Uso de técnicas espectroscópicas no estudo de solos em diferentes feições geomorfológicas na microbacia de vaca brava, AREIA - pb.

Abstract

The land use has caused significant changes in the dynamics of natural ecosystems. As a result of the adoption of intensive mechanization and inadequate management, soil presents changes in its physical, chemical and biological, losing nutrients, organic matter and thereby reducing crop yields. Therefore, monitoring of cultivated land is fundamental to the development of sustainable agriculture. Thus, several techniques have been employed to distinguish soil, among them the physical, thermal and spectroscopic are distinguished by being simple to implement and to be able to determine the behavior of the samples by determining and quantifying mineral elements and structures. Spectroscopic techniques such as X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD) stand out in practicality because they are rapid and do not destroy the samples, which may be again utilized. The study was conducted in Watershed de Vaca Brava, located in the city of Areia-PB. Initially 06 areas were selected, 02 for each agroecosystem (Grassland, Forest and Family Agriculture) in different relief positions, collected after the samples were subjected to chemical analysis by XRF and XRD mineralogical. Therefore, we may conclude that relief position, so how different types of land use and management assessed cause variations in fertility, depending on the processes of leaching and percolation.