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Prediction of in vitro gas production parameters of concentrate feeds by near infra-red reflectance spectroscopy (NIRS)

Published online by Cambridge University Press:  20 November 2017

S. Fakhri ,
A. R. Moss ,
D.I. Givens  and
E. Owen
S. Fakhri
Affiliation:
ADAS Feed Evaluation and Nutritional Sciences, Drayton Manor Drive, Stratford upon-Avon, CV37 9RQ, UK Department of Agriculture, The University of Reading, Earley Gate, PO Box 236, Reading RG6 6AT, UK
A. R. Moss
Affiliation:
ADAS Feed Evaluation and Nutritional Sciences, Drayton Manor Drive, Stratford upon-Avon, CV37 9RQ, UK
D.I. Givens
Affiliation:
ADAS Feed Evaluation and Nutritional Sciences, Drayton Manor Drive, Stratford upon-Avon, CV37 9RQ, UK
E. Owen
Affiliation:
Department of Agriculture, The University of Reading, Earley Gate, PO Box 236, Reading RG6 6AT, UK
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Extract

Herrero et al. (1996) found that NIRS was able to calibrate and cross-validate the static values of gas produced from the incubation of Kikuyu grass using manual in vitro gas production. However, the fermentation kinetic coefficients were not calibrated satisfactorily by NIRS. The aim of this study was to investigate the potential of NIRS as a means of predicting fermentation and the France et al. (1993) model parameters obtained from the automated in vitro gas production experiments for a range of concentrate feeds.

Thirty-eight milled (1 mm) samples representing three typical concentrate feed types were scanned over the infra-red region covering 1100 to 2300 nm using an NIRS systems 6500 spectrometer. Optical data recorded as log 1/Reflectance were transformed to their standard normal variates and detrended values (SNV-D).

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 155
Copyright
Copyright © The British Society of Animal Science 1999

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References

Demeyer, D.I. 1991. Quantitative aspects of microbial metabolism in the rumen and hindgut. In. Jouany, J.P. (ed.), Rumen Microbial Metabolism and Ruminant Digestion (pp. 217–237). INRA edition, Paris.Google Scholar
Fakhri, S., Moss, A.R., Givens, D.I. and Owen, E. In press. Various in vitro gas production parameters as estimator for fermentable energy of concentrate feeds for ruminants.Google Scholar
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Herrero, M., Murray, I., Fawcett, R.H. and Dent, J.B. 1996. Prediction of in vitro gas production and chemical composition of Kikuyu grass by near-infrared reflectance spectroscopy. Anim. Feed. Sci. and Tech. 60:51–67.Google Scholar