Diyarbakır Sulu Koşullarda Farklı Azot ve Fosfor Seviyelerinin Bazı Aspir Çeşitlerinde Taç Yaprak Verimi ve Bazı Bitkisel Parametrelerine Etkisi

In order to determine the effects of different nitrogen and phosphorus levels on the petal yield and some vegetative parameters of some safflower cultivars, the study was established in Diyarbakir irrigated conditions in the winter season of Dicle University Faculty of Agriculture in the 2019-2020 growing season. The experiment was carried out in according to the split-split plots experimental design in randomized blocks with four replications, and two safflower cultivars (Safir, Dincer), three phosphorus doses (0, 3, 6 kg P2O5/da) and four nitrogen doses (0, 5, 10, 15 kg N/da) was applied. Plant height, number of side branches, number of heads, diameter of the heads, main stem diameter and petal yield were investigated. As a result of the findings, it was determined that the nitrogen fertilizer doses affected plant height, number of side branches, number of heads, diameter of the head, main stem diameter and petal yield statistically significantly. Plant height 73.76-93.24 cm, number of side branches 4.36 -5.53 pieces/plant, number of heads 10.18 -16.82 pieces/plant, diameter of the head 24.38-26.43 mm, main stem diameter was found to vary between 5.82-6.88 mm. The highest petal yield was obtained from the application of 15 kg N/da dose of 7.06 kg/da, and the lowest from 0 kg N/da dose application as 4.88 kg/da. In parallel with the increase in the applied doses, it was determined that the yield elements increased positively.