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Predicting the apparent disappearance of starch in the rumen of cows from the in vitro gas production profile of their diet

Published online by Cambridge University Press:  20 November 2017

C. Rymer  and
D.I. Givens
C. Rymer
Affiliation:
ADAS Feed Evaluation and Nutritional Sciences, Drayton, Alcester Road, Stratford-on-Avon, CV37 9RQ, UK
D.I. Givens
Affiliation:
ADAS Feed Evaluation and Nutritional Sciences, Drayton, Alcester Road, Stratford-on-Avon, CV37 9RQ, UK
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Extract

Assessing the availability of a feed in the rumen is an important element of its characterisation. In the Metabolisable Protein system, it is assumed that all starch is available in the rumen, although clearly this is not the case. However, estimating the amount of starch that is apparently fermented in the rumen is difficult, expensive and cannot be routinely undertaken. The objective of this experiment was to determine whether the in vitro gas production technique could be used as a means of predicting the amount of starch that apparently disappears in the rumen (STA ADR).

Four Holstein cows, each fitted with a rumen and duodenal cannula, were used. They were fed one of four diets in a 4x4 latin square design. The diets consisted of grass silage (GS), molassed sugarbeet feed (MSBF), fishmeal (FM) and minerals (MIN). They were also supplemented with either wheat (WHT) or maize (MZE).

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 157
Copyright
Copyright © The British Society of Animal Science 1999

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References

Groot, J.C.J., Cone, J.W., Williams, B.A., Debersaques, F.M.A. and Lantinga, E.A. (1996) Multiphasic analysis of gas production kinetics for in vitro fermentation of ruminant feeds. Animal Feed Science and Technology. 64:77–89.CrossRefGoogle Scholar
Huntington, J.A., Rymer, C. and Givens, D.I. (1998) The effect of host diet on the gas production profile of hay and high temperature dried grass. Animal Science 67:59–64.CrossRefGoogle Scholar