تأثير الأحماض الدبالية والتسميد المعدني في إنتاجية طرز بيئية مختلفة من حبة .Nigella sativa L البركة ) ) في محافظة الحسكة

Abstract

Abstract

To evaluate the effect of inorganic and organic (humic acid) fertilizers on the yield and quality traits of three different black cumin ecotypes(Syrian, Iranian, Iraqi). A field. experiment was carried out at Al-Ghazal area in Al-Hassaka Governorate. The aim of the study focused on determining the optimal fertilizer rate for the cultivation of black cumin and determining the most responsive and productive ecotypes in the targeted environment, where eight fertilizer treatments have been applied. The experiment was laid according to the complete randomized block design (RCBD), with the arrangement of split-split plots, with three replications. The fertilization treatment (4.5 1.. ha humic acid)+(180 P2O5 +200 N kg. ha¹ recorded the highest values of plant height, number of main branches per plant, number of capsules per plant, number of seeds per capsule, seed weight, seed yield, biological yield and harvest index, and essential oil yield (62.116 cm, 8,368 branches. Plant, 26,342 ca. plant, 90,509 seeds, capsule, 10,238 g. plant-1, 150.70 g. m², 229.79 g.m-², 65.07%, 0.150 ml. plant respectivly) compased with control treatment. It has been also noticed that the Iranian ecotype supasssd in all the morphological traits compared with the Syrian and Iraqi types, as the Syrian ecotype supasssd in the percentage of essential oil over the other investigated ecotypes. As for the essential oil yield, the highest significant was in Syrian types (1.3230%) while it was the lowest in Iraqi types (1.1348%). The amount of Thymoquinone in the oil increased in all the applied fertilizer treatments, and was distinguished when fertilizing with the two treatments (4.5 liters, ha¹ humic acid) + (180 P2O5+200 N) kg. ha¹, and (3 L. ha humic acid) + (140 P2O5 + 160 N kg. ha).

It is recommended to cultivate the Iranian ecotype and apply (4.5 liters. ha humic acid) + (180 P2O5 + 200 N kg. ha').black cumin ecotypes vary in their productivity under the conditions of Al-Hasakah Governorate, and that the Iranian ecotype appears to be one of the best ecotype that can be cultivated to obtair the highest seed yield and oil percentage.