Abstract

YESCAS-CORONADO, Pedro et al. Temporal analysis of the organic carbon content of the soil in an arid region of Mexico. Rev. Mex. Cienc. Agríc [online]. 2018, vol.9, n.6, pp.1181-1191. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v9i6.1583.

The content and behavior of soil organic carbon (COS) in arid regions; through time, they are unknown, even though bovine manure amendments in these soils have become important in the extensive agricultural systems of those regions, there is no information that reveals the changes in the status of the COS. For this reason, the objectives of this research were to establish the distribution of the COS content of the municipality of Matamoros, Coahuila, and to determine the changes in its concentration over time. Soil samples from the surface layer (0-30 cm) in 2015, were collected, to estimate the COS content. These data and their georeferences were used to perform an interpolation with the Ordinary Krigin geostatistical method and obtain a thematic map of COS distribution. Likewise, COS base data for 2002, acquired from previous work, were used to obtain another thematic map of the municipality. The maps were compared with a cross-referenced table and with the Kappa concordance index (ICK). The results showed that the maps are not the same, as confirmed by the ICK= 0.1, in such a way that in thirteen years the COS increased 65 511.88 Mg. The determination of the COS content and the establishment of its spatial distribution, as well as its comparison with data and base maps of existing COS, allowed to determine the changes in the COS contents over time.

Keywords : cartography; COS; Kappa.