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Effect of physical processing on in situ degradation of 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

Maize and peas that have undergone physical processing are used routinely in cereal mixes for equines. However, little information is available on how physical processing of maize and peas affects degradation dynamics in equines. This experiment examines the effect of two physical processing methods (micronisation and extrusion) on in situ degradation of maize and peas in the caecum of ponies

Two caecally-fistulated mature Welsh-cross pony geldings (approx. LW 270kg) were offered ad libitum grass hay plus minerals. Incubation bags (monofilament polyester 6.5 x 20cm, 41? m pores, 16mg/cm2 sample size) containing either unprocessed maize (UM), micronised maize (MM), extruded maize (EM), unprocessed peas (UP), micronised peas (MP) or extruded peas (EP) were incubated in the caecum for fixed times according to both a forward (0, 2, 4, 6, 12, 8, 24, 48h) and reverse (48, 24, 8, 4, 12, 6, 2, 0h) incubation sequence. For each feedstuff residues from each time were bulked within pony and across incubation sequence for subsequent analysis of dry matter (DM) and starch (STC).

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1999 , 1999 , pp. 134
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