Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador.
The Loss On Ignition (LOI) method is used to estimate the soil organic matter (SOM) but has its advantages and limitations compared to other methods that calculate it from organic carbon (OC). The objective of the work was to calibrate the LOI method for use in alluvial soils culti...
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Universidad Nacional del Litoral
2020
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| Acceso en línea: | https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9747 |
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oai:bibliotecavirtual.unl.edu.ar:article-97472020-11-30T16:46:23Z Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. EVALUACIÓN DEL MÉTODO DE IGNICIÓN PARA DETERMINAR MATERIA ORGÁNICA EN SUELOS DE LA PROVINCIA EL ORO-ECUADOR BARREZUETA-UNDA, S. CERVANTES-ALAVA, A. ULLAURI-ESPINOZA, M. BARRERA-LEON, J. CONDOY-GOROTIZA, A. The Loss On Ignition (LOI) method is used to estimate the soil organic matter (SOM) but has its advantages and limitations compared to other methods that calculate it from organic carbon (OC). The objective of the work was to calibrate the LOI method for use in alluvial soils cultivated with cocoa (Theobroma cacao L.). Thirty soil samples were extracted from 0 to 30 cm depth, and the following were determined SOM by LOI at 350, 430 and 600°C for 2h. These samples werecontrasted with the dry combustion (DC) and Walkley and Black (WB) methods for OC determinations. The values obtained by LOI increased from 3,46% <4,95%<7,66%, when the temperature increased, being lower than those obtained with DC (1,85%) and WB (1,96%). The best linear adjustment obtained between LOI and DC was, at 430°C with an explanation coeffi cient (R2) equal to 0.83. Although the LOI method at 430°C was the best fi t to be used in the SOM calculation, more repetitions should be done for a better calibration model. El método de pérdida de peso por ignición (Loss On Ignition -LOI) se utiliza para estimar la materia orgánica del suelo (MOS) pero tiene sus ventajas y limitaciones, frente a otros métodos que lo calculan partiendo del carbono orgánico (CO). El objetivo del trabajo fue, calibrar el método LOI para utilizarlo en suelos de origen aluvial cultivados con cacao (Theobroma cacao L.). Se utilizaron 30 muestras de suelo extraída entre 0 a 30cm de profundidad, en las que se determinaron la MOS por LOI a 350, 430 y 600°C durante 2h y que fueron contrastadas con las determinaciones del por CO combustión seca (DC) y Walkley y Black (WB). Los valores obtenidos por LOI aumentaron de 3,46% <4,95%<7,66%, al incrementar la temperatura, siendo inferiores a los obtenidos con DC (1,85%) y WB (1,96%). El mejor ajuste lineal obtenido entre LOI y DC fue, a 430°C con un coeficiente de explicación (R2) igual a 0,83. Aunque el método LOI a 430°C fue el de mejor ajuste para ser utilizada en el cálculo de la MOS se deben realizar más repeticiones para un mejor modelo de calibración. Universidad Nacional del Litoral 2020-11-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo Articulo info:ar-repo/semantics/artículo application/pdf application/octet-stream https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9747 10.14409/fa.v19i2.9747 FAVE Sección Ciencias Agrarias; Vol. 19 Núm. 2 (2020): FAVE Sección Ciencias Agrarias; 25-36 FAVE Sección Ciencias Agrarias; Vol 19 No 2 (2020): FAVE Sección Ciencias Agrarias; 25-36 FAVE Sección Ciencias Agrarias; v. 19 n. 2 (2020): FAVE Sección Ciencias Agrarias; 25-36 2346-9129 1666-7719 10.14409/fa.v19i2 spa info:eu-repo/grantAgreement/EC/FP7/ https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9747/13023 https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9747/13024 info:eu-repo/semantics/openAccess Derechos de autor 2020 FAVE Sección Ciencias Agrarias |
| institution |
Universidad Nacional del Litoral |
| collection |
Publicaciones periódicas |
| language |
spa |
| format |
Artículo revista |
| description |
The Loss On Ignition (LOI) method is used to estimate the soil organic matter (SOM) but has its advantages and limitations compared to other methods that calculate it from organic carbon (OC). The objective of the work was to calibrate the LOI method for use in alluvial soils cultivated with cocoa (Theobroma cacao L.). Thirty soil samples were extracted from 0 to 30 cm depth, and the following were determined SOM by LOI at 350, 430 and 600°C for 2h. These samples werecontrasted with the dry combustion (DC) and Walkley and Black (WB) methods for OC determinations. The values obtained by LOI increased from 3,46% <4,95%<7,66%, when the temperature increased, being lower than those obtained with DC (1,85%) and WB (1,96%). The best linear adjustment obtained between LOI and DC was, at 430°C with an explanation coeffi cient (R2) equal to 0.83. Although the LOI method at 430°C was the best fi t to be used in the SOM calculation, more repetitions should be done for a better calibration model. |
| author |
BARREZUETA-UNDA, S. CERVANTES-ALAVA, A. ULLAURI-ESPINOZA, M. BARRERA-LEON, J. CONDOY-GOROTIZA, A. |
| spellingShingle |
BARREZUETA-UNDA, S. CERVANTES-ALAVA, A. ULLAURI-ESPINOZA, M. BARRERA-LEON, J. CONDOY-GOROTIZA, A. Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| author_facet |
BARREZUETA-UNDA, S. CERVANTES-ALAVA, A. ULLAURI-ESPINOZA, M. BARRERA-LEON, J. CONDOY-GOROTIZA, A. |
| author_sort |
BARREZUETA-UNDA, S. |
| title |
Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| title_short |
Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| title_full |
Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| title_fullStr |
Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| title_full_unstemmed |
Assessing Loss on ignition to determine organic matter in soils of the El Oro province of Ecuador. |
| title_sort |
assessing loss on ignition to determine organic matter in soils of the el oro province of ecuador. |
| publisher |
Universidad Nacional del Litoral |
| publishDate |
2020 |
| url |
https://bibliotecavirtual.unl.edu.ar/publicaciones/index.php/FAVEAgrarias/article/view/9747 |
| _version_ |
1686073062577930240 |
| score |
11.8626 |