Determination of The Effects of Chemical, Organic and Organomineral Fertilizer Applications on Important Quality Characteristics in Confectionery Sunflower

In this trial, the aim was to determine the effects of chemical, organic, and organomineral fertilizer applications on the quality characteristics of confectionery sunflower under Kahramanmaraş conditions. The study was conducted in the trial field of Kahramanmaraş, in 2021 and 2022. According to the results obtained from the research, all the differences between the fertilizer applications for the examined properties, except linoleic acid and iodine value, were statistically significant. The results indicated that the oil yield of the fertilizer applications ranged between 548.70-1073.25 kg ha-1, protein yield between 196.81-414.82 kg ha-1, oleic acid content between 49.194%-53.653%, linoleic acid content between 32.732%-40.386%, palmitoleic acid content between 0.157% and 1.076% and linolenic acid content between 0.124%-0.325%. Protein yield was highest in the vermicompost (1 t ha-1) + chemical fertilizer (90 kg ha-1 N and 50 kg ha-1 P2O5) and cattle manure (1 t ha-1) + chemical fertilizer (90 kg ha-1 N and 50 kg ha-1 P2O5) and vermicompost 20 t ha-1 applications (414.82, 411.48 kg ha-1 and 392.33 kg ha-1, respectively). The oil yield was the highest with 1073.25 kg ha-1 in vermicompost 20 t ha-1 application, while protein yield (392.33 kg ha-1), oleic acid ratio (53.653%), oleic acid/linoleic acid ratio (1.46%) and unsaturated fatty acids/saturated fatty acids ratio (10.53%) were found the highest, while palmitic acid ratio (5.754%), palmitoleic acid ratio (0.157%), heptadecanoic acid ratio (0.026%) and behenic acid ratio (0.470%) were the lowest. According to the results obtained, vermicompost 20 t ha-1 organic fertilizer applications are recommended for confectionery sunflowers because they increase important quality criteria such as oil yield, protein yield, oleic acid content, O/L ratio, and U/S ratio.