Determination of the effect of sowing time and irrigation on yield and quality characteristics in black cumin (Nigella sativa L.)

Black seed herb used in our country is a spice plant, is a single-year plant. This study was conducted to determine the effect of four different sowing times (15 November, 15 December, 15 February, 15 March) and three different irrigation times (control, bolting, flowering period) on seed quality and agronomical characters on black seed (Nigella Sativa L.). The experiment was set out in the randomized block in split plot desing in 2017-2018 growing season in Diyarbakir. In the study, plant height, number of branches per plant, number of seeds per capsule, number of seeds per capsule, thousand seed weight, seed yield, biological yield, fixed oil ratio, fixed oil yield, fatty acid composition were examined. It was determined that the effect of sowing times on plant height, number of branches per plant, number of capsules per plant, biological yield, seed yield and fixed oil yield were significant. Plant height 67.66 cm - 37.74 cm, plant number 4.41-5.64, number of capsules per plant 8.11-11.53, biological yield per plant 2.83-4.40, seed yield was 19.04 kg/da -162.00 kg/da. Fixed oil yield was 6.12 kg/da - 48.94 kg/da. It was determined that sowing time × irrigation time had significant effects on plant height, number of seeds per capsule and 1000 grains. Sowing time × irrigation time interction for plant height was significant, and ranged from 37.27 cm to 74.93 cm. the effect of irrigation time on the number of seeds per capsule and 1000 seed weight was significant, and 71.87 to 102.90, 1000 seed weight was 2.76 g 2.12 g. The effect of sowing time × irrigation time and sowing times on fixed oil ratio was no significant.