Caracterização física e química de latossolos e gleissolos no campo de Murundu do Córrego da Fortaleza, chapada oeste do Triângulo Mineiro

Abstract

This study was conducted in a catena consisting of Oxisols and Gleisols and is located in the area of the headwaters of the stream of Fortaleza (coordinates 19 ° 12\'44 \"S latitude and 48 ° 3\'13\" W longitude), Uberlândia, portion southern Chapada Uberlândia-Uberaba. The stream of Fortaleza is left tributary of the Rio Uberabinha The covoal is a microrelief comprising murundus, these present in greater amount at the edges, making it less significant in the center of the covoal where the presence of water is greater. The covoais are along the plateau, especially in the headwaters of drainages, and they correspond a small depressions in the ground that have bad drainage of the soil. These factors lead to the differentiation of soil characteristics of covoal in relation to its surrounding land. The objective of this study was to evaluate the soil differences in a catena at the head of the stream that joins Oxisol and Gleysoil to determine properties that can be used as a focus for reflection on the soillandscape. It was made analysis of grain size, porosity, macroporosity and microporosity, soil density, total oxides (SiO2, Al2O3, Fe2O3, CaO, MgO, TiO2, P2O5, Na2O, K2O and MnO), total carbon, humic substances, labile carbon and soluble carbon in water. It was found that the covoais were formed from pedogenetical processes with particulate material and solution loss, individualizing an environment of mild depression strongly influenced by the water table. The soils of this catena differ in their physical (grain size, porosity, microporosity, macroporosity and bulk density) and chemical characteristics (surface oxides SiO2, Al2O3, Fe2O3, CaO, MgO, TiO2, P2O5, Na2O, K2O and MnO; organic carbon total; Fractional Carbon; labile carbon and water soluble carbon) from environment more aerated (oxisol), to an environment downstream of the catena with water saturation (Hidromorphic soils).