Rumen micro-organisms in the treated groups are presented in Table 3 and were found significantly higher than those in the control group. It was significantly (p < 0.05) higher than in the control group and was
the highest in the 50 g/kg urea treatment, 30 g/kg urea + 20 g/kg Ca(OH)2-treated groups for bacteria, fungi and cellulolytic bacteria, while protozoal population was significantly lower (p < 0.05) than in the control group. In addition, the population of proteolytic and amylolytic bacteria in treated group were significantly (p < 0.05) higher than in control group