Analytical methods comparison for soil organic carbon determination in Andean Forest of Sangay National Park-Ecuador

A relationship among total organic carbon content determined by ignition loss (LOI) and DUMAS combustion methods, were perfomed in evergreen Andean eyebrow forest soils, southwestern zone of Sangay National Park- Ecuador, where three conglomerates were established as follows: (C) with five plots (P) with plots of 20 x 20 m. In each plot, five digging trenches and four soil samples were carried out at different depths: 0-10, 10-20, 20-30 and 30 cm, respectively. It is observed that the amount of total organic carbon obtained by the DUMAS and LOI method (R2 = 0.99) does not differ significantly. However, the DUMAS total organic carbon determination methodology showed greater precision with regard to LOI, thus becoming a good alternative to be used as a reference method. In addition, the operability in the laboratory is reflected in the reduction of time and optimization of the human resource. The correlation level shows a low level of significance among these methods, the variation is greater in the DUMAS method (3.38%), due to the analyzed volumes of the samples and the auxiliary equipment level of precision.

• Autores: Cargua Catagña, Franklin Enrique; Rodríguez Llerena, Marco Vinicio; Damián Carrión, Diego Armando; Recalde Moreno, Celso Guillermo; Santillán Lima, Guido Patricio
• Tipo de recurso: Article of journal
• Fecha de publicación: 2017
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/61068
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/61068; http://bdigital.unal.edu.co/59876/
• Palabra clave: 55 Ciencias de la tierra / Earth sciences and geology; 63 Agricultura y tecnologías relacionadas / Agriculture; Calcination; combustion; DUMAS; LOI; organic material; Calcination; combustion; DUMAS; LOI; organic material
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional