Response of Black Cumin ( Nigella sativa L.) to Different Seed Rates Growth, Yield Components and Essential Oil Content

摘要

This research was carried out to determine some important agronomical properties of the black cumin in Van, Turkey. The experiments were designed in a Randomized Complete Block Design with three replications. In the study, four different seed rates 5, 10, 15 and 20 kg ha^-1 were applied. The seeds were sown as main crop in 3 April and 10 May in 2001 and 2002, respectively in 25 cm apart and given 30 and 60 kg ha^-1 of N and P₂O₅, respectively. Data were tabulated on mean plant height, the number of branch, the number of umbrella, the number of seeds in the umbrella, thousand-seed weight, seed yield (kg ha^-1), essential oil content (%) and essential oil yield (kg ha^-1) in both years. It was showed that the analyzed features were generally affected by seed rate applications. Averaged over years, the highest seed yield 701.2 kg ha^-1 and essential oil yield 3.5 kg ha^-1 obtained from the 15 kg ha^-1 seed rate application. It was concluded that the 15 kg ha^-1 application were considered the optimum seed rate, having high essential oil and seed yield in the black cumin.