The aim ol this study was to determine dry matter (DM) degradabilities and energy contents ol some cereal grains commonly used in ruminant nutrition by nylon bag technique. Thereby, six samples (collected from different regions) ol corn, barley, wheat, rye. oat and trilicale were utilized in the study. Each samples in duplicate were incubated in the rumen of three fistulated rams for 2, 4. 8 16, 24 and 48 hours. Majonty of DM was degraded in barley. wheal, rye, oat and trilicale (73.16%, 80.70%, 81.66 %, 65.17% and 75.87%. respectively), bul DM degradability of corn was slower and 35.00 % after 2 h incubation. Dry matter degradability of corn consistently continued until 48-h incubation time and was 86.62 % after 48 h incubation. Dry matter degradabilities of barley, oat. and trilicale also continued until 48-h incubation time and were 87.78, 72.58 and 93.76 %, respectively, after 48 h incubation. Dry matter degradabilities of wheat (90.73 %) and rye (91.04 %) reached the peak level after 16 h incubation. Digestible and me-tabolzable energy values oi samples were corralated with DM and OM degradabilities. Energy values reached the peak level in which DM degradibilities reached the peak levels, and energy values did not differ afterward. Me-tabolizable energy values were 13.90 MJ/kg DM for corn, 13.55 MJ/kg DM for barley, 11.25 Mj/kg DM for oat, and 14 47 MJ/kg DM for trilicale based on 48 h incubation; 13,68 MJ/kg DM for rye based on 24 h incubation: and 13.55 MJ/kg DM for wheat based on 16 h incubation.