This research was carried out in Bucak district of Burdur province during the vegetation period of 2019-2020 to determine some yield and quality characteristics of nine different Italian ryegrass varieties. The experiment was established in randomized block design with three replications. In the study, the main stem length, main stem thickness, green herbage yield, hay yield, crude protein ratio, crude protein yield in Italian grass varieties named Medoacus, Reis, Rambo, Trinova, Alberto, Baqueno, Devis, Efe-82, and Bigboss. ADF rate and NDF rates have been investigated. Main stem lengths of Italian grass varieties were determined between 100.00-107.33 cm, main stem thickness was 2.53-3.95 mm, green herbage yields were 3108-5550 kg da-1, hay yields were 1147.25-1634.43 kg da-1, crude protein ratio was 11.23-15.47%, crude protein yield was 152.93-219.77 kg da-1, ADF rates 33.51-3 6.61% and NDF rates 58.31-62.22%. While the differences between main stem thickness, green herbage yields, crude protein ratios, ADF and NDF ratios of the varieties were found to be significant at the level of 1%, the differences between the hay yields and crude protein yield averages of the varieties were found to be significant at the 5% level. The highest green herbage yield, hay yield and crude protein ratio were obtained from Sorge, Rambo, Trinova varieties, and the lowest values in terms of ADF and NDF values were determined in Notion and Efe-82 varieties.
