Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-27T19:07:54.891Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of source of nitrogen and level of its supplementation on the performance of growing-fattening bulls

Published online by Cambridge University Press:  02 September 2010

D. Levy ,
Z. Holzer ,
V. Samuel  and
I. Bruckental
D. Levy
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Haifa Post, Israel
Z. Holzer
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Haifa Post, Israel
V. Samuel
Affiliation:
Agricultural Research Organization, Newe Ya'ar Regional Experiment Station, Haifa Post, Israel
I. Bruckental
Affiliation:
Agricultural Research Organization, Institute of Animal Science, Bet Dagan, Israel
Get access

Abstract

Two feeding trails were made and in both all the diets given contained about 11 MJ metabolizable energy (ME) per kg dry matter (DM).

In trial 1, diets containing three concentrations of crude protein (CP) were given to a total of 84 Friesian bulls in each of three stages of growth. They were, in stage 1 (150 to 250 kg live weight) 130, 145 and 160 g CP per kg dietary DM; in stage 2 (250 to 350 kg live weight) 110, 130 and 145 g CP per kg dietary DM; in stage 3 (350 kg to slaughter) 95, 110 and 130 g CP per kg dietary DM. In stages 2 and 3, the source of supplementary nitrogen at each CP concentration was either soya-bean meal or non-protein nitrogen (NPN) giving six combinations of concentration and source of dietary CP. Live-weight gains in stage 1 were 1·52, 1·60 and 1·58 kg/day respectively (P > 0·05). In the stages involving both concentrations and source of nitrogen (soya-bean meal in parentheses), the mean daily live-weight gains were (1·40), 1·38, (1·32), 1·34 (1·34) and 1·31 kg for stage 2 (F > 0·05) and (1·14), 1·14, (1.24), 1·16, (1·06) and 1·08 kg for stage 3 (P < 0·05), for the diets of 130, 145 and 160 g CP per kg diet respectively.

Trial 2 consisted of six stages of growth, the first five of 45 days duration and the sixth of varying length up to a predicted slaughter weight, and seven dietary treatments. Treatment 1 was a negative control (NC) with a dietary CP concentration of 90 g/kg DM. For the other six treatments two concentrations of dietary CP were given; 120 g/kg and 140 g/kg in stages 1 and 2 and 100 g/kg or 120 g/kg in stages 3 to 6. Dietary CP concentration was increased by the addition of NPN, fish meal or soya-bean meal. A total of 98 Friesian bulls were used with an initial average live weight of 185 kg. Daily gain of the NC group in the six stages of the trial was 0·86, 0·97, 101, 1·13, 1·07 and 1·00 kg for stages 1 to 6 respectively. From the results it was concluded that feeding NPN is not efficient at live weights lower than 250 kg and that there is no advantage to feeding fish meal over soya-bean meal in diets of medium energy concentration at live weights heavier than 250 kg.

Type
Research Article
Information
Animal Production , Volume 43 , Issue 3 , December 1986 , pp. 377 - 384
Copyright
Copyright © British Society of Animal Science 1986

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
Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Duncan, D. B. 1955. Multiple-range and multiple F tests. Biometrics 11: 1–42.CrossRefGoogle Scholar
Holzer, Z., Levy, D., Samuel, V. and Bruckenthal, I. 1986. Interactions between supplementary nitrogen source and ration energy density on performance and nitrogen utilization in growing and fattening male cattle. Animal Production 42: 19–28.Google Scholar
Kay, M. and MacDearmid, A. 1972. A note on the need for supplementary nitrogen in diets for fattening beef cattle. Animal Production 14: 367–369.Google Scholar
Levy, D., Holzer, Z. and Volcani, R. 1968. The effect of age and live weight on feed conversion and yield of saleable meat of intact Israeli-Friesian male calves. Animal Production 10: 325–330.Google Scholar
National Research Council. 1976. Nutrient Requirements of Domestic Animals. No. 4, Nutrient Requirements of Beef Cattle, 5th ed National Academy of Sciences, Washington, DC.Google Scholar
National Research Council. 1984. Nutrient Requirements of Domestic Animals. No. 4, Nutrient Requirements of Beef Cattle. 5th ed. National Academy of Sciences, Washington, DC.Google Scholar
Preston, T. R. and Willis, M. B. 1970. Intensive Beef Production. Pergamon Press, London.Google Scholar
Putnam, P. A., Oltjen, R. R. and Bond, J. 1969. Effect of soybean oil, urea, roughage and a progestigin on the utilization of corn based finishing rations by beef cattle. Journal of Animal Science 28: 256–262.CrossRefGoogle Scholar
Robertson, I. S., Paver, H. and Wilson, J. C. 1970. Effect of castration and dietary protein level on growth and carcass composition in beef cattle. Journal of Agricultural Science, Cambridge 74: 299–310.Google Scholar
Roy, J. H. B., Balch, C. C., Miller, E. L., Ørskov, E. R. and Smith, R. H. 1977. Calculation of the N-requirement for ruminants from nitrogen metabolism studies. Proceedings of 2nd Symposium on Protein Metabolism and Nutrition. Publication of the European Association of Animal Production No. 22, pp. 126–129. Centre for Agricultural Publishing and Documentation, Wageningen.Google Scholar
Satter, L. D. and Slyter, L. L. 1972. Effect of ammonia concentrations on ruminal microbes in vitro. Journal of Animal Science 35: 273 (Abstr.).Google Scholar
Williams, D. B., Vetter, R. L., Burroughs, W. and Topel, O. G. 1975. Dairy beef production as influenced by sex, protein level and DES. Journal of Animal Science 41: 1532–1541.CrossRefGoogle Scholar
Young, A. W. 1969. Ration adjustment response of the bovine to different nitrogen sources. Ph.D. Thesis, University of Kentucky, Lexington.Google Scholar