Impacto de dos usos de suelo en el almacenamiento de carbono orgánico en el litoral ecuatoriano

Abstract

The changes in land use between forest and agricultural systems have consequences on some soil properties, as well as directly on soil organic carbon COS storage. The aim of the research was to compare the levels of COS stored at three depths in two land uses. For this, it was necessary to select a land use with anthropogenic incidence banana and a forest area secondary forest, where several plots of 25x25 m were delimited. In each plot, pits of 1x1 m were constructed from which soil samples were extracted from 0-10 cm, 10-20 cm and 20-30 cm depth, to determine various physicochemical properties. The textural classes were: sandy loam (banana) and loam forest area. The maximum value of bulk density (Bd) was 1.49 g/cm3 0-10 cm in the banana soil use, while in the forest area it was 1.36 g/cm3 20-30 cm. The average organic carbon OC for each depth was higher in the forest area, where it ranged from 2.83% (0-10 cm) to 0.69% (20-30 cm) of OC. Significant differences were found between the levels of COS stored by soil use and depth, with the highest averages being: 29.83 Mg/h-1 forest area; 0-10 cm, 11.67 Mg/ha-1 forest area; 10-20 cm and 11.43 Mg/ha-1 banana; 0-10 cm. COS storage was not directly related to soil texture, but a negative correlation was found between COS and Bd.