Skip to main content Accessibility help
×
Home

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon the tissue growth and body composition of store lambs

  • M. A. Kossaibati (a1) and M. J. Bryant (a1)

Abstract

Thirty-six individually penned lambs (mean live weight 32·4 (s.d. 2·27) kg) were offered maize silage ad libitum and one of three concentrate mixes, two of which contained extracted rapeseed meal (control and HR) and the other fish meal (FM). The concentrates were given according to live weight and in sufficient quantities to provide proportionately about 0·4 of the dry matter (DM) intake of the lambs. The dietary concentrations of the nitrogen (N) g/kg DM were 22·4, 27·4 and 27·5 and of the rumen undegradable N 6·6, 7·3 and 11·6 for the control, HR and FM diets, respectively. All lambs were slaughtered at 45 kg live weight and chemical composition of the empty body and some of the component parts determined. A further 12 lambs were slaughtered at the beginning of the experiment to establish body composition before the dietary treatments were imposed.

The HR lambs had lower fleece.free empty body (FFEB) gains than either control or FM lambs (P < 0·05). This reduced gain of HR lambs was particularly associated with a reduction in fat deposition (P < 0·01) such that the FFEBs contained less fat than control and FM lambs (P < 0·01). The efficiency of conversion of metabolizable energy for growth (kg) was worse than both the control (P < 0·01) and the FM (P < 0·001) diets. The FFEBs of HR lambs also contained more ash (P < 0·05) than the lambs receiving the other diets.

The FM diet was associated with greater gains of fat and energy in the guts compared with the control diet (P < 0·05) and FM lambs had a better kg, value than control lambs (P < 0·05). There was no evidence that FM lambs had better N retention than lambs on the other two treatments.

Copyright

References

Hide All
Agricultural Research Council. 1980. The nutrient requirements of ruminant livestock. Commonwealth Agricultural Bureaux, Slough.
Agricultural Research Council. 1984. The nutrient requirements of ruminant livestock. Supplement no. 1. Commonwealth Agricultural Bureaux, Slough.
Beermann, D. H., Hogue, D. E., Fishell, V. K., Dalrymple, R. H. and Ricks, C. A. 1986. Effects of cimaterol and fish meal on performance, carcass characteristics and skeletal muscle growth in lambs. journal of Animal Science 62: 370380.
Chernausek, S. D., Underwood, L. E., Utiger, R. D. and Van Wyk, J. J. 1983. Growth hormone secretion and plasma somatomedin-C in primary hypothyroidism. Clinical Endocrinology 19: 337344.
Cottrill, B. R., Beever, D. E., Austin, A. R. and Osbourn, D. F. 1982. The effect of protein nitrogen and non-protein nitrogen supplements to maize silage on total amino acid supply in young cattle. British Journal of Nutrition 48: 527541.
Dayton, W. R. and Hathaway, M. R. 1991. Control of animal growth by glucocorticoids, thyroid hormones, autocrine and/or paracrine growth factors. In Growth regulation in farm animals (ed. Pearson, A. M. and Dutson, T. R.), pp. 1745. Elsevier Science, London.
Hassan, S. A. and Bryant, M. J. 1986. The response of store lambs to protein supplementation of a roughage-based diet. Animal Production 42: 7379.
Hill, R., Vincent, I. C. and Thompson, J. 1990. The voluntary feed intake and weight gain of lambs given a range of glucosinolate contents. Animal Production 50: 587A (abstr.).
Hovell, F. D. DeB. and Ørskov, E. R. 1989. The rôle of fish meal in rations for sheep. International Association of Fish Meal Manufacturers, report no. 23.
Kossaibati, M. A. 1987. The effects of nitrogen source on the growth rate and feed intake of store lambs fed maize silage diets. M.Sc. Thesis, University of Reading.
Kossaibati, M. A. and Bryant, M. J. 1994. Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon voluntary intake, live-weight gain and wool growth of store lambs. Animal Production. 58: 4956.
Legrand, J. 1986. Thyroid hormone effects on growth and development. In Thyroid hormone metabolism (ed. Hennemann, G.), pp. 503534. Marcel Dekker, New York.
MacRae, J. C. and Lobley, G. E. 1982. Some factors which influence thermal energy losses during the metabolism of ruminants. Livestock Production Science 9: 447456.
Ørskov, E. R., McDonald, I., Grubb, D. A. and Pennie, K. 1976. The nutrition of the early weaned lambs. The effect on growth rate, food utilization and body composition of changing from a low to a high protein diet. Journal of Agricultural Science, Cambridge 86: 411423.
Pusztai, A. 1989. Antinutrients in rapeseeds. Nutrition Abstracts and Reviews Series, B. Livestock Feeds and Feeding 59: 427433.
Yilala, K. and Bryant, M. J. 1985. The effects upon the intake and performance of store lambs of supplementing grass silage with barley, fish meal and rapeseed meal. Animal Production 40: 111121.

Keywords

Related content

Powered by UNSILO

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon the tissue growth and body composition of store lambs

  • M. A. Kossaibati (a1) and M. J. Bryant (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.