Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-29T01:40:32.230Z Has data issue: false hasContentIssue false
  • English
  • Français

The performance of beef cattle given diets of barley supplemented with either vegetable protein or non-protein nitrogen

Published online by Cambridge University Press:  02 September 2010

T. Walker ,
M. Kay ,
T. R. Preston ,
I. McDonald ,
N. A. MacLeod  and
A. Macdearmid
T. Walker
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
M. Kay
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
T. R. Preston
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
I. McDonald
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
N. A. MacLeod
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
A. Macdearmid
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
Get access

Extract

1. Four growth trials were carried out with 297 group-fed steers given diets based on barley, minerals and vitamins, unsupplemented or supplemented with either soya bean meal or various sources of non-protein nitrogen.

2. Steers given unsupplemented barley (11% crude protein in dry matter) had inferior growth rates up to 300 kg live weight but thereafter were equal to those given barley supplemented with urea in the drinking water or soya bean meal.

3. There were no significant differences in the growth rates of steers given barley supplemented with soya bean meal and those given barley supplemented with ammonium and mineral salts of formic acid or a mixture of acids (predominantly acetic).

4. In two out of three trials, tenth-rib joints from steers given barley supplemented with ammonium salts of mixed acids contained less fat and more protein and water than those from steers given barley supplemented with soya bean meal or proprietary protein supplements.

5. A number of possible explanations for the apparent carcass differences is discussed.

Type
Research Article
Information
Animal Production , Volume 10 , Issue 4 , November 1968 , pp. 381 - 391
Copyright
Copyright © British Society of Animal Science 1968

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

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2, Ruminants. Agricultural Research Council, London.Google Scholar
Association of Official Agricultural Chemists 1965. Official Methods of Analysis of the A.O.A.C.Google Scholar
Jackson, P., Hodgson, J. and Rook, J. A. F. 1968. The use of ammonium salts of the short chain fatty acids as a dietary supplement for the dairy cow. Anim. Prod. 10: 231–232 (Abstr.).Google Scholar
Kay, M., Bowers, H. B. and McKiddie, G. 1968. The protein requirements of rapidly growing steers. Anim. Prod. 10: 37–42.Google Scholar
Kay, M., Walker, T. and McKiddie, G. 1967. The effect of ammonium acetate on the yield and composition of milk from heifers. Anim. Prod. 9: 477–482.Google Scholar
ØRskov, E. R. and Allen, D. M. 1966a. Utilization of salts of volatile fatty acids by growing sheep. 1. Acetate, propionate and butyrate as sources of energy for young growing lambs. Br. J. Nutr. 20: 295–305.Google Scholar
ØRskov, E. R. and Allen, D. M. 1966b. 4. Effects of type of fermentation of the basal diet on the utilization of salts of volatile fatty acids for nitrogen retention and body gains. Br. J. Nutr. 20: 519–532.Google Scholar
Preston, T. R., Aitken, J. N., Whttelaw, F. G., Macdearmid, A., Philip, E. B. and MacLeod, N. A. 1963. Intensive beef production. 3. Performance of Friesian steers given low fibre diets. Anim. Prod. 5: 245–250.Google Scholar
Preston, T. R., Kay, M., Walker, T., Bowers, H. B., MacLeod, N. A., MacDearmid, A., Philip, E. B. and Hargrave, K. R. 1965. The effect of different sources of dietary nitrogen on performance of intensive beef cattle. Anim. Prod. 7: 288 (Abstr.).Google Scholar
Repp, W. W., Hale, W. H. and Burroughs, W. 1955. The value of several non-protein nitrogen compounds as protein substitutes in lamb fattening rations. J. Anim. Sci. 14: 901–908.Google Scholar
Rook, J. A. F., Balch, C. C., Campling, R. C. and Fisher, L. V. 1963. The utilization of acetic, propionic and butyric acids by growing heifers. Br. J. Nutr. 17: 399–406.CrossRefGoogle ScholarPubMed