Abstract

CASTILLO-PACHECO, Lucía A.; BOJORQUEZ-SERRANO, Jose I.; HERNANDEZ-JIMENEZ, Alberto  and  GARCIA-PAREDES, Diego. Contents of soil organic carbon under different agricultural and vegetation cover. cultrop [online]. 2016, vol.37, n.3, pp. 72-78. ISSN 1819-4087.  http://dx.doi.org/10.13140/RG.2.1.2035.4805.

Soil organic carbon (SOC) represents the major soil reservoir in the terrestrial ecosystems. The deforestation and the intensive agriculture use increases the CO₂ emissions to the atmosphere, promoting the processes related with global climatic change. The objective of this work was to measure the content of SOC under different vegetation covers at the Mololoa basin in Nayarit State, Mexico. Using geomorphological regionalization and land use maps by geographic information system, 27 sampling sites were established. For each soil sampling of 30 cm depth, with three replicates in each site. The samples obtained were analyzed for bulk density, the organic carbon concentration and the carbon content within the top 30 cm depth. The was calculated oak forest had the highest SOC content (140 Mg ha^-1). The SOC contents under grassland, secondary vegetation, pine forest, crop land and tropical forest were similar among them (99, 83, 73, 53 and 53 Mg ha^-1, respectively). The land cover with higher SOC content were oak forest for its higher SOC concentration and the crop land for its higher area occupied within the studied basin

Keywords : primary forests; tropical forests; land use.

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