Contents of soil organic carbon under different agricultural and vegetation cover
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Abstract
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.
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