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Live-weight gains on leucaena and native grass pastures after dosing cattle with rumen bacteria capable of degrading DHP, a ruminal metabolite from leucaena

Published online by Cambridge University Press:  27 March 2009

M. F. Quirk
Affiliation:
Queensland Department of Primary Industries, ‘Brian Pastures’ Research Station, Gayndah, Queensland 4625, Australia
J. J. Bushell
Affiliation:
Queensland Department of Primary Industries, ‘Brian Pastures’ Research Station, Gayndah, Queensland 4625, Australia
R. J. Jones
Affiliation:
CSIRO Division of Tropical Crops and Pastures, Davies Laboratory, Townsville, Queensland 4814, Australia
R. G. Megarrity
Affiliation:
CSIRO Division of Tropical Crops and Pastures, Davies Laboratory, Townsville, Queensland 4814, Australia
K. L. Butler
Affiliation:
Queensland Department of Primary Industries, P.O. Box 6014, Rockhampton Mail Centre, Queensland 4702, Australia

Summary

The effect on live-weight gain from dosing cattle with rumen bacteria capable of degrading 3-hydroxy-4(l H)-pyridone (DHP) was measured on cattle grazing leucaena and native grass pastures in south-east Queensland. Dosing increased the growth rate of cattle grazing only leucaena pasture: from 0·52 kg/head per day when not dosed, to 1·03 kg/head per day when dosed, in the period 6·19 weeks after treatment. Dosing did not affect the growth rate of cattle either grazing leucaena with native pasture, or grazing only native pasture. The introduced bacteria spread naturally to untreated cattle after 19 weeks post-dosing.

The response to dosing occurred when untreated cattle grazing only leucaena pasture had high urinary concentrations of DHP (maximum 0·28%) and low concentrations of serum thyroxine (< 30 nmol/1). The results show that DHP-induced depressions in growth rate may occur in this environment when cattle graze mainly on leucaena-based pasture. Dosing with DHP-degrading bacteria will overcome this problem.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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References

Addison, K. B., Cameron, D. G. & Blight, G. W. (1984). Effect of leucaena and peanut meal supplements fed to steers grazing native pasture in sub coastal south-east Queensland. Tropical Grasslands 18, 121130.Google Scholar
Blunt, C. G. & Jones, R. J. (1977). Steer liveweight gains in relation to the proportion of time on Leucaena leucocephala pastures. Tropical Grasslands 11, 159164.Google Scholar
Cochran, W. G. & Cox, G. M. (1957), Experimental Designs, pp. 298299. New York: Wiley.Google Scholar
Elliot, R., Norton, B. W., Milton, J. T. B. & Ford, C. W. (1985). Effect of molasses on mimosine metabolism in goats fed fresh and dried leucaena with barley straw. Australian Journal of Agricultural Research 36, 867875.CrossRefGoogle Scholar
Hegarty, M. P., Lee, C. P., Christie, G. S., Court, R. D. & Haydock, K. P. (1979). The goitrogen 3-hydroxy-4(1H)-pyridone, a ruminal metabolite from Leucaena leucocephala: effects in mice and rats. Australian Journal of Biological Science 32, 2740.CrossRefGoogle ScholarPubMed
Jones, R. J., Blunt, C. G. & Holmes, J. H. G. (1976). Enlarged thyroid glands in cattle grazing leucaena pastures. Tropical Grasslands 10, 113116.Google Scholar
Jones, R. J. & Hegarty, M. P. (1984). The effect of different proportions of Leucaena leucocephala in the diet of cattle on growth, feed intake, thyroid function and urinary excretion of 3-hydroxy-4(lH)-pyridone. Australian Journal of Agricultural Research 35, 317325.CrossRefGoogle Scholar
Jones, R. M. & Jones, R. J. (1984). The effect of Leucaena leucocephala on liveweight gain, thyroid size and thyroxine levels of steers in south-eastern Queensland. Australian Journal of Experimental Agriculture and Animal Husbandry 24, 49.CrossRefGoogle Scholar
Jones, R. J. & Megarrity, R. G. (1983). Comparative toxicity responses of goats fed on Leucaena leucocephala in Australia and Hawaii. Australian Journal of Agricultural Research 34, 781790.Google Scholar
Jones, R. J. & Megarrity, R. G. (1986). Successful transfer of DHP-degrading bacteria from Hawaiian goats to Australian ruminants to overcome the toxicity of leucaena. Australian Veterinary Journal 63, 259262.CrossRefGoogle ScholarPubMed
Jones, R. J. & Winter, W. H. (1982). Serum thyroxine levels and liveweight gain of steers grazing leucaena pastures. Leucaena Research Reports 3, 2.Google Scholar
Lowry, J. B. (1983). Detoxification of leucaena by enzymic or microbial processes. In Leucaena Research in the Asian-Pacific Region: Processings of a Workshop held in Singapore, 23–26 11 1982, pp. 4954. Ottawa: International Development Research Centre.Google Scholar
Megarrity, R. G. (1978). An automated colorimetric method for mimosine in Leucaena leaves. Journal of the Science of Food and Agriculture 29, 182186.CrossRefGoogle ScholarPubMed
Megarrity, R. G. (1981). Rapid estimation of DHP in urine. Leucaena Research Reports 2, 16.Google Scholar
Northcote, K. H. (1979). A Factual Key for the Recognition of Australian Soils, 4th edition. Glenside, South Australia: Rellim Technical Publications.Google Scholar
Wildin, J. H. (1985). Leucaena – a permanent dry season forage in Australia. In Proceedings of the 15th International Grassland Congress, Kyoto, Japan, pp. 13011302.Google Scholar