"Effect of Nitrogen Fertilization and Gibberellic Acid Spray on Seed Yield and Oil content of Black Seed (Nigella sativa L.) "

Abdulsalam Abdulrahman Rasool , Almas Galal Muhamad rashid
Field Crops Department, Faculty of Agricultural Sciences, University of Sulaimani

This study was carried out to evaluate the seed yield and oil content of black
cumin, at Qlyasan Research Station, Faculty of Agricultural Sciences, Sulaimani
University [35 ̊, 34′′ 307′ N; 45 ̊ 21′ 992′′ E with an altitude of 765 masl ], during
winter season 2008-2009. Factorial experiment including four rates of Nitrogen fertilizer
(0, 20, 40, 60) kg ha-1and GA3 (0, 50, 100) ppm pre –flowering spray, conducted in
Completely Randomized Block Design (CRBD) with 4 replications. The application of
nitrogen in different levels showed significant values in most of the reproductive traits,
the level of 20 kg N ha-1 showed the superiorities as compared to all other levels.
Gibberellic acid spray caused significant increase in all yield characteristics except No.
of capsules plant-1, weight of 1000 seed and biological weight, while oil % was superior
when no GA3 was added. The interaction of 20 kg N ha-1 with 50ppm GA3
predominated in both seed and oil yield.

Key words: Medicinal plant, Black cumin, Phytohormons, Nitrogen application


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