Potassium and micronutrient fertilizer addition in a mock aquaponic system for drug-type <i>Cannabis sativa</i> L. cultivation

Cultivating drug-type Cannabis sativa L. with aquaponics could reduce mineral fertilizer use; however, its nutrient solution is often unbalanced and low in K + micronutrients. It unknown if a fertilizer, micronutrient or both, would improve C. production aquaponic solution, as optimal concentrations the root zone for during flowering stage have not been investigated. To determine effects of adding to production, we grew five based solutions: (control plants) (15 mg·L ?1 ); added micronutrients (Fe 3+ , Cu 2+ Mn B Mo Zn three (75, 113, 150 ) stage. evaluate impact additional on measured growth (vegetative parameters weight), physiology (leaf gas exchange), leaf nutrition content, yield (inflorescence weight). Adding at 75 113 increased harvest index (marketable inflorescence shoot weight) by 16% 22% compared control, respectively. dry apical total also linearly increasing concentration. Alternatively, plants grown control (suboptimal conditions) had no difference physiological supplemented nutrients. Our study suggests that mitigates from causing deficiency.