Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-26T17:36:46.108Z Has data issue: false hasContentIssue false
  • English
  • Français

Efficiency of the utilization of the energy of food in laying hens

Published online by Cambridge University Press:  27 March 2009

Gh. Burlacu  and
Margareta Baltac
Gh. Burlacu
Affiliation:
Institute of Animal Nutrition, Romania
Margareta Baltac
Affiliation:
Institute of Animal Nutrition, Romania
Get access Rights & Permissions [Opens in a new window]

Summary

The efficiency of utilization of the energy of food in White Leghorn laying hens for egg production was measured. A ration with a gross energy of 4469 kcal/kg dry matter and 19·4% crude protein had a metabolizable energy of 80·1±1·7% of the gross energy, and 78·5±5·3% of the metabolizable energy was present as net energy.

The maintenance requirement of metabolizable energy of White Leghorn hens weighing 1·723±48·5 kg and a production of 19·3±0–49 eggs per month was 125·8 kcal/kg0·75/24 hr.

The energy cost per g of protein and fat synthesized by laying White Leghorn hens was estimated to be 7·20 and 12·13 kcal metabolizable energy respectively.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 77 , Issue 3 , December 1971 , pp. 405 - 411
Copyright
Copyright © Cambridge University Press 1971

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

Burlacu, Gh., Grossu, Doina, Marinescu, G., Baltac, Margareta & Grunca, Dumitra (1969). Efficiency of utilization of the energy of starch in birds. In Energy metabolism of farm animals, Oriel Press, pp. 369–75. (EAAP Publ. no. 12.)Google Scholar
Burlacu, Gh., Baltac, Margareta & Paraschiv, M. (1970). Efficiency of utilization of food energy in growing chickens. In Energy metabolism of farm animals, Zürich: Juris, pp. 209–13. (EAAP Publ. no. 13).Google Scholar
Eriksson, S. (1958). Determination of the maintenance requirements of domestic animals. Proc. 1st Symposium on energy metabolism, Copenhagen, pp. 203–10.(EAAP Publ. no. 8.)Google Scholar
van Es, A. J. H., Vic-Mo, L., Janssen, H., Bosch, Andy, Spreenwenberg, W., Vogt, J. E. & Nijkamp, H. J. (1970). Balance trials with laying hens. In Energy metabolism of farm animals, Zürich: Juris, pp. 201–5. (EAAP Publ. no. 13.)Google Scholar
Kielanowscki, J. (1965a). Estimates of the energy cost of protein deposition in growing animals. In Energy metabolism, Academic Press, pp. 13–18. (EAAP Publ. no. 11.)Google Scholar
Kielanowscki, J. (1965b). The energy cost of protein synthesis in lactation. In Energy metabolism, Academic Press, pp. 18–19. (EAAP publ. no. 11.)Google Scholar
Kotarbinska, M. & Kielanowscki, J. (1969). Energy balance studies with growing pigs by the comparative slaughter technique. In Energy metabolism of farm animals, Oriel Press, pp. 299–310. (EAAP publ. no. 12.)Google Scholar
Lang, K. & Ranke, O. (1950). Stoffwechsel und Ernärung. Berlin: Akademie Verlag, p. 46.CrossRefGoogle Scholar
Ørskov, E. R. & McDonald, I. (1970). Tho utilization of dietary energy for maintenance and for fat and protein deposition in young growing sheep. In Energy metabolism of farm animals, Zürich: Juris, pp. 121–4. (EAAP Publ. no. 13.)Google Scholar
Petersen, Chr. Bønsdorff (1970). Efficiency of protein and fat deposition in growing chickens determined by respiration experiments. In Energy metabolism of farm animals, Zürich: Juris, pp. 205–8. (EAAP Publ. no. 13.)Google Scholar
Thorbek, Grete (1970). The utilization of metabolizable energy for protein and fat in growing pigs. In Energy metabolism of farm animals, Zürich: Juris, pp. 129–32. (EAAP Publ. no. 13.)Google Scholar
Waring, J. J. & Brown, W. O. (1965). A respiration chamber for the study of energy utilization for maintenance and production in the laying hens. J. agric. Sci., Camb. 65, 139–46.CrossRefGoogle Scholar