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Prediction of chemical composition of sugar beet pulp by near infrared
reflectance spectroscopy B. Fernándeza, S. Andrésb,c, N. Prietoa,*, A.R. Mantecóna,c
and F.J. Giráldeza,c
aEstación Agrícola Experimental (CSIC). Finca Marzanas, 24346 Grulleros, León, Spain. E-
mail: etcnpb00@estudiantes.unileon.es
bDepartamento de Producción Animal, Universidad de León, E-24071 León,
Spain
cUnidad Asociada al CSIC del Grupo de Nutrición-Praticultura del Departamento de Producción Animal de la Universidad de León
a través de la Estación Agrícola Experimental de León, Spain
ABSTRACT:
The feasibility of near infrared (NIR) reflectance spectroscopy to estimate the
chemical composition of dehydrated sugar beet pulp was examined in the present study. Seventy three samples from different processing plants were analysed for dry matter
(DM), crude protein (CP), neutral detergent fibre (NDF) and soluble (NDSF) fibre, according to the conventional chemical methods. The parameters predicted by NIR spectroscopy
with the highest accuracy were DM (R2 = 0.97; SECV = 5.69 g kg–1 FM) and CP (R2 = 0.90;
SECV = 3.81 g kg–1 DM) content. Furthermore, it was demonstrated that NIR technology can be used to discriminate samples of sugar
beet pulp manufactured by different chemical procedures.
Keywords: NIR spectroscopy, sugar beet pulp, chemical composition, discrimination
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