This study was conducted during 2016 & 2017 seasons to elucidate the impact of using nano-micronutrients (Zn, Fe, Mn and Cu) at 0.0125 to 0.1 % versus normal micronutrients in the form of chelates at 0.025 to 0.2 % on growth, palm nutritional status, yield and fruit quality of Ferehy date palms grown under Siwa conditions.
Treating the palms with these micronutrients via nano or chelated form at the previous concentrations had an announced promotion on all aspects of growth, palm nutritional status, yield and fruit quality relative to the control treatment. Using nano-micronutrients at the lower concentrations namely 0.0125 and 0.025 % substantially were favorable than using the higher concentrations of chelated forms namely 0.1 and 0.2 % on stimulating all parameters. Using nano-micronutrients at concentrations higher than 0.0125 failed to show measurable effects.
The best results with regard to yield and fruit quality of Ferehy date palms grown under Siwa region conditions were obtained due to spraying the palms three times with Zn, Fe, Mn and Cu via nano system at 0.0125 %.