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This study aimed to reveal the effect of different genotypes (population and variety) on yield, yield components and quality parameters of black cumin (Nigella sativa L.). The experiment was carried out in the Aegean Region of Turkey in two vegetation seasons of 2017 and 2018. In the study, four black cumin populations (Uşak, Hatay, Diyarbakır and Burdur) obtained from Turkey’s different regions as well as Çameli variety were used. The plant materials had been cultivated in a randomized complete block design with three replications. Results showed that there were statistically significant differences among genotypes in terms of all parameters examined except for fixed oil ratio. The mean seed yield varied between 0.34-0.86 t ha-1 in 2017 and 0.10-0.31 t ha-1 in 2018. The seed and fixed oil yields were higher for Çameli, Hatay and Diyarbakır genotypes. The percentages of linoleic and oleic acid of genotypes varied in a range of 55.85-57.67% and 21.05-22.59%, respectively. There was no significant difference among genotypes in terms of linoleic acid content. However, a significant difference was found among genotypes in terms of oleic acid content and the oleic acid content was higher in the black cumin populations than the Çameli variety. [ABSTRACT FROM AUTHOR]

Abstract. This study aimed to reveal the effect of different levels of leonardite and nitrogen fertilizer applied to the soil on seed yield and some quality parameters of black cumin (Nigella sativa L.). The study was carried out in the Southeastern Anatolia Region of Turkey between the years 2016-2018. In the study, 4 different doses of leonardite and nitrogen fertilizer were administered. In the study, the highest plant height and number of branches were found in L2N90, the highest number of capsules was found in L2N60, and the highest number of seed per capsule was found in L2N60 and L3N60. As a result of the study, the highest seed yield was obtained from L2 and L3 doses of leonardite and from N60 dose of nitrogen. It was determined that the fixed oil ratio, essential oil ratio contained in the black cumin seeds, and essential oil components parallel with the increase in leonardite and nitrogen doses. It was concluded that leonardite, a soil conditioner, could be used in black cumin cultivation under semi-arid climate conditions and that 2000 kg ha-1 leonardite and 60 kg ha-1 nitrogen could be applied to improve the yield and quality of black cumin. [ABSTRACT FROM AUTHOR]

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