Response of Three Black Seed Cultivates to Humic Acid Fertilizer in Sulaimani Region, Iraq

Document Type : Research Paper

Author

University staff

Abstract
A field experiment was carried out in Qlyassan, Agricultural Research Station, College of Agricultural Engineering Sciences, University of Sulaimani. To study the role of humic acid in improving some trials of yield component of black seed cultivates under rainfall condition during seasons of 2021-2022 and 2022-2023, under semi-arid conditions by using factorial completely randomized block design (CRBD) with three replications. The study was consisting of two factors, first factor includes three black seed (NARC-Pakistan, Raw India and Bengali) cultivates, and second factor include three different concentrations {0 ml.L-1 (control), 5ml.L-1 and 10ml.L-1} of humic acid fertilizer. The results showed that productive season 2022-2023 exhibited superiority in most studied traits which include vegetative and yield components traits. Although there was a factor of cultivates, but there were no significant differences for the studied traits except two or three traits, and the reason is may be due to the fact that there was intense competition between the varieties. While for foliar application, results showed that humic acid applications have superiority on control especially the concentrate of 10ml.L-1 for these traits; Capsules.m-2, Capsules.plant-1, Seeds.capsule-1, weight of seeds. plant-1, 1000 seed weight (g) and total seed weight kg. ha-1 by 30.890%, 37.025%, 20.949%, 31.887%, 20.667%, 24.523% for first season, and 23.819%, 33.599%, 10.249%, 26.093%, 21.147%, 21.133% for second season respectively. For the oil content, which was one of the most important traits intended in the study, the high value obtain by Pakistani variety with 27.402% between cultivates, while for humic acid application in the experiment and its effect on oil content, the dose with 10 ml/ L superior on control by 19.577% and 23.897% for the two years respectively, while between years, the second season superior first season by 9.434%.

Keywords

Subjects
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