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The use of fish meal and monensin as supplements to grass silage and their effect on body composition changes in steers from 5 months of age to slaughter

Published online by Cambridge University Press:  02 September 2010

M. J. Gibb  and
R. D. Baker
M. J. Gibb
Affiliation:
AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead SL6 5LR
R. D. Baker
Affiliation:
AFRC Institute of Grassland and Environmental Research, Hurley, Maidenhead SL6 5LR
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Abstract

Fish meal and monensin, as supplements to grass silage, were offered either separately or together to Friesian steers from 5 to 9 months of age (period 1). At 9 months, six steers from each of the supplemented treatments were slaughtered to determine body composition. Of the remaining steers, from 9 months of age to slaughter at 490 kg live weight (LW) (period 2), six continued on each of the same treatments, whilst six received silage unsupplemented. A further group of six steers which had received fish meal and monensin during period 1, received monensin only as a supplement to their silage.

During period 1 fish-meal supplementation increased LW, empty body and carcass weight gains, and tissues gains, while monensin had no apparent effect. During period 2, continued supplementation with both fish meal and monensin significantly increased LW, empty body and carcass gains compared with the continuously unsupplemented steers, whilst fish meal and monensin separately produced intermediate increased gains. All three supplement regimes significantly reduced the time taken to reach slaughter.

The only significant effect on body composition was that steers receiving fish meal and monensin had a higher crude protein concentration in the empty body than those receiving only fish meal as a supplement. They also had the highest crude protein concentration in the carcass, although this was not significant. Steers which had their supplements withdrawn after 9 months of age generally maintained gains intermediate between those continuing to receive supplements and those steers unsupplemented throughout. Only those not continuing to receive fish meal and monensin together appeared to perform appreciably worse. Nevertheless, although time taken to reach slaughter from 4 months of age varied by as much as 96 days, there were no other significant differences in body or carcass composition, hi terms of cost effectiveness, use of monensin showed distinct advantages over fish meal.

Keywords

body compositionfish mealgrass silagemonensinsteers
Type
Research Article
Information
Animal Production , Volume 55 , Issue 1 , August 1992 , pp. 47 - 57
Copyright
Copyright © British Society of Animal Science 1992

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References

Agricultural Research Council. 1980. The nutrient requirements of ruminant livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Baker, R. D., Young, N. E. and Laws, J. A. 1985. Changes in the body composition of cattle exhibiting compensatory growth and the modifying effects of grazing management. Animal Production 41: 309–321.Google Scholar
Baker, R. D., Young, N. E. and Laws, J. A. 1992. The effect of diet in winter on the body composition of young steers and subsequent performance during the grazing season. Animal Production 54: 211–219.Google Scholar
Beever, D. E. 1980. The utilization of protein in conserved forage. In Forage conservation in the 80's (ed. Thomas, C.), Proceedings of European Grassland Federation Meeting, Brighton, pp. 131–143.Google Scholar
Blaxter, K. L., Clapperton, J. L. and Wainman, F. W. 1966. Utilization of the energy and protein of the same diet by cattle of different ages. Journal of Agricultural Science, Cambridge 67: 67–75.CrossRefGoogle Scholar
Bradstreet, R. B. 1969. The Kjeldnhl method for organic nitrogen. Academic Press, New York.Google Scholar
Dinius, D. A., Simpson, M. E. and Marsh, P. B. 1976. Effect of monensin fed with forage on digestion and the rumenal ecosystem of steers. Journal of Animal Science 42: 229–234.CrossRefGoogle Scholar
Federer, W. T. 1955. Experimental design, pp. 21–26. Macmillan, New York.Google Scholar
Gibb, M. J. and Baker, R. D. 1987. Performance of young steers offered silage or thermo-ammoniated hay with or without a fish-meal supplement. Animal Production 45: 371–381.Google Scholar
Gibb, M. J. and Baker, R. D. 1991. Compensatory growth and body composition changes in grazing steers following silage feeding without or with a supplement of fish meal and monensin. Animnl Production 52: 237–247.Google Scholar
Gill, M., Beever, D. E., Buttery, P. J., England, P., Gibb, M. J. and Baker, R. D. 1987. The effect of oestradiol-17β implantation on the response in voluntary intake, live- weight gain and body composition, to fishmeal supplementation and silage offered to growing calves. joiinml of Agricultural Science, Cambridge 108: 9–16.CrossRefGoogle Scholar
Lonsdale, C. R. 1976. The effect of season of harvest on the utilization by young cattle of dried grass given alone or as a supplement to grass silage. Ph.D thesis, University of Rending.Google Scholar
McCarriek, R. B. 1967. The growth and body composition of beef cattle fed conserved fodders. In Fodder conservation (ed. Wilkins, R. J.), occasional symposium, British Grassland Society, no, 3, pp. 121–129.Google Scholar
Pettinati, J. D. and Swift, C. E. 1975. Rapid determination of fat in meat and meat products by Foss-Let solvent extraction and density measurement, journal of the Association of Official Analytical Chemists 58:1182–1187.Google Scholar
Pettinati, J. D. and Swift, C. E. 1977. Collaborative study of accuracy and precision of rapid determination of fat in meat and meat products by Foss-Let method. Journal of the Association of Official Analytical Chemists 60: 853–858.Google Scholar
Pike, I. H. (undated). UK trials to evaluate fish meal for beef cattle. International Association of Fish Meal Manufacturers.Google Scholar
Potter, E. L., Wray, M. I., Muller, R. D., Grueter, H. P., McAskill, J. and Young, D. C. 1985. Effect of monensin and tylosin on average daily gain, feed efficiency and liver abscess incidence in feedlot cattle, journal of Animnl Science 61:1058–1065.CrossRefGoogle ScholarPubMed
Prange, R. W., Davis, C. L. and Clark, J. H. 1978. Propionate production in the rumen of Holstein steers fed either a control or monensin supplemented diet. Journal of Animal Science 46:1120–1124.CrossRefGoogle Scholar
Steel, R. G. D. and Torrie, J. H. 1980. Principles and procedures of statistics: a biometrical approach. 2nd ed. McGraw-Hill Kogakusha, Tokyo.Google Scholar
Thomas, P. C. 1982. Utilization of conserved forages. In Forage protein in ruminant animal production (ed. Thomson, D. J., Beever, D. E. and Gunn, R. G.), occasional publication, British Society of Animal Production, no. 6, pp. 67–76.Google Scholar
Wakita, M., Kobayashi, Y., Hoshino, S., Kitabayashi, Y., Hashimuru, M. and Kudo, H. 1987. Effects of salinomycin and monensin on feed conversion of concentrate and ruminal fluid characteristics in fattening Holstein steers. Japanese Journal of Zootechnology and Science 58:396–402.Google Scholar