Enhancement Picual Olive Trees Productivity by Using Potassium Citrate with Gibberellic Acid

Abstract

This experiment was carried out during 2018 and 2019 seasons on 38 years old Picual olive trees which planted in a private orchard located at El Khatatbah district, El Monufia governorate, Egypt; and that in order to study the spraying effect of the Potassium citrate (K3C6H5O7) and Gibberellic acids – GA3 (C19H22O6) on the olive fruit quality, yield, oil content and its leaves mineral content. Olive trees were sprayed twice a year, once in February and the other in May, at two concentrations of each, 1 – 2 % of Potassium citrate and 10 – 20 ppm of GA3. Generally, spraying both compounds, regardless the concentration, on olive trees recorded a significant effect on all studied parameters in this study. But the most important thing that can be noticed from the results obtained, is that the use of the highest concentration of Gibberellic acid had the strongest significant effect on increasing the yield of trees, while the use of the same concentration combined with the highest concentration of potassium citrate had the highest effect in increasing the oil accumulation percentage of the olive fruits.