Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : EFFECT OF SILICON IN ALLEVIATING DROUGHT STRESS IN (NIGELLA SATIVA L.) AND ITS RELEVANCE ON OILS PRODUCTION

Auteur : Ashram, Arwa Mohammed

Université de soutenance : King Abdulaziz University

Grade : Master Thesis 2020

Résumé
Drought is the most significant abiotic factor that limits growth, harms growth and crop production. Silicon is the second element mineral and it has shown to improve soil properties under stress conditions. This study shows the effect of silicon application under normal conditions, and different levels of drought stress (75%, 50%, and 25% FC) on soil physical and chemical properties in addition to minerals availability. The results of the study indicated that, silicon treatments decreased soil pH value compare to silicon un-treatment under all studied water levels. On another hand, CE and OM significantly enhanced in response to Si treatment under most of the studied water levels. Generally, the concentration of soil mineral elements (P, K, Ca, Mg, and Fe) increased due to Si treatment. However, this induction in minerals concentration was more pronounced at higher water levels (100%, 75% FC) in case of K, Ca and Fe. While, the enhancement in P and Mg concentration after Si treatment was much remarkable under higher stress conditions (50%, 25% FC).

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