Resumo

CARVAJAL-AGUDELO, Blanca N.  e  ANDRADE, Hernán J.. Organic carbon in soils with different systems of use in Tacarimena Yopal, Colombia. rev.udcaactual.divulg.cient. [online]. 2021, vol.24, n.1, e1921.  Epub 21-Abr-2021. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v24.n1.2021.1921.

Soil is an important carbon reservoir as it can store twice the amount that atmosphere does and three times the biomass, which makes it a key component for climate change (CC) mitigation projects. It is important to know the potential of soil organic carbon storage (SOC) in the main uses of the soli and their expected dynamics due to potential use changes. SOCS is estimated in 7 of the dominant land use systems in the area of the study, with 5 replicas as follows: 1) banana with shade (SAF+banana); 2) cocoa with shade (Ca+S); 3) citrus (C); 4) low silvopastoral system (SSPB); 5) high silvopastoral system (SSPA); 6) gallery forests (BG); and 7) bush forest (MM). SOC concentration was analyzed in samples composed of 25 soil sub-samples per plot, and the DA was estimated with the cylinder method in a simple per plot. All land uses studied can mitigate CC when storing SOC. BG was the system that showed the highest carbon storage. On the other hand, SAF+banana stored the least SOC (72,7 vs 33,4Mg/ha, respectively). Changes in land use can cause CO2 emissions or an addition in carbon fixation. Changes in land use that increase SOC allow CC mitigation, which makes them feasible for funding, thus allowing an improvement in the livelihood of local producers.

Palavras-chave : Bulk density; Emission; Mitigation; Ecosystem services; Agroforestry systems.

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