Skip to main content Accessibility help
×
Home

A note on the response of store lambs to iso-nitrogenous diets containing rapeseed meal or fish meal

  • P. V. Tan (a1) and M. J. Bryant (a1)

Abstract

Live-weight gain responses were investigated using 36 individually penned lambs (mean live weight 35·2 kg) given three sodium hydroxide treated straw-based diets: low-protein, low-rapeseed meal (control) diet; high protein, high-rapeseed meal (HR) diet; or high-protein, fish meal (FM) diet. The diets were formulated to provide 3 or 9 g undegradable nitrogen per kg dry matter (DM) respectively for the diets without or with fish meal. Diets were offered once a day in a 50: 50 forage-to-concentrate ratio in amounts calculated to support maintenance plus 150 g gain and were adjusted weekly according to live weight. Live-weight gain, measured for 7 weeks, was improved by the FM diet only (P < 0·05).

The three diets were given also to rumen-fistulated sheep. The FM diet maintained higher rumen ammonia concentrations during most of the day. The FM and HR diets reduced rumen solid particle outflow rate (P < 0·05) and increased the effective degradability of DM and acid-detergent fibre.

Copyright

References

Hide All
Burrows, J. A., Heerdt, J. C. and Willis, J. B. 1965. Determination of wear metals in used lubricating oils by atomic absorption spectrometry. Analytical Chemistry 37: 579582.
Gorosit, A. R., Russell, J. B. and Van Soest, P. J. 1985. Effect of carbon-4 and carbon-5 volatile fatty acids on digestion of plant cell walls in vitro. Journal of Dairy Science 68: 840847.
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. British Journal of Nutrition 30: 313329.
Hassan, S. A. and Bryant, M. J. 1986a. The response of store lambs to protein supplementation of a roughage-based diet. Animal Production 42: 7379.
Hassan, S. A. and Bryant, M. J. 1986b. The response of store lambs to dietary supplements of fish meal. 1. Effects of forage-to-concentrate ratio. Animal Production 42: 223232.
Hassan, S. A. and Bryant, M. J. 1986c. The response of store lambs to dietary supplements of fish meal. 2. Effects of level of feeding. Animal Production 42: 233240.
Hume, I. D. 1970. Synthesis of microbial protein in the rumen. II. A response to higher volatile fatty acids. Australian Journal of Agricultural Research 21: 297304.
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. Journal of Agricultural Science, Cambridge 88: 645650.
Mercer, J. R., Allen, S. A. and Miller, E. L. 1980. Rumen bacterial protein synthesis and the proportion of dietary protein escaping degradation in the rumen of sheep. British Journal of Nutrition 43: 421433.
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1984. Energy allowances and feeding systems for ruminants. Reference Book 433. Her Majesty's Stationery Office, London.
Newbold, J. R., Garnsworthy, P. C., Buttery, P. J., Cole, D. J. A. and Haresign, W. 1987. Protein nutrition of growing cattle: food intake and growth responses to rumen degradable protein and undegradable protein. Animal Production 45: 383394.
Ørskov, E. R. and McDonald, I. 1979. The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science, Cambridge 92: 499503.
Satter, L. D. and Slyter, L. L. 1974. Effect of ammonia concentration on rumen microbial protein production in vitro. British Journal of Nutrition 32: 199208.
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. 115139. Butterworth, London.
Tayer, S. R. and Bryant, M. J. 1988. The response of store lambs to dietary supplements of fish meal. 3. Effect of the preceding pattern of growth. Animal Production 47: 393399.
Udén, P., Colucci, P. E. and Van Soest, P. J. 1980. Investigation of chromium, cerium and cobalt as markers in digesta. Rate of passage studies. Journal of the Science of Food and Agriculture 31: 625632.
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

A note on the response of store lambs to iso-nitrogenous diets containing rapeseed meal or fish meal

  • P. V. Tan (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.