Kanin Bunnakit
Faculty of Liberal Arts and Science, Roi-et Rajabhat University, Kohkaew, Selaphum, Roi-et, P.O. Box 45120, Thailand
Sittisak Khampa
Faculty of Agricultural Technology, Rajabhat Mahasarakham University, P.O. Box 44000, Thailand
ABSTRACT
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.
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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
URL: https://scialert.net/abstract/?doi=pjn.2011.1163.1167
DOI: 10.3923/pjn.2011.1163.1167
URL: https://scialert.net/abstract/?doi=pjn.2011.1163.1167
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