Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-27T21:49:06.843Z Has data issue: false hasContentIssue false
  • English
  • Français

The response of store lambs to dietary supplements of fish meal 1. Effects of forage-to-concentrate ratio

Published online by Cambridge University Press:  02 September 2010

S. A. Hassan  and
M. J. Bryant
S. A. Hassan
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading RG6 2AT
M. J. Bryant
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading RG6 2AT
Get access

Abstract

Forty-eight individually-penned lambs (mean live weight 31-4 kg) were offered one of four diets, to investigate response to a supplement of fish meal (0 and 100 g dry matter (DM) per kg M) given with diets of either 60: 40 or 40: 60 forage-to-concentrate ratio. Nitrogen (N) degradability in the rumen and fractional outflow rates of protein supplements were determined. The diets were formulated such that the lambs received about 3 or 9 g undegradable rumen N per kg DM. The diets were given daily to provide sufficient metabolizable energy for maintenance and 150 g gain, and were adjusted according to live weight at weekly intervals.

Fish-meal supplementation improved daily growth over a 49-day period (P < 0·001) and enhanced N retention (P < 0·001). Live-weight gain was also marginally improved on the high-forage diets. (P < 0-05), but there was no protein supplement × forage-to-concentrate ratio interaction. Apparent digestibility of acid detergent fibre was improved by the fish-meal supplement on the high-concentrate diet.

The four diets were also given to rumen-fistulated sheep. The high-concentrate diet was associated with a higher molar proportion of propionate (P < 0·05) and a lower proportion of acetate (P < 0·001). Rumen concentrations of ammonia tended to be maintained at higher levels throughout the day by the fish-meal supplement.

Type
Research Article
Information
Animal Production , Volume 42 , Issue 2 , April 1986 , pp. 223 - 232
Copyright
Copyright © British Society of Animal Science 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Abidin, Z. and Kempton, T. J. 1981. Effects of treatment of barley straw with anhydrous ammonia and supplementation with heat-treated protein meals on feed intake and liveweight performance of growing lambs. Anim. Feed Sci. Tech. 6: 145–155.Google Scholar
Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Agricultural Research Council. 1984. The Nutrient Requirements of Ruminant Livestock. Suppl. No. 1. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Allen, Sarah A. and Miller, E. L. 1976. Determination of nitrogen requirement for microbial growth from the effect of urea supplementation of a low N diet on abomasal N flow and N recycling in wethers and lambs. Br. J. Nutr. 36: 353–368.CrossRefGoogle Scholar
Burrows, J. A., Heerdt, J. C. and Willis, J. B. 1965. Determination of wear metals in used lubricating oils by atomic absorption spectrometry. Analyt. Chem. 37: 579–582.Google Scholar
Cottrill, B. R., Beever, D. E., Austin, A. R. and Osbourn, D. F. 1982. The effect of protein- and nonprotein- nitrogen supplements to maize silage on total amino acid supply in young cattle. Br. J. Nutr. 48: 527–541.CrossRefGoogle Scholar
Elimam, M. E. and Ørskov, E. R. 1984. Estimation of rates of outflow of protein supplement from the rumen by determining the rate of excretion of chromiumtreated protein supplements in faeces. Anim. Prod. 39: 77–80.Google Scholar
Eno, K. S., Riewe, M. E., Craig, J. H. and Smith, J. C. 1964. Rate of passage of concentrate and roughage through the digestive tract of sheep. J. Anim. Sci. 23: 1129–1132.Google Scholar
Grovum, W. L. and Williams, V. J. 1973. Rate of passage of digesta in sheep. 4. Passage of marker through the alimentary tract and the biological relevance of rate-constants derived from the changes in concentration of marker in faeces. Br. J. Nutr. 30: 313–329.CrossRefGoogle ScholarPubMed
Hassan, S. A. and Bryant, M. J. 1986. The response of store lambs to protein supplementation of a roughage-based diet. Anim. Prod. 42: 73–79.Google Scholar
Hespell, R. B. and Bryant, M. P. 1979. Efficiency of rumen microbial growth: influence of some theoretical and experimental factors on YATP. J. Anim. Sci. 49: 1640–1659.Google Scholar
Hovell, F. D. DeB., Ørskov, E. R., Grubb, D. A. and Macleod, N. A. 1983. Basal urinary nitrogen excretion and growth response to supplemental protein by lambs close to energy equilibrium. Br. J. Nutr. 50: 173–187.CrossRefGoogle ScholarPubMed
Kempton, T. J. and Leng, R. A. 1979. Protein nutrition of growing lambs. 1. Responses in growth and rumen function to supplementation of a low-protein-cellulosic diet with either urea, casein or formaldehyde-treated casein. Br. J. Nutr. 42: 289–302.Google Scholar
Mcallan, A. B. and Smith, R. H. 1984. The efficiency of microbial protein synthesis in the rumen and the degradability of feed nitrogen between the mouth and abomasum in steers given different diets. Br. J. Nutr. 51: 77–83.Google Scholar
Macrae, J. C. and Lobley, G. E. 1982. Some factors which influence thermal energy losses during the metabolism of ruminants. Livest. Prod. Sci. 9: 447–456.Google Scholar
Marchment, Susan M. and Miller, E. L. 1983. The response of store lambs to protein supplementation of a low quality diet. Anim. Prod. 36: 508 (Abstr.).Google Scholar
Mehrez, A. Z. and Ørskov, E. R. 1977. A study of the artificial fibre bag technique for determining the digestibility of feeds in the rumen. J. agric. Sci., Camb. 88: 645–650.CrossRefGoogle Scholar
Merry, R. J., Smith, R. H. and Mcallan, A. B. 1984. Effect of different dietary nitrogen supplements on rumen fermentation. Can. J. Anim. Sci. 64: Suppl., pp. 56–57.CrossRefGoogle Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1975. Energy allowances and feeding systems for ruminants. Tech. Bull. 33. Her Majesty's Stationery Office, London.Google Scholar
Ørskov, E. R. and Mcdonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. J. agric. Sci., Camb. 92: 499–503.CrossRefGoogle Scholar
Satter, L. D. and Roffler, R. E. 1981. Influence of nitrogen and carbohydrate inputs on rumen fermentation. In Recent Developments in Ruminant Nutrition (ed. Haresign, W. and Cole, D. J. A.), pp. 115–139. Butterworth, London.Google Scholar
Smith, T., Broster, Valerie J. and Hill, R. E. 1980. A comparison of sources of supplementary nitrogen for young cattle receiving fibre-rich diets. J. agric. Sci., Camb. 95: 687–695.Google Scholar
Uden, P., Colucci, P. E. and Van Soest, P. J. 1980. Investigation of chromium, cerium and cobalt as markers in digesta. Rate of passage studies. J. Sci. Fd Agric. 31: 625–632.CrossRefGoogle ScholarPubMed
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. Anim. Prod. 40: 111–121.Google Scholar