alternative to laboratory standard methods. This paper was aimed to develop a calibration model with laboratory-based soil Vis-NIR spectra for clay content determination and mapping clay content using a geostatistical approach. Soil samples were collected at 235 locations in a forest area of southern Italy and analyzed in laboratory for clay content and Vis-NIR spectroscopic measurements. Partial least squared regression (PLSR) was applied to establish a relationships between reflectance and clay content. Calibration model was developed using only 175 samples, while the remaining 60 samples were used for testing the model. The results of PLSR were satisfactory and ordinary kriging was used for spatial interpolation of clay content determined both using conventional method and the PLSR model.
其他摘要：Clay content is the most important textural fraction because affects soil fertility and productivity.Reflectance spectroscopy in the visible and near infrared (Vis-NIR, 350-2500 nm) spectral region could be an alternative to laboratory standard methods.This paper was aimed to develop a calibration model with laboratory-based soil Vis-NIR spectra for clay content determination and mapping clay content using a geostatistical approach.Soil samples were collected at 235 locations in a forest area of southern Italy and analyzed in laboratory for clay content and Vis-NIR spectroscopic measurements.Partial least squared regression (PLSR) was applied to establish a relationships between reflectance and clay content. Calibration model was developed using only 175 samples, while the remaining 60 samples were used for testing the model. The results of PLSR were satisfactory and ordinary kriging was used for spatial interpolation of clay content determined both using conventional method and the PLSR model.
关键词：soil clay content;Vis-NIR spectroscopy;PLSR;ordinary kriging;southern Italy;teneur de l’argile;spectroscopie Vis-NIR;PLSR;krigeage ordinaire;sud de l’Italie;contenuto in argilla;spettroscopia Vis-NIR;PLSR;kriging ordinario;sud Italia
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