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Effects of washing procedure and dilution ratio on the size of non-washout, insoluble washout, and soluble washout fractions in concentrate ingredients

Published online by Cambridge University Press:  23 November 2017

A. Azarfar ,
S. Tamminga  and
H. Boer
A. Azarfar*
Affiliation:
Wageningen University, Animal Nutrition Group, P. O. Box 338, 6700 AA Wageningen, The Netherlands
S. Tamminga
Affiliation:
Wageningen University, Animal Nutrition Group, P. O. Box 338, 6700 AA Wageningen, The Netherlands
H. Boer
Affiliation:
Wageningen University, Animal Nutrition Group, P. O. Box 338, 6700 AA Wageningen, The Netherlands
*
Email: Arash.Azarfar@wur.nl
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Extract

A widely adopted procedure to characterize degradation in the rumen is the in situ incubation technique (IS), that assumes the washout fraction of feeds (W) to be equal to the soluble (S) fraction and that both are rapidly and completely degraded which may not be the case. Because IS technique is unable to measure the rate at which the W fraction is actually degraded; therefore, alternative washing procedures need to be developed to recover and fractionate the W fraction. Recently, simple washing procedure have been developed at Lelystad (method M) (Melin et al, unpublished results) and at Wageningen (method AA, SM and Y) (Azarfar et al., 2004; Yang et al., unpublished results), by which the feeds can be fractionated in a non-washout (NWF), an insoluble washout (ISWF) and a soluble washout fraction (SWF). The aims of this study were: 1-To study the effect of different washing procedures on the size of NWF, ISWF and SWF in some concentrate ingredients. 2- To study the effect of different dilution ratios (5, 10, 20, 30 and 40) on the size of SWF, and soluble true protein (STP) in some concentrates ingredients.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2005 , 2005 , pp. 74
Copyright
Copyright © The British Society of Animal Science 2005

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References

Azarfar, A., Tamminga, S. and Boer, H. 2004. Effects of washing procedure, grain type and particle size on the size of non-washout and insoluble washout fractions in concentrate ingredients. Book of abstracts, EAAP- 55th annual meeting, Bled, 5-9 September 2004.Google Scholar