Abstract

MONDRAGON VALENCIA, Víctor Alfonso; MORENO HURTADO, Flavio  and  JARAMILLO JARAMILLO, Daniel Francisco. Impact of land use on organic carbon sequestration in a natural area of Medellín, Colombia. Acta Agron. [online]. 2022, vol.71, n.1, pp.39-46.  Epub Apr 25, 2023. ISSN 0120-2812.  https://doi.org/10.15446/acag.v71n1.101342.

This study evaluated soil organic carbon sequestration (SOC) in four vegetation covers (secondary vegetation [VS], forest plantations of Eucalyptus globulus (EUC) and Pinus patula [PIN] and pastures [PAS]), and its correlation with the physicochemical properties of the soil. Soil samples were taken at two depths in the A horizon (0-10 and 10-20 cm). Soil physicochemical variables were measured to evaluate their relationship with changes in SOC sequestration. We found that the highest SOC storage was in horizon A of EUC (100.5 ton C ha-1), followed by PAS (75.55 ton C ha-1), PIN (66.70 ton C ha-1) and SV (56.53 ton C ha-1). The SOC was significantly and positively correlated with the maximum water retention capacity, structural stability index, content of sand, clay, and carbon in humic and fulvic acids. However, SOC was negatively correlated with apparent density, state of aggregation, silt content, pH and CICE. These results suggest that cover change significantly affects SOC sequestration, soil organic matter characteristics, and soil physicochemical properties.

Keywords : plant cover; soil organic matter; soil properties; statistical significance.

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