Effect of different fertilizer applications on the yield and quality characteristics of sunflower (Helianthus annuus L.)

This research was conducted in the farmer's field in Kılavuzlu village of Süleymanpaşa district, Tekirdağ province in 2023. The study was conducted at "randomized complete block with split plot" design with 4 replications. In the study, it was aimed to determine the effects of 3 different fertilizer types at 4 different doses on the yield and quality characteristics of sunflower. In the study, P64LP130 oil sunflower variety of Pioneer company was used as material and 0, 10, 20 and 40 kg da-1 doses of Ammonium Sulphate and Diammonium Phosphate fertilizer types and 0, 2, 4 and 8 lt/da of Ammonium Thiosulphate fertilizer were used as fertilizer. As a result of the research, the effect of 20 kg Diammonium Phosphate (NH4)2HPO4 %18 N - %46 P application was found significant. In the experiment, seed yields varied between 172.25 - 267.00 kg ha-1. The highest seed and oil yields were 267.00 kg da-1 and 123 kg da-1 and DAP at a dose of 20 kg da-1 belongs to (NH4)2HPO4 %18 N - %46 P.