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New estimates of dry matter intake of lactating beef cows grazing three pasture systems

Published online by Cambridge University Press:  27 March 2009

R. Barlow ,
K. J. Ellis ,
D. J. McLennan ,
P. Costigan  and
P. H. Hirst
R. Barlow
Affiliation:
NSW Agriculture & Fisheries, Agricultural Research and Advisory Station, Grafton, NSW 2460, Australia
K. J. Ellis
Affiliation:
CSIRO, Division of Animal Production, Pastoral Research Laboratory, University of New England, Armidale, NSW 2351, Australia
D. J. McLennan
Affiliation:
NSW Agriculture & Fisheries, Agricultural Research and Advisory Station, Grafton, NSW 2460, Australia
P. Costigan
Affiliation:
CSIRO, Division of Animal Production, Pastoral Research Laboratory, University of New England, Armidale, NSW 2351, Australia
P. H. Hirst
Affiliation:
NSW Agriculture & Fisheries, Agricultural Research and Advisory Station, Grafton, NSW 2460, Australia
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Summary

Estimates of dry matter intake reported by Barlow el al. in this journal in 1988 appeared low for grazing beef cows during early lactation. Further estimates for 144 crossbred and Hereford cows at Grafton, NSW, support the contention that the previous estimates for early lactation were biased downward. This appears to have been simply a scale effect as rankings of pastures and cow genotypes remained unchanged, although the magnitude of differences did alter.

Type
Animals
Information
The Journal of Agricultural Science , Volume 115 , Issue 1 , August 1990 , pp. 117 - 119
Copyright
Copyright © Cambridge University Press 1990

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References

REFERENCES

Barlow, R., Ellis, K. J., Williamson, P. J., Costigan, P., Stephenson, P. D., Rose, G. & Mears, P. T. (1988). Drymatter intake of Hereford and first-cross cows measured by controlled release of chromic oxide on three pasture systems. Journal of Agricultural Science, Cambridge 110, 217–231.CrossRefGoogle Scholar
Ellis, K. J., Laby, R. H., Costigan, P., Zirkler, K. & Choice, P. G. (1982). Continuous administration of chromic oxide to grazing cattle. Proceedings of the Nutrition Society of Australia 7, 177.Google Scholar