Effect of Soluble Fertilizers Addition on the Nutrients ‎Absorption and Productivity of Olive Tree (Kaisi cv.) ‎

Amani Berawi*(1) Abd Al-Gani Khorchid(2) Mahammad Manhal Al-Zoubi(3) Ayham Asbah(1) and Saher Al-Bakeer(4)

(1). Scientific Agricultural Research Center in Hama, (GCSAR). Damascus, Syria.

(2). Department of Soil and Soil Reclamation, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(3). General Commission for Scientific Agricultural Research (GCSAR). Damascus, Syria.

(5). Department of Horticulture, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(*Corresponding author: Eng. Amani Berawi. E-Mail: eng.amani199001@gmail.com).

Received: 13/02/2019                               Accepted: 10/05/2019

Abstract

The experiment was carried out in an olive orchard, Hama Research Center, General Commission for Scientific Agricultural Research (GCSAR), during 2016 and 2017 seasons in order to study the effect adding soluble fertilizers on the absorption of nutrients and the productivity of the olive tree (Kaisi cv.) and content of oil in fruits. The trees of the experiment were selected to be homogeneous in growth and age as possible. Soluble fertilizers were added according to the following treatments: S0 (kg/tree), S1 (0.5 kg/tree), S2 (1 kg/tree), S3 (1.5 kg/tree) and S4 (2 kg/tree) in three addition times during the year as follow: the high phosphorus composition in the first phase (from mid-March to the end of April), the balanced composition at the fruit setting and the beginning of fruit growth, and the high potassium composition at the fruit growth until maturity. The experiment was designed according to randomized complete block design, with three replicates for each treatment. The results showed that the greater the amount of soluble fertilizer added higher content of the soil and plant nutrients NPK and became more available to the plant, and the superiority of treatment S3 on the other of treatments in terms of productivity and the absence of a significant difference with the treatment S4 in terms of the oil percentage which reached 20.15%.

Key words: Olive, Soluble fertilizers, Fertigation, Kaisi cultivar.

Full paper in Arabic: PDF