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In situ degradation of crude protein in physically processed barley, maize and peas in the caecum of ponies

Published online by Cambridge University Press:  20 November 2017

B M L McLean ,
J J Hyslop ,
A C Longland ,
D Cuddeford  and
T Hollands
B M L McLean
Affiliation:
Dept. Of Vet. Clinical Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian, EH25 9RG, UK
J J Hyslop
Affiliation:
Dept. Of Vet. Clinical Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian, EH25 9RG, UK
A C Longland
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, UK
D Cuddeford
Affiliation:
Dept. Of Vet. Clinical Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian, EH25 9RG, UK
T Hollands
Affiliation:
Dodson & Horrell Ltd, Ringstead, Kettering, Northamptonshire, NN14 4BX
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Extract

Little information is available on how physical processing of cereals affects crude protein (CP) degradation dynamics in equines. In two experiments the effects of two physical processing methods (micronisation and extrusion) on in situ degradation of CP in barley, maize and peas in the caecum of ponies were investigated.

In experiment 1, three caecally-fistulated mature Welsh-cross pony geldings (approx. LW 270kg) were used whilst two of these ponies were used in experiment 2. In both experiments ponies were offered ad libitum grass hay plus minerals. Incubation bags (monofilament polyester, 6.5 x 20cm, 41μm pores, 16mg/cm2 sample size) contained either unprocessed barley (UB), micronised barley (MB) or extruded barley (EB) (experiment 1) and either unprocessed maize (UM), micronised maize (MM), extruded maize (EM), unprocessed peas (UP), micronised peas (MP) or extruded peas (EP) (experiment 2).

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 135
Copyright
Copyright © The British Society of Animal Science 1999

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References

Ørskov, E.R. and McDonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science (Camb.) 92: 499–503.CrossRefGoogle Scholar