The effects of N fertilization and cutting time on the total nitrogen yield, and utilization of accumulated total nitrogen in Sb + R (stubble + root) parts to the regrowth of Lb + Ls (leaf blade and leaf sheaths + stem) parts was studied in three orchardgrass varieties with different earliness. The results are may be summarized as follows; 1. Nitrogen application at early spring was affected to accumulating the total nitrogen in Sb + R parts. 2. Total nitrogen distribution ratio to Lb + Ls in C-2, it were 93.6%, 98.3% and 87.3% in Chinook, Kitamidori and S143, respectively. 3. Total nitrogen distribution ratio to Sb + R parts in C-3, it were 25.2%, 33.1% and 23.8% in Chinook, Kitamidori and S143, respectively. 4. The Chinook and S143 showed a high relative total nitrogen yield in C-2 and Kitamidori in C-3, respectively. 5. The variety with high total nitrogen of Sb + R parts which has a higher total nitrogen of Lb + LS parts than those of varieties with low total nitrogen of Sb + R parts in each cutting. 6. The relationship between the TN of Sb + R parts and the DM of Lb + Ls parts after the cuttings, showed a significant correlation (0.8024) in C-2, but there was nonsignificant correlation (0.3765) in C-3. 7. Average increase in annual TN yield obtained were 0.72g, 0.948 and 0.66g TN/g N in Chinook, Kitamidori and S143, respectively.