Subscribe Now Subscribe Today
Research Article

Effect of Rumen Undegradable Protein Levels on Performance of Thai Native x Brahman Beef Cattle

Kanin Bunnakit and Sittisak Khampa
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

This experiment aimed to study the effects of rumen undegradable protein levels on productive performance of Thai Native-Brahman beef cattle. Four yearling Thai Native x Brahman beef cattle with an average Body Weight (BW) of 175.5±18.6 kg were used in a 4 x 4 Latin square arrangement. The treatments were levels of Rumen Undegradable Protein (RUP) in concentrate at 30, 35, 40 and 45%. Concentrates were formulated to contain 14% CP and were fed at 2.0% BW. The results showed that the DM intake, OM digestibility and TVFA increased linearly (p<0.05) while the level of RUP increased. Moreover, the ruminal NH3-N (p<0.01) and BUN linearly decreased, whereas at 45% RUP the ruminal NH3-N concentration increased (quadratically, p<0.01). The bacteria and protozoa populations also increased as the level of RUP increased. However, the bacteria and protozoa populations decreased quadratically (p<0.05) when the level of RUP changed from 40 to 45%. The N retention (g/d) tended to increase with increasing the level of RUP. However, the N retention tended to decrease at the level of 45% RUP. It could be concluded that RUP level at 40% in concentrate had positive effects on productive performances.

Related Articles in ASCI
Similar Articles in this Journal
Search in Google Scholar
View Citation
Report Citation

  How to cite this article:

Kanin Bunnakit and Sittisak Khampa, 2011. Effect of Rumen Undegradable Protein Levels on Performance of Thai Native x Brahman Beef Cattle. Pakistan Journal of Nutrition, 10: 1163-1167.

DOI: 10.3923/pjn.2011.1163.1167


1:  AOAC., 1985. Official Methods of Analysis. 16th Edn., Association of Official Analytical Chemists, Washington, DC..

2:  Bach, A. and M.D. Stern, 2000. Measuring resistance to ruminal degradation and bioavailability of ruminally protected methionine. Anim. Feed Sci. Tecnol., 84: 23-32.

3:  Briggs, P.K., J.F. Hogan and R.L. Reid, 1957. The effect of volatile fatty acid, lactic acid and ammonia on rumen pH in sheep. Aust. J. Agric. Res., 8: 674-710.

4:  Bremner, J.M. and D.R. Keeney, 1965. Steam distillation methods of determination of ammonium, nitrate and nitrite. Anal. Chem. Acta, 32: 485-495.
CrossRef  |  

5:  Davis, G.V. and O.T. Stallcup, 1967. Effect of soybean meal, raw soybeans, corn gluten feed and urea on the concentration of rumen fluid components at intervals after feeding. J. Dairy Sci., 50: 1638-1645.
PubMed  |  Direct Link  |  

6:  Faichney, G.J. and R.H. Weston, 1971. Digestion by ruminant lambs of a diet containing formaldehyde-treated casein. Aust. J. Agric. Res., 22: 461-468.
CrossRef  |  

7:  Helmer, L.G., E.E. Bartley and C.W. Deyoe, 1970. Feed processing. VI. Comparison of starea, urea and soybean meal as protein source for lactating dairy cow. J. Dairy Sci., 53: 883-887.
Direct Link  |  

8:  Herrera-Saldana, R.J., T. Huber and M.H. Poore, 1990. Influence of varying protein and starch degradabilities on performance of lactating cows. J. Dairy Sci., 72: 1477-1483.

9:  Hobson, P.N., 1971. Rumen microorganisms. Progr. Ind. Microbial., 9: 41-41.

10:  Hungate, R.E., 1966. The Rumen and its Microbes. 1st Edn., Academic Press, London, Pages: 553.

11:  Jouaney, J.P. and K. Ushida, 1999. The role of protozoa in feed digestion. Asian-Aust. J. Anim. Sci., 12: 113-129.

12:  Kim, C.H., 2001. Effect of different protein sources given synchronously or asynchronously into the rumen of consuming a beef cattle diet high in concentrate on the synthesis of microbial protein. Anim. Feed Sci. Technol., 43: 831-840.

13:  McDonald, I.W., 1948. The absorption of ammonia from the rumen of sheep. Biochem. J., 42: 584-587.
Direct Link  |  

14:  Orskov, E.R., 1976. Nitrogen digestion and utilization by young and lactating ruminants. World Rev. Nutr. Diet., 1977: 225-257.
PubMed  |  

15:  Peter, A.P., E.E. Hatfield, F.N. Owens and U.S. Garrigus, 1971. Effects of aldehyde treatments of soybean meal on in vitro ammonia release, solubility and lamb performance. J. Nutr., 101: 605-611.
PubMed  |  

16:  SAS, 1996. SAS User's Guide: Statistics. 14th Edn., Version 6, SAS Institute Inc., Cary, NC., USA.

17:  Schelling, G.T. and E.E. Hatfield, 1968. Effect of abomasally infused nitrogen sources on nitrogen retention of growing lambs. J. Nutr., 96: 319-326.
PubMed  |  

18:  Sinclair, L.A., P.C. Garnsworth, J.R. Newbold and P.J. Buttery, 1993. Effect of synchronizing the rate of dietary energy and nitrogen release on rumen fermentation and microbial protein synthesis in sheep. J. Agric. Sci. Cambridge, 120: 251-263.
CrossRef  |  Direct Link  |  

19:  Stiles, D.A., E.E. Bartley, R.M. Meyer, C.W. Deyoe and H.B. Pfost, 1970. Feed processing. VII. Effect of an expansion processed mixture of grain and urea (Starea) on rumen metabolism in cattle and on urea toxicity. J. Dairy Sci., 53: 1436-1441.
PubMed  |  Direct Link  |  

20:  Steel, R.G.D. and J.H. Torrie, 1980. Principles and Procedure of Statistics. McGraw-Hill Book Co., New York, USA.

21:  Witt, M.W., L.A. Sinclair, R.G. Wilkinson and P.J. Buttery, 1999. The effects of synchronizing the rate of dietary energy and nitrogen supply to the rumen on the production and metabolism of sheep: Food characterization and growth and metabolism of ewe lambs given food ad libitum. Br. Soc. Anim. Sci., 69: 223-235.

22:  Goering, H.K. and P.J. Van Soet, 1970. Forage fiber analyses (apparatus, reagents, procedures and some applications). Agriculture Handbook No. 379, ARS-USDA, Washington, DC., USA., pp: 1-20.

©  2020 Science Alert. All Rights Reserved