Caracterização espectroscópica de amostras de cama e ração de frango de um aviário localizado no sudoeste do Paraná

Abstract

In recentes years, the poultry industry has been growing in Brazil, making the country one of the main producers of poultry. The Paraná, among the states, is the largest producer in the country, responsible for 31.12% of production. With the increasing increase of this activity, there was also a significant increase in the other products, especially the poultry litter. Thus, the objective of this work was to characterize, by Fourier Transform Infrared Spectroscopy (FTIR) and Near Infrared Spectroscopy (NIR) poultry litter samples, from three lots, and animal food, collected in an aviary located in the southwest of Paraná. FTIR spectra were obtained from characterization of KBr pellets (150 mg KBr: 1.5 mg sample) using 64 scans in the range of 4000 to 400 cm-1 with a spectral resolution of 4 cm-1. The NIR spectra were obtained in the diffuse reflectance mode with the use of a rotation accessory which ensures high reproducibility for heterogeneous samples. The spectral results, FTIR and NIR, were treated statistically by principal component analysis (PCA) and hierarchical grouping analysis (HCA) using Pirouette software version 4.0. The spectra obtained by the spectroscopic, FTIR and NIR analyzes, it were possible to observe that, in general, poultry litter and animal food are similar. The use of the statistical tools, PCA and HCA, to the data of FTIR and NIR, allowed there is difference in the composition of the litter samples as a function of the lot, but the same was not observed for the animal food samples.