Methods of soil organic carbon determination in Brazilian savannah soils

Authors

  • Juliana Hiromi Sato University of Brasília; ICC Sul; Faculty of Agronomy and Veterinary Medicine
  • Cícero Célio de Figueiredo University of Brasília; ICC Sul; Faculty of Agronomy and Veterinary Medicine
  • Robélio Leandro Marchão Embrapa Cerrados
  • Beáta Emöke Madari Embrapa Rice and Beans
  • Luiz Eduardo Celino Benedito University of Brasília; ICC Sul; Faculty of Agronomy and Veterinary Medicine
  • Jader Galba Busato University of Brasília; ICC Sul; Faculty of Agronomy and Veterinary Medicine
  • Diego Mendes de Souza Embrapa Rice and Beans

DOI:

https://doi.org/10.1590/0103-9016-2013-0306

Abstract

Several methods exist for determining soil organic carbon, and each one has its own advantages and limitations. Consequently, a comparison of the experimental results obtained when these methods are employed is hampered, causing problems in the comparison of carbon stocks in soils. This study aimed at evaluating the analytical procedures used in the determination of carbon and their relationships with soil mineralogy and texture. Wet combustion methods, including Walkley-Black, Mebius and Colorimetric determination as well as dry combustion methods, such as Elemental and Gravimetric Analysis were used. Quantitative textural and mineralogical (kaolinite, goethite and gibbsite) analyses were also carried out. The wet digestion methods underestimated the concentration of organic carbon, while the gravimetric method overestimated. Soil mineralogy interfered with the determination of carbon, with emphasis on the gravimetric method that was greatly influenced by gibbsite.

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Published

2014-08-01

How to Cite

Sato, J. H., Figueiredo, C. C. de, Marchão, R. L., Madari, B. E., Benedito, L. E. C., Busato, J. G., & Souza, D. M. de. (2014). Methods of soil organic carbon determination in Brazilian savannah soils . Scientia Agricola, 71(4), 302-308. https://doi.org/10.1590/0103-9016-2013-0306

Issue

Section

Soils and Plant Nutrition