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A note on the effect of monensin and amicloral in steer diets

Published online by Cambridge University Press:  02 September 2010

G. M. J. Horton
G. M. J. Horton
Affiliation:
University of Saskatchewan, Saskatoon, Canada
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Abstract

The effects of feeding monensin and amicloral at 33 and 1500 mg/kg of diet, respectively, were investigated in two experiments using 330-kg steers. Monensin and amicloral, either alone or in combination, increased the digestibility of organic matter and crude fibre compared with a control diet (P < 0·001). Crude protein digestibility was increased by monensin (P < 0·001). Use of monensin and amicloral, alone or in combination, increased molar proportions of propionic acid by 22% on average (P > 0·05), and monensin decreased butyric acid by 37% (P < 0·05).

Ruminal ammonia concentrations were lower in steers fed monensin (P < 0·05). Steers fed monensin consumed 6 % less feed, gained 9 % more weight (P < 0·05) and utilized feed 14% more efficiently (P < 0·05) than control animals. Amicloral, either alone or with monensin, lowered feed intake by 11 % (P < 0·05), had no effect on average daily gain and improved feed efficiency by about 12% (P < 0·05). There were no treatment effects on any of the carcass parameters.

Type
Research Article
Information
Animal Production , Volume 30 , Issue 3 , June 1980 , pp. 441 - 444
Copyright
Copyright © British Society of Animal Science 1980

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References

REFERENCES

Brethour, J. R. and Chalupa, W. V. 1977. Amicloral and monensin in high-roughage, cattle rations. J. Anim. Sci. 45, Suppl. 1: 222–223 (Abstr.).Google Scholar
Chalupa, W., Corbett, W. and Brethour, J. R. 1978. Manipulating rumen fermentation with monensin and amicloral. J. Anim. Sci. 47, Suppl. 1: 410 (Abstr.).Google Scholar
Cole, N. A. and McCroskey, J. E. 1975. Effects of hemiacetal of chloral and starch on the performance of beef steers. J. Anim. Sci. 41: 1735–1741.CrossRefGoogle Scholar
Dewan, J. G. 1938. The l(+)glutamic dehydrogenase of animal tissues. Biochem. J. 32: 1378–1385.CrossRefGoogle Scholar
Horton, G. M. J., Bassendowski, K. A. and Keeler, E. H. 1980. Digestion and metabolism in lambs and steers fed monensin with different levels of barley. J. Anim. Sci. In press.Google Scholar
Kellogo, D. W. 1969. Analysis of rumen fluid volatile fatty acids by chromatography with Porapak QS. J. Dairy Sci. 52: 1690–1692.CrossRefGoogle Scholar
Leibholz, Jane and Russell, C. L. 1978. Chaffed or ground straw and lucerne in the diet of the early-weaned calf. Anim. Prod. 27: 171–179.Google Scholar
Lemenager, R. P., Owens, F. N., Shockey, B. J., Lusby, K. S. and Totusek, R. 1978. Monensin effects on rumen turnover rate, twenty-four hour VFA pattern, nitrogen components and cellulose disappearance. J. Anim. Sci. 47: 255–261.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
Rust, S. R., Owens, F. N., Thornton, J. H. and Fent, R. W. 1978. Monensin and digestibility of feedlot rations. J. Anim. Sci. 47, Suppl. 1: 437 (Abstr.).Google Scholar
Slyter, L. L., Satter, L. D. and Dinius, D. A. 1979. Effect of ruminal ammonia concentration on nitrogen utilization by steers. J. Anim. Sci. 48: 906–912.CrossRefGoogle Scholar
Snedecor, G. W. and Cochran, W. G. 1967. Statistical Methods. 6th ed.Iowa State University Press, Ames, la.Google Scholar
Trei, J. E. and Scott, G. C. 1971. Performance of steers on the methane inhibitor—HCS. J. Anim. Sci. 33: 301–302 (Abstr.).Google Scholar
Trei, J. E., Scott, G. C. and Parish, R. C. 1972. Influence of methane inhibition on energetic efficiency of lambs. J. Anim. Sci. 34: 510–515.CrossRefGoogle ScholarPubMed
Van Nevel, C. J. and Demeyer, D. I. 1977. Effect of Monensin on rumen metabolism in vitro. Appl. Environ. Microbiol. 34: 251–257.CrossRefGoogle ScholarPubMed