Resumo

LUNA ROBLES, Jorge Alexis; CANTU SILVA, Israel; LUNA ROBLES, Erik Orlando  e  BEJAR PULIDO, Silvia Janeth. Physica and chemical evaluation of a Vertisol in two land uses in Northeastern Mexico. Rev. mex. de cienc. forestales [online]. 2025, vol.16, n.89, pp.4-28.  Epub 30-Jun-2025. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v16i89.1522.

The conversion of forest areas into agricultural and livestock lands, as well as intensive practices can cause soil degradation. The objective of this study was to analyze the effects of land use change on the physical (Bulk Density [BD], Porosity [P], Texture, Mechanical Resistance to Penetration [MRP]) and chemical properties (Organic Matter [SOM], Organic Carbon [%C], pH and Electrical Conductivity [EC]) of a Vertisol at different depths (0-5, 5-15, 15-30, 30-60 and 60-100 cm); considering that most research focuses only on the evaluation of the first centimeters of soil, so there is lack of knowledge and uncertainty about the behavior of edaphic variables in greater depth ranges. In each land use, four soil samples composed of depth (n=40) were collected. The chemical variables did not present significant differences between land uses, but between depths. The SOM and %C decreased significantly as depth increased, where the highest values were recorded at 0-5 cm in both land uses. The pH was moderately alkaline, while the EC was below salinity levels. In regard to physical properties, only BD and porosity showed significant differences between land uses (p<0.05); between depths, only the contents of sand and silt varied. MRP only presented differences between land uses (p<0.01). Vertisol presented greater sensitivity in the physical properties of the soil after the conversion of the Tamaulipan Thorny Scrub to Grassland.

Palavras-chave : Organic Carbon; Organic matter; Tamaulipan Thorny Scrub; Grassland; intensive practices; soil degradation.

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