Akademik Veri Yönetim Sistemi
LIBERTE, cilt.13, sa.10, ss.76-88, 2025 (SCI-Expanded, AHCI, SSCI, ESCI, Scopus)
This research was conducted to determine the optimum nitrogen fertilizer requirements of bread wheat varieties registered by Eastern Mediterranean Agricultural Research Institute. The experiments were carried out in a randomized block split-plot experimental design with three replicates, with varieties in the main plots and nitrogen doses in the sub-plots. Four bread wheat varieties (Gökkan, Yakamoz, Altınöz and Candaş) were used as seed material. Five different nitrogen levels (0, 70, 140, 210 and 280 kg N/ha) were applied for bread wheat varieties. At sowing, 80 kg P2O5/ha was applied to all plots. As a result of the research, the optimum nitrogen doses required for wheat varieties were determined by regression analysis. It was determined that there was a quadratic relationship (Y= a+bx+cx2) between yield and nitrogen dose in all varieties. As a result of the analysis, the optimum nitrogen dose for the Gökkan variety is 213.84 kg/ha, for the Yakamoz variety 186.28 kg/ha, for the Altınöz variety 176.03 kg/ha and for the Candaş variety 192.81 kg/ha. The highest yield was obtained from Gökkan variety and the lowest yield was obtained from Yakamoz variety. It was determined that increasing nitrogen doses increased plant height and the number of spike per square meter increased with increasing nitrogen doses, but caused a decrease in the high nitrogen dose (280 kg N/ha). It was determined that high nitrogen doses caused a decrease in 1000 grain weight. In this study, nitrogen fertilization and variety selection were found to be important on yield in Adana conditions.