Instrumentação de espectroscopia no infravermelho próximo para previsão bromatológica do farelo de trigo

Abstract

Wheat bran samples were collected during 12 months in the Brazilian states (Ceará, Paraíba and Rio Grande do Sul) and sent to Embrapa Caprinos e Ovinos, for analytical procedures. The samples received (300 copies) were destined to a first spectral reading in an NIR Perten instrument. Within this reading, 107 samples were selected, classified as (in natura samples read in NIR Perten). Then, the reference analyzes were carried out simultaneously with a second reading again in a NIR Perten instrument, classified as (dry and ground samples read in NIR Perten) and a third reading, in a NIR FOSS instrument, classified as (dry and ground samples read in NIR FOSS). Models for crude protein (CP) and in vitro digestibility of dry matter (IVDMD) and organic matter (IVOMD) were developed for both instruments with the three spectral readings performed. NIR instrumentation, associated with chemometric techniques, accurately predicted crude protein, in vitro dry matter digestibility and in vitro organic matter digestibility of wheat bran.