Aplicação da cromatografia de Pfeiffer no diagnóstico das características de uso da terra

Abstract

Soil degradation, resulting from its intensive use, has reached unsustainable proportions in vast areas of the world. This situation requires the use of monitoring methods that are capable of detecting the dynamics of the degradation processes, making decisions possible in order to minimize or control such processes. Various methods can be used, among these, unconventional techniques such as Pfeiffer's chromatography. In this sense, the objective of this work was to apply and evaluate the technique in the diagnosis of soil characteristics under different land use systems. Thus, qualitative research was used in the study and evaluation of four areas, located in the city of Cruz das Almas - BA, being: 1 - Jungle (Cazuzinha); 2 - Direct Planting System; 3 - Conventional Planting System; 4 - Pasture. In each area three replicates of deformed samples were collected from the middle third of the soil depth of 0.0-0.20 m, which allowed the preparation of twelve analyzes, totaling 12 chromatograms. The results showed that the protocol of methodological execution of the technique was efficient and economically feasible, easy to perform; that the chromatograms generated showed a homogeneity of repetition in the visual analysis of color variations, formed patterns, harmonic integrity between simple and compound treatments, with a degree of sensitivity to discriminate the changes determined by land use in the parameters of structure and aeration of the soil, microbial activity, enzymatic diversity, availability of nutrients and organic matter between the different treatments.