Ali Hatami - Ph.D Student of Horticultural Science, Department of Horticultural Science, Jahrom Branch, Islamic Azad University, Jahrom, Iran
Abdolhossein Abootalebi Jahromi - Associate Professor of Horticulture, Jahrom Branch, Islamic Azad University, Jahrom, Iran
Abdolkarim Ejraei - Department of Horticulture, Jahrom Azad University, Jahrom, iran
Abdol Hossein Mohammadi Jahromi - Department of Agriculture, Jahrom Branch, Islamic Azad University, Jahrom, Iran.
Hamed Hassanzadeh Khankahdani - Horticulture Crops Research Department, Hormozgan Agricultural and Natural Resources Research and Education Center, AREEO, Bandar Abbas, Iran

Due to the calcareous nature of most soils in areas under date cultivation, this study was conducted to improve the quality and quantity of date fruits in Zahidi cultivar using the foliar applications of organic matters and micronutrients at two stages of date growth. For this purpose, an experiment was conducted to evaluate the effects of foliar applications of organic matters and micronutrients on contents and properties of biochemical compounds and minerals in Zahidi date fruit. The study was performed as a randomized complete block design with ۱۱ treatments in three replications on ۳۳ date palms for two consecutive years. The treatments were applied in two stages (at the beginning and end of the Kimri stage) on fruits and upper leaves. Treatments included amino acids, Aminabon ۵۰ (۰.۵ and ۰.۱ g L-۱), seaweed (۰.۲۵ and ۰.۵ g L-۱), micronutrients (۰.۱ and ۱.۵ g L-۱), and four combined treatments obtained from different concentrations of amino acids, seaweed, and micronutrients. Spraying with distilled water served as the control treatment. The results showed that the treatments had a significant effect on all studied traits. The highest content of copper was observed in response to amino acid + micronutrients (۱.۶۳ mg kg-۱). The effects of amino acid + seaweed + micronutrients on the other traits were observed in the highest statistical class. In general, the latter combined treatment was the most efficient with the lowest content of soluble tannin (۲۶.۴۶ mg g-۱) compared to the control (۳۲.۱۲ mg g-۱) and to the other treatments.

Amino acid, seaweed, Iron, Zinc, manganese, Foliar application time