Six metabolism trials were carried out using 3 Barki rams (in each) with average body weight of 55±0.58 kg and aged 3 years to evaluate the digestibility coefficients and nutritive values of the mixtures of dried sugar beet pulp with different roughages as follows:- I- 75% dried sugar beet pulp + 25 % berseem hay. II- 75% dried sugar beet pulp + 25 % wheat straw. III- 75% dried sugar beet pulp + 25 % rice straw.   V- 50% dried sugar beet pulp + 50 % berseem hay. IV- 50% dried sugar beet pulp + 50 % wheat straw. VI- 50% dried sugar beet pulp + 50 % rice straw.                        The obtained results showed that dried sugar beet pulp is high in CF (24.50%) and NFE (57.10%), while it is low in CP (10.40%). The digestibility of all nutrients, nutritive values and nitrogen balance were significantly (P<0.05) higher with berseem hay compared to wheat and rice straws. Ruminal pH value increased with increasing the level of roughages and decreasing the level of dried sugar beet pulp. Ration contained rice straw showed the higher pH value, while those contained berseem hay had the lower values. The highest concentrations of TVFA's and ammonia-N were recorded with berseem hay compared with wheat and rice straws. These values decreased with increasing the level of roughage and decreasing the level of dried sugar beet pulp (P<0.05). There were significant differences in the total count of erythrocytes and leukocytes as well as in hemoglobin and globulin concentrations and ALT activity among the different treatments.