Raed Jafar* (1) , Fahed Sahuni (2), Ali Deeb (1)

(1). Department of Horticulture, Faculty of Agriculture, Tishreen University, Lattakia, Syria. (2). Department of Horticulture, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(*Corresponding author: Raed Jafar. E-Mail: Raed.jafar91@gmail.com)

Received:28/9/2020 Accepted:25/10/2020

Abstract

This study was conducted during 2019 on orange trees navel variety located in Al_Shir village in Lattakia, in aim of studying the effect of growth regulator naphthalene acetic acid (NAA) at (10, 20 PPM) concentrations and boron element(borax) at concentrations (0.05, 0.1%) singly and mixed, on physical and chemical fruits properties, The experiment was designed according to a complete randomized design with 7 treatments and 5 replicates for each treatment, The results showed that All applied treatments resulted in improve the fruits’ quality by improving some physical characteristics such as skin thickness (6.16 mm at 0.05% boron) and fruit shape, in addition to improving the juice content chemically as increasing soluble solids percentage (12.37% at 20 PPM NAA) and vitamin C (48.624 mg / 100 mL juice at 20 PPM of NAA), in addition, to increase in the ripeness factor value(14.502 at concentration of 10 PPM from NAA).

Keywords : Washington navel, Naphthalene Acetic Acid (NAA), Boron, Physical And Chemical Properties.

Full paper in Arabic: PDF