Amani Berawi *(1), Abd Al-Gani Khorchid (2), Mahammad Manhal Al-Zoubi (3), Ayham Asbah(1), Saher Al-Bakeer (4)
(1) Scientific Agricultural Research Center in Hama, Hama, Syria.
(2) Department of soil and soil reclamation, Faculty of Agriculture, Aleppo University, Aleppo, Syria.
(3) Administration of Natural Resources Research, Damascus, Syria.
(4) Department of horticulture, Faculty of Agriculture, Aleppo University, Aleppo, Syria.
(*corresponding author: Amani Berawi. E-mail : eng.amani199001@gmail.com)
Abstract:
To study the effect of adding soluble fertilizers and Foliar Application by Micronutrients in determining the optimum rate of soluble fertilizers according to the Fertigation and the effect of these fertilizers on the production of olive tree and their content of oil. The experiment was carried out in an olive field of the General Commission for Scientific Agricultural Research(GCSAR) (Hama Research Center) during the two seasons (2016 – 2017). The trees of the experiment were selected to be homogeneous in growth and age. The experiment included the application of 5 levels of fertilizer soluble (S0, S1, S2, S3, S4) (0, 0.5, 1, 1.5, and 2) kg /tree respectively, according to the Fertigation. The soluble fertilizers were added during three stages of the growth Plant, where the high phosphorus composition was used in the first phase (in mid-March), the balanced composition of the contract period and the beginning of fruit growth, the high potassium composition at the fruit growth stage, and the Foliar Application with a balanced compound of the microelements necessary with the concentration of the spray liquid (0.5 g /L ) According to different dates: one spray F1 (Before inflorescence appearance), twice spray applications F2 (Before inflorescence appearance and after fruit set) or three times in season F3 (Before inflorescence appearance, after fruit set and before one month of harvest date), in addition to the control without spraying F0, the experiment was designed in a way Split plots and three replicates per treatment. The results of the study showed that the response of olive trees(Kaisi cv.) was significant for soluble fertilizers and Foliar Application by Micronutrients compared to the control (without fertilization). The best treatment for productivity was (S3F2) fertilization (1.5 kg fertilizer / tree) and twice spray from Micronutrients to three spray from Micronutrients F3 in some specifications, Where productivity reached the first season (32.67 kg / tree) and in the second season (36.55 kg / tree) at the treatment (S3F3). The addition of (2 kg fertilizer soluble/ tree) and supported by two spray from Micronutrients gave the highest percentage of oil in the first and second seasons (20.94, and 21.87%) respectively.
Keywords: olive, solubility fertilizers, Fertigation, micro-elements, dates of foliar spray Kaisi cultivar.

Full paper in Arabic: pdf