CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)

ABSTRACT The quantification of nutrient concentration in soils is important for the implementation of adequate fertilization strategies, and also to improve agricultural productivity. In recent decades, new instrumental methods have been developed, including the use of near infrared spectroscopy (NI...

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Autores principales:	Ortega,Iris Lobos, Valenzuela,Marta Alfaro, Lagos,Josué Martínez, Andrades,Paula Pavez
Lenguaje:	English
Publicado:	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias 2021
Materias:	volcanic soil calibration model FT-NIRS mineral composition
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902021000100032
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spelling	oai:scielo:S0719-389020210001000322021-05-16CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)Ortega,Iris LobosValenzuela,Marta AlfaroLagos,Josué MartínezAndrades,Paula Pavez volcanic soil calibration model FT-NIRS mineral composition ABSTRACT The quantification of nutrient concentration in soils is important for the implementation of adequate fertilization strategies, and also to improve agricultural productivity. In recent decades, new instrumental methods have been developed, including the use of near infrared spectroscopy (NIRS). Although its potential has been recognized by soil scientists for a few decades, the use of NIRS for routine soil analysis has been, to the best of our knowledge, poorly developed in Chile. Calibration models were developed by partial least squares regression (PLSR). The objective of this study was to assess the use of NIRS for the determination of concentrations of Calcium, Magnesium, Phosphorus, Potassium, pH (water), organic matter, Sodium, exchangeable aluminum, ammonium and nitrate in volcanic soils of southern Chile. The coefficient of determination in the calibration obtained ranged from 0.79 to 0.95 and 0.79 to 0.89 in Andisols and Ultisols, respectively. The residual prediction deviation (RPD) values varied between 2.1 and 4.4 in Andisols, and between 2.2 and 3.1 in Ultisols. It was not possible to generate robust calibration models for Al Exch, Na and NH4 + in Andisols and Al Exch, Mg, NO3 - and Na in Ultisols. Although some of the models developed presented high R2, this methodology requires further validation, including a greater number of samples from a wider spatial distribution, covering a variety of climatic and agricultural conditions.info:eu-repo/semantics/openAccessUniversidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias VeterinariasChilean journal of agricultural & animal sciences v.37 n.1 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902021000100032en10.29393/chjaas37-4ccil40004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	volcanic soil calibration model FT-NIRS mineral composition
spellingShingle	volcanic soil calibration model FT-NIRS mineral composition Ortega,Iris Lobos Valenzuela,Marta Alfaro Lagos,Josué Martínez Andrades,Paula Pavez CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
description	ABSTRACT The quantification of nutrient concentration in soils is important for the implementation of adequate fertilization strategies, and also to improve agricultural productivity. In recent decades, new instrumental methods have been developed, including the use of near infrared spectroscopy (NIRS). Although its potential has been recognized by soil scientists for a few decades, the use of NIRS for routine soil analysis has been, to the best of our knowledge, poorly developed in Chile. Calibration models were developed by partial least squares regression (PLSR). The objective of this study was to assess the use of NIRS for the determination of concentrations of Calcium, Magnesium, Phosphorus, Potassium, pH (water), organic matter, Sodium, exchangeable aluminum, ammonium and nitrate in volcanic soils of southern Chile. The coefficient of determination in the calibration obtained ranged from 0.79 to 0.95 and 0.79 to 0.89 in Andisols and Ultisols, respectively. The residual prediction deviation (RPD) values varied between 2.1 and 4.4 in Andisols, and between 2.2 and 3.1 in Ultisols. It was not possible to generate robust calibration models for Al Exch, Na and NH4 + in Andisols and Al Exch, Mg, NO3 - and Na in Ultisols. Although some of the models developed presented high R2, this methodology requires further validation, including a greater number of samples from a wider spatial distribution, covering a variety of climatic and agricultural conditions.
author	Ortega,Iris Lobos Valenzuela,Marta Alfaro Lagos,Josué Martínez Andrades,Paula Pavez
author_facet	Ortega,Iris Lobos Valenzuela,Marta Alfaro Lagos,Josué Martínez Andrades,Paula Pavez
author_sort	Ortega,Iris Lobos
title	CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
title_short	CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
title_full	CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
title_fullStr	CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
title_full_unstemmed	CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)
title_sort	chemical characterization of volcanic soils using near infrared spectroscopy (nirs)
publisher	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902021000100032
work_keys_str_mv	AT ortegairislobos chemicalcharacterizationofvolcanicsoilsusingnearinfraredspectroscopynirs AT valenzuelamartaalfaro chemicalcharacterizationofvolcanicsoilsusingnearinfraredspectroscopynirs AT lagosjosuemartinez chemicalcharacterizationofvolcanicsoilsusingnearinfraredspectroscopynirs AT andradespaulapavez chemicalcharacterizationofvolcanicsoilsusingnearinfraredspectroscopynirs
_version_	1714207180520947712

CHEMICAL CHARACTERIZATION OF VOLCANIC SOILS USING NEAR INFRARED SPECTROSCOPY (NIRS)

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