Hostname: page-component-7479d7b7d-qs9v7 Total loading time: 0 Render date: 2024-07-13T16:01:32.633Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the utilization of the energy of the short-chain fatty acids in the fattening sheep

Published online by Cambridge University Press:  02 September 2010

P. R. Lawrence  and
P. C. Thomas
P. R. Lawrence
Affiliation:
School of Biological Sciences, The University, Leeds LSI 9JT
P. C. Thomas
Affiliation:
School of Biological Sciences, The University, Leeds LSI 9JT
Get access

Summary

Complete C, N and energy balances were carried out on two mature sheep receiving a basal diet of pelleted hay plus continuous intraruminal infusions of either water or 400 kcal/day of propionic acid, butyric acid or a mixture of acetic acid and sodium acetate, for periods of 1 to 5 weeks. The efficiency of utilization for maintenance plus fattening of the basal diet and the basal diet supplemented with acetate, propionate or butyrate was 20·7 ± 1·0%, 28·3 ± 1·5%, 30·2 ± 0·5% and 31·3 ± 0·2%, respectively. The calculated efficiency of utilization for fattening (kf) of the infused energy sources was 69·9 ± 8·4%, 84·0 ± 3·4% and 86·0±2·0% for acetate, propionate and butyrate, respectively. In most instances kf did not vary with the length of the period of infusion but in one sheep there was an adverse response to the infusion of the acetate mixture, and during the first week of infusion kt was only 29·3%. During the third and fifth weeks of the infusion the corresponding values were 76±3% and 72±5%.

Type
Research Article
Information
Animal Production , Volume 17 , Issue 2 , October 1973 , pp. 209 - 212
Copyright
Copyright © British Society of Animal Science 1973

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

Armstrong, D. G. and Blaxter, K. L. 1957. The utilization of acetic, propionic and butyric acids by fattening sheep. Br. J. Nutr. 11: 413–425.Google Scholar
Armstrong, D. G., Blaxter, K. L., Graham, N. McC. and Wainman, F. W. 1958. The utilization of the energy of two mixtures of steam-volatile fatty acids by fattening sheep. Br. J. Nutr. 12: 177–188.Google Scholar
Blaxter, K. L., Graham, N. McC. and Rook, J. A. F. 1954. Apparatus for the deter-mination of the energy exchange of calves and of sheep. J. agric. Sci., Comb. 45: 10–19.CrossRefGoogle Scholar
Brouwer, E. 1965. Report of sub-committee on constants and factors. In Energy Metabolism (ed. Blaxter, K. L.) pp. 441–444. Academic Press, London.Google Scholar
Bull, L. S., Reid, J. T. and Johnson, D. E. 1970. Energetics of sheep concerned with the utilization of acetic acid. J. Nutr. 100: 262–276.Google Scholar
Fertilizer and Feedingstuffs Regulations. 1960. Her Majesty's Stationery Office, Statutory Instrument No. 1165.Google Scholar
Johnson, D. E. 1972. Heat increment of acetate and corn and effects of casein infusions with growing lambs. J. Nutr. 102: 1093–1100.Google Scholar
Nukamp, H. J. 1965. Some remarks about the determination of the heat of combustion and the carbon content of urine. In Energy Metabolism (ed. Blaxter, K. L.) pp. 147–157. Academic Press, London.Google Scholar
Robb, J. and Reid, J. T. 1972. Energetic efficiency of the utilization of acetic acid and glycerol by fattening sheep. Br. J. Nutr. 28: 249–259.Google Scholar