An experiment was conducted to examine the effects of increasing intake of barley grain or     
barley grain plus protein as supplement on microbial crude protein (MCP) production, efficiency of     
microbial crude protein production (eMCP) in the rumen of Brahman steers consuming low quality forage.     
Ten steers were used and allocated to two supplement groups namely barley grain (B) and barley plus     
protein (BP). The experimental design was two incomplete 5x5 Latin Squares, each with three runs. Each     
run consisted of a 21 d adaptation and 7 d collection period. Steers received Green panic hay ad libitum     
with one of five levels of B or BP (0; 0.5; 1.0; 1.5 and 2.0% of body weight per day (W/d)). MCP production     
in the rumen increased linearly (P