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¹ Süleyman Demirel Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Isparta
² Ondokuzmayıs Üniversitesi, Bafra Meslek Yüksekokulu, Samsun DOI : 10.21566/tarbitderg.323602 - This research was conducted to determine the effects of four different nitrogen doses (0, 3, 6, 9 and 12 kg/da), on yield and quality components of two phacelia (Phacelia tanacetifolia Bentham) cultivars (Enton and Stala) under Eskişehir conditions in the 2014 and 2015 growing seasons. The highest green forage and hay yields were obtained from 6 kg/da nitrogen dose (2981 kg and 712 kg, respectively) for Enton cultivar, from 9 kg/da nitrogen dose (2113 kg and 537 kg, respectively) for Stala cultivar. It was determined that the highest crude protein ratio at 6 kg/da or more nitrogen fertilizations, the highest crude protein yield was 98.01 kg/da at the 9 kg/da nitrogen fertilization. While increasing nitrogen doses, ADF and NDF contents were decreased, TDN content of phacelia cultivars were increased. The highest RFV value was determined at the all nitrogen fertilization doses except control plot. In conclusion, it was regarded that green forage yield, hay yield, crude protein ratio, crude protein yield and relative feed value, Enton cultivar can be preferred over Stala cultivar. It is possible to obtain high forage yield and good quality with 9 kg/da nitrogen application in similar ecologies. Keywords : Phacelia, forage yield, quality, fertilization