Abstract

This study examined the possibility of transferring calibrations to predict ingredient inclusion percentages in intact compound feedstuffs. For standardisation purposes, the cloning algorithm proposed by Shenk and Westerhaus was used. Three different cloning sets were evaluated for the design of seven spectral correction files or cloning matrices. Six of these correction files, when applied to spectra obtained from the satellite instrument, yielded results similar to those obtained using the master instrument. Moreover, using a validation set (N = 15) to compare predicted values from unstandardised and standardised satellite spectra with master spectra using the same calibrations, the standard error of differences (SED) was greatly reduced with all six cloning matrices. This indicates the success of the tuning method for standardisation and transfer of ingredient composition prediction equations in compound feedstuffs analysed unground.

© 2006 NIR Publications

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