Özet:

The aim of this study is to determine the effects of foliar mineral (KNO3+H3BO3+ZnSO4 and urea+MgSO4) and organomineral (Raykat Growth, Raykat Start and Phytomare) fertilizers with and without irrigation applications on the yield per tree, fruit quality criteria with olive oil content before and after flowering periods of ‘Gemlik’ olive cultivar. The application of fertilization and irrigation techniques was found to be effective in enhancing the yield per tree and the weight of 100 grains. Additionally, irrigation was found to be effective in improving the fruit flesh-to-seed ratio. However, it was determined that different application periods did not have a significant impact on certain parameters. Among the various treatments applied, the highest yield per tree of 49.7 kg was achieved with the irrigated Raykat Growth organomineral fertilizer application. On the other hand, the highest weight of 100 grains, at 402.7g per fruit, was obtained with the combination of irrigated and Urea+MgSO4 fertilizer application. The study revealed that both irrigation and fertilization were effective in the analysis of total oil, and the oil rate was higher in non-irrigated trees. However, the oil content was found to increase with higher yield under irrigated conditions, as the yield value per tree was greater when irrigated. The total oil yield ranged from 7.29% to 24.8%, with the highest value (24.8%) obtained from the Raykat Growth organomineral fertilizer treatment. Analysis of the oil samples revealed the presence of eleven different fatty acids, including myristic, palmitic, palmitoleic, heptadeconaic, stearic, oleic, linoleic, linolenic, Cis-8.11.14-Eicosatrien, trichonic, and lignoceric acids.

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