spectroscopy (NIRS) is used in the petfood industry for rapid assessment of
several macronutrients and gross energy (GE) content, but there is little
published data regarding its usefulness for GE and GE digestibility (GED)
evaluation of commercial dog food.
the NIRS spectra of 71 commercial extruded dog foods and reference values
determined by calorimetry and in vivo
feeding trials, chemometric models were developed for GE, GED and digestible
energy (DE) prediction. The SE and R2 of cross-validation were 0.30 MJ/kg DM
and 0.93 for GE, 2.10% and 0.82 for GED and 0.53 MJ/kg DM and 0.92 for DE.
results indicated that NIRS provides GE, GED and DE estimation values for dog
food with an accuracy similar to that of the 2006 Nutrient Research Council
proposed equations for use in petfood. This technology is a fast and accurate
method for predicting energy content in commercial extruded dog food and is a
useful and reliable technology to be used by the petfood industry when a wide
enough calibration set is available.
Source: M. Hervera et al., 2012. The use of near-infrared
spectroscopy to predict energy content of commercial dog food. J Anim Sci online October 2012. doi: 10.2527/jas.2012-5106J
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