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The effect of freezing and thawing fresh grass silage on near infrared reflectance spectroscopy (NIRS) predictions

Published online by Cambridge University Press:  20 November 2017

R. S. Park ,
R. E. Agnew  and
D. J. Kilpatrick
R. S. Park
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR, U.K.
R. E. Agnew
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR, U.K.
D. J. Kilpatrick
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR, U.K.
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Extract

The accurate analysis of forage is paramount if the nutritive value to the ruminant animal is to be estimated. NIRS has the potential to accurately and rapidly evaluate the chemical and biological parameters of fresh silage. In many laboratory situations the pressure of proximate and specialized chemical analyses means that routinely, fresh forages have to be stored frozen (–20°C) before analysis. Research by MacRae et al., (1975) has shown that although the physico-chemical composition of high quality forages changed upon freezing and subsequent thawing there were no differences in the apparent digestibilities and total nitrogen remained relatively constant. The objective of this study was to examine the effect of freezing and thawing fresh silage on NIRS predictions.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 91
Copyright
Copyright © The British Society of Animal Science 2001

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References

MacRae, J.C., Campbell, D. R. and Eadie, J. 1975. Changes in the biochemical composition of herbage upon freezing and thawing. Journal of Agricultural Science Cambridge. 84: 125–131.CrossRefGoogle Scholar
Park, R.S., Agnew, R.E. and Barnes, R. J. 1999. The development of near infrared reflectance spectroscopy calibrations for undried grass silage and their transfer to another instrument using multiple and single sample standardization. Journal of Near Infrared Spectroscopy. 7: 117–131.Google Scholar