This research was conducted to investigate the effects of different nitrogen doses on the yield and quality of annual ryegrass (Lolium multiflorum westerwoldicum Caramba) at the Agricultural Application and Research Center of Agriculture Faculty, Uludag University under Bursa conditions in 2015-2016 and 2016-2017. Seven nitrogen dose (0, 10, 20, 30, 40, 50 and 60 kg N da(-1)) was applied in the experiment with three replications using Randomized Complete Block Design. Caramba variety of annual ryegrass was used as a plant material in this study. In the research, some characters such as plant height, SPAD value, forage yield, dry matter yield, crude protein ratio, crude protein yield, ADF and NDF ratios were investigated. According to the results; nitrogen doses were effective on plant height, SPAD value, crude protein ratio and yield, NDF, forage yield and dry matter yield. It is advisable to use 50 kg da(-1) nitrogen dose to obtain high yield and quality in annual ryegrass cultivation in Bursa and similar conditions.