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The particle size distribution in colombian rice polishings and its effect on gas production by rumen micro-organisms in vitro

Published online by Cambridge University Press:  24 November 2017

D. Cardenas Garcia ,
H. Galbraith ,
C.J. Newbold  and
J.A. Rooke
D. Cardenas Garcia
Affiliation:
University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD
H. Galbraith
Affiliation:
University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD
C.J. Newbold
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
J.A. Rooke
Affiliation:
Scottish Agricultural College, 581 King Street, Aberdeen, AB9 1UD
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Extract

Rice polishings (RP) which are produced as a by-product during the pearling of hulled rice have been successfully used as a supplementary food for ruminants. However, information on the effects of feeding RP on rumen fermentation is contradictory. Valdez et al. (1977) found RP had little effect on rumen fermentation in bulls and suggested that the stimulation in growth rate observed, with RP may be mediated by the provision of nutrients postruminally. In contrast, Cardenas et al. (1992) reported that RP stimulated volatile fatty acid concentrations and microbial numbers when added to a rumen simulating fermentor (Rusitec). One reason for these differences might be that changes in the milling process, used to produce RP, have resulted in a by-product with different physical characteristics to that used in earlier studies. The experiment described here was designed to investigate the particle size distribution in Colombian rice polishings and the effect of these fractions on the rumen fermentation in vitro.

Type
Tropical Forages
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1993: Winter meeting , March 1993 , pp. 202
Copyright
Copyright © The British Society of Animal Production 1993

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References

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