Resumo

DUARTE, Paulino; FIGUEIREDO, Albano  e  NUNES, Adélia. Assessing the influence of combustion time on the determination of soil organic carbon in two types of evergreen forest. GOT [online]. 2020, n.20, pp.280-293.  Epub 30-Dez-2020. ISSN 2182-1267.  https://doi.org/10.17127/got/2020.20.012.

Climate change related to global warming called attention to the urgency on identifying and implement adaptation and mitigation strategies, aiming to reduce potential impacts. In this context, measures dedicated to reduce greenhouse gases emissions assumed great importance. In the case of carbon dioxide, beyond emissions reduction, several measures have been also focused on increasing sink capacity, namely in the soil. In this context, different studies evaluated the amount of organic carbon in different soil conditions and land use, having by reference different methodologies. In the case of those that based the assessment on the combustion of organic matter, different parameters in terms of time length and temperatures have been used, limiting the possibility of comparing results. This work aims to assess if time length has clear interference on results, using by reference different soil types and forests. For this study soil samples were collected at different depths on different geological substrates and for the two most common evergreen forests extant on Centro Region of Portugal. Each sample was used to obtain organic carbon values, based on the combustion approach, and having by reference three different time lengths (3, 4, 6 hours). The analysis of results shows that no significant differences were found on results considering time length used for combustion, despite significant differences in terms of organic matter among soil types.

Palavras-chave : Organic Matter; soils; pine forest; eucalyptus forest..

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