Brejo paraibano soils: Climate, relief and source material influences

• Autor(a) principal: Carneiro, Kalline de Almeida Alves
• Data de Publicação: 2021
• Outros Autores: Sousa , Lucina Rocha, Fraga, Vânia da Silva, Silva , Auriléia Pereira da, Utuni , Vegner Hizau dos Santos, Santos, Roseilton Fernandes dos, Vendruscolo, Jhony
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/16545
• topic: SiBCS, taxonomia de solos, horizonte diagnóstico de superfície.; SiBCS; Taxonomia de solos; Horizonte diagnóstico de superfície.; SiBCS, taxonomía de suelos, horizonte diagnóstico de superficie.; SiBCS; Taxonomía de suelos; Horizonte diagnóstico de superficie.; Mineralogy, soil taxonomy, horizon surface diagnosis; Mineralogy; Soil taxonomy; Horizon surface diagnosis.

The soils of the micro-region of Brejo Paraibano are the result of weathering processes and pedogenesis, under the action of formation factors (source material, living organisms, climate, topography and time), taking place preferably in hot and humid regions, with strong wavy relief and predominance of Argisol, Latosol, Alfisol and Entisol classes. The objective of this study was to characterize and classify the soils of Legal Reserve Areas developed and representative of the cities of Areia-PB (P1) and Alagoa Nova-PB (P2), located in the microregion of Brejo Paraibano. Classified as Argisol (P1) and Latosol (P2), soils of the studied profiles showed predominance of sand fraction (> 680 g kg-1), texture ranging from sand clay to clay (P1) and clay to sand clay (P2), respectively. The pH in water ranging from 4.7 to 5.6 in both soils, while the cation exchange capacity values ranging from 14.4 to 31.7 cmolc dm-3 in the P1, and from 11.8 to 13.1 cmolc dm-3 in P2, with higher values of H+ and Ca2+ ions on P1. The subsurface horizons of P1 and P2 are dystrophic, showing umbric carater for P1, while the P2 showed typical carater. The P1 presented high activity clay relative to P2. In all horizons P1 and P2 there were morphological, physical, chemical and mineralogical attributes conditioned by the parental material and relief, demonstrating the influence of these factors in pedogenesis.