Utilização da espectroscopia de reflectância em abordagens quantitativas e qualitativas da textura dos solos do perímetro irrigado de Morada Nova - CE

Abstract

Many studies have highlighted the potential of reflectance spectroscopy for soil study, including texture prediction, in different regions of Brazil. The objective of this work was to obtain quantitative models of soil particle size prediction of irrigated perimeter of Morada Nova-CE, using reflectance spectroscopy data, also obtaining a qualitative approach of the data with the characterization of its spectral behavior. A total of 85 deformed soil samples were collected from 0 to 10 cm deep and subsequently prepared for TFSA. Analyzes were performed by laboratories to use their particle size by pipette method. Radiometric data were used in the controlled environment using the FieldSpecPro FR 3 (350 - 2500 nm) spectrometer, which is attached to a contact probe, obtaining a media of three readings per sample. Spectral behavior was characterized by the average spectrum of the textural classes classified for soil fins, also evaluated as the variations of areas influence this behavior. The models were used by RLS and stepwise multiple linear regression systems. Given the two statistical systems found, which is the most efficient model and the only possible prediction of applicable requirements, was the SMRL method. Concluding, therefore, for how the collected values and the collected data, it was only possible to estimate or assign a reflection spectroscopy resource by the SMRL method and obtain a very good attribute prediction model.