TY  - JOUR
T1  - Effect of Concentrate Mixed with Extrusion-processed Mixture of Cassava Pulp and Urea (EMCPU) and Varying Levels of Ruminal Undegradable Protein on Digestibility, Rumen Fermentation and Nitrogen Balance of Beef Cattle
AU - Pimpa, O. AU - Paengkoum, Pramote AU - Bunnakit, K. 
JO  - Research Journal of Applied Sciences
VL  - 5
IS  - 4
SP  - 267
EP  - 273
PY  - 2010
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2010.267.273
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2010.267.273
KW  - quadratically
KW  -ruminal undegradable protein
KW  -beef cattle
KW  -nitrogen balance
KW  -EMCPU
KW  -nitrogen retention
AB  - This experiment aimed to study the effects concentrate mixed with Extrusion-processed Mixture of Cassava Pulp and Urea (EMCPU) and varying levels of Ruminal Undegradable Protein (RUP) on productive performance of crossbred (Thai Native x Brahman) beef cattle. Four cattle with an average bodyweight of 175.5&plusmn;18.6 kg) were used in a 4x4 Latin square arrangement of treatments with 21 days periods. The treatments were the concentrate mixed with EMCPU and varying levels of RUP at 30, 35, 40 and 45% (T1, T2, T3 and T4). Animal were fed at 2.0% BW of concentrate mixed and all animals were fed <I>ad libitum</I> with urea treated rice straw as roughage. The results showed that dry matter intake increased linearly (p&lt;0.01) as the level of RUP increased. Moreover, organic matter digestibility increased linearly (p&lt;0.05) with increasing the level of RUP. Ruminal ammonia-N concentration was highest in 30% RUP. In addition, linearly decrease in ruminal ammonia-N (p&lt;0.01) reflected increases in level of RUP however, at 45% RUP, NH<SUB>3</SUB>-N was increased quadratically (p&lt;0.01). Total volatile fatty acid (94.3, 113.25, 116.7, 112.1 mM L<SUP>-1</SUP>; p&lt;0.01) increased linearly (p&lt;0.01) as the level of RUP increased. However, at 45% RUP, TVFAs decreased quadratically (p&lt;0.01). Increase in bacteria and protozoa populations reflected increased in level of RUP from 30-40%. However, bacteria and protozoa populations were decreased (quadratically, p&lt;0.05) as the level of RUP increased from 40-45%. Nitrogen absorption was not significantly different among dietary treatments. Nitrogen retention (20.9, 19.7, 31.0, 21.5 g day<SUP>-1</SUP>; p&lt;0.05) was highest in 40% RUP and tended to increase as level of RUP increased however, at N retention at 45% RUP tended to decrease (quadratically, p = 0.1). These results indicated that 35% CP from EMCPU replacement for RUP levels at 40% in concentrate have positive effects on crossbred Native x Brahman beef cattle production.
ER  -