Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-28T03:50:01.976Z Has data issue: false hasContentIssue false

A note on energy intake and nitrogen balance of fattening lambs given all-concrate diets

Published online by Cambridge University Press:  02 September 2010

P. J. Davies
Affiliation:
Essex Institute of Agriculture, Writtle
Get access

Extract

The growth rate and food conversion efficiency of fattening lambs given all-concentrate diets have been reported by Philip Preston and Greenhalgh (1964). The lambs were weaned abruptly at 8 weeks old and fed thereafter ad libitum on cereal and protein supplement. Owen, Davies and Ridgman (1965) have reported the same measures of performance for artificially reared lambs fed from 30 lb. to slaughter at 75 lb. on diets varying indigestibility. A considerable amount of information has been obtained recently on the nitrogen metabolism of young calves fed on all-concentrate diets (see Preston, Whitelaw, MacLeod and Philip, 1965, and Bowers, Preston, McDonald, MacLeod and Philip, 1965) but there is less information of a similar nature for lambs fed on such diets. The following experiment was carried out to assess the intake of energy and utilisation of dietary nitrogen by lambs fed ad libitum on three simple all-concentrate diets during the latter stages of fattening.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1966

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

Blaxter, K. L., 1962. The Energy Metabolism of Ruminants. Hutchinson, London.Google Scholar
Bowers, H. B., Preston, T. R., McDonald, I., MacLeod, N. A., & PhilipEuphemia, B. Euphemia, B., 1965. Intensive beef production. 5. The effect of different sources of protein on nitrogen retention. Anim. Prod., 7: 7303.Google Scholar
Owen, J. B., Davies, D. A. R., & Ridgman, W. J., 1965. The voluntary food intake and performance of intensively reared lambs given pelleted diets of varying digestibility. Anim. Prod., 7: 289 (Abstr.).Google Scholar
Philip, Euphemia B., Preston, T. R., & Greenhalgh, Isoline, 1964. All concentrate diets for intensive fat lamb production. Anim. Prod., 6: 261. (Abstr.)Google Scholar
Preston, T. R., Whitelaw, F. G., MacLeod, N. A., & Philip, Euphemia B., 1965. The nutrition of the early weaned calf. VIII. The effect on nitrogen retention of diets containing different levels of fish meal. Anim. Prod., 7: 753.Google Scholar
Whitelaw, F. G., Preston, T. R., & Dawson, G. S., 1961. The nutrition of the early weaned calf. II. A comparison of commercial groundnut meal, heat treated groundnut meal and fish meal as the major protein source in the diet. Anim. Prod., 3: 3127.Google Scholar