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A note on the effects of monensin on the performance and on rumen metabolites of intact male cattle†

Published online by Cambridge University Press:  02 September 2010

Z. Holzer ,
D. Ilan  and
D. Levy
Z. Holzer
Affiliation:
Agricultural Research Organization, and Ministry of Agriculture Extension Service, Israel
D. Ilan
Affiliation:
Agricultural Research Organization, and Ministry of Agriculture Extension Service, Israel
D. Levy
Affiliation:
Agricultural Research Organization, and Ministry of Agriculture Extension Service, Israel
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Abstract

Two groups of 14 intact male weanling beef breed calves were each fed 1·45 kg oat hay daily and concentrates ad libitum, in a 158-day feeding trial. Group ‘a’ received 35 p.p.m. monensin in the concentrate. Group ‘b’ served as a control.

Average daily gain was 1·28 and 1·27 kg, dressing percentage was 58·1 and 58·0, daily intake of concentrate was 8·10 and 8·79 kg and conversion ratio of metabolizable energy into live weight was 74·53 and 81·30 MJ/kg for the monensin and the control group respectively. The percentage of acetic acid in rumen liquor was reduced and that of propionic acid increased very markedly. As a result the acetic acid: propionic acid ratio was reduced from 3·2 in the control group to 1·8 in the monensin group. No peculiarity in the response of intact male cattle to monensin was observed.

Type
Research Article
Information
Animal Production , Volume 28 , Issue 1 , February 1979 , pp. 135 - 137
Copyright
Copyright © British Society of Animal Science 1979

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References

REFERENCES

Boling, J. A., Bradley, N. W. and Campbell, L. D. 1977. Monensin levels for growing and finishing steers. J. Anim. Sci. 44: 867–871.CrossRefGoogle Scholar
Brown, H., Carroll, L. H., Elliston, N. G., Grueter, H. P., McAskill, J. W., Olson, R. D. and Rathmacher, R. P. 1974. Field evaluation of monensin for improving feed efficiency in feedlot cattle. J. Anim. Sci. 38: 1340. (Abstr.)Google Scholar
Cottyn, G. C. and Boucque, C. V. 1968. Rapid method for the gas chromatographic determination of volatile fatty acids in rumen fluid. J. agric. Fd. Chem. 16: 105–107.CrossRefGoogle Scholar
Dinius, D. A., Simpson, M. E. and Marsh, P. B. 1976. Effect of monensin fed with forage on digestion and the ruminal ecosystem of steers. J. Anim. Sci. 42: 229–234.CrossRefGoogle Scholar
Embry, L. B. and Swan, W. S. 1974. Effect of monensin on feedlot performance of growing and finishing steers. S. Dakota State Univ. A.S. Series: 74–5.Google Scholar
Holzer, Z., Tagari, H., Levy, D. and Volcani, R. 1976. Soaking of complete fattening rations high in poor roughage. 2. The effect of moisture content and of particle size of the roughage component on the performance of male cattle. Anim. Prod. 22: 41–53.Google Scholar
Linn, J. G., Goodrich, R. D. and Meiske, J. C. 1976. Evaluation of monensin for growing and finishing steers. J. Anim. Sci. 42: 1368. (Abstr.)Google Scholar
Potter, E. L., Raun, A. P., Cooley, C. O., Rathmacher, R. P. and Richardson, L. F. 1976. Effect of monensin on carcass characteristics, carcass composition and efficiency of converting feed to carcass. J. Anim. Sci. 43: 678–683.CrossRefGoogle Scholar
Raun, A. P., Cooley, C. O., Potter, E. L., Rathmacher, R. P. and Richardson, L. F. 1976. Effect of monensin on feed efficiency of feedlot cattle. J. Anim. Sci. 43: 670–677.CrossRefGoogle Scholar
Richardson, L. F., Raun, A. P., Potter, E. L., Cooley, C. O. and Rathmacher, R. P. 1976. Effect of monensin on rumen fermentation in vitro and in vivo. J. Anim. Sci. 43: 657–664.CrossRefGoogle Scholar