Kinana Omran(1) , Ali Elkhateeb(2) and Mohammad Battha(3)
(1) . Faculty of Science, Damascus University, Damascus, Syria.
(2) . Faculty of Agriculture, Damascus University, Damascus, Syria.
(3). General Commission Agriculture Scientific Research, Lattakia, Syria.
(*Corresponding author: KinanaOmran.Email:KINANA6@yahoo.com).
Received: 2/01/2023 Accepted: 23/02/2023
Abstract:
This research was carried out in two consecutive seasons (2018/2019) on Valencia trees grown at the Siano Research Station of the General Authority for Agricultural Research. Organic fertilizers from different sources were used with mineral fertilizers, humic acids,and foliar spraying with some microelements(boron, zinc, manganese, iron), and their effect on production and some morphological traits was followed up. We had twelve treatments distributed on the basis of following up the effect of each type of fertilizer individually or in interaction with a mixture of organic fertilizers (dung of cows, sheep and poultry).The results showed alternating superiority between treatment F(a mixture of organic fertilizers)and treatment G(a mixture of organic fertilizers with NPK)) with regard to the studied indicators, where treatment (F) and treatment (G) were significantly superior in relation to the number of vegetative branches during the two growing seasons in the study period with an average of (8.3 branche),while treatment (G) was significantly superior in relation to the length of new developing branches and outwardly outperformed by primitive nodes (91 7 %),with an average productivity of (93.9 kg/tree), and an average fruit weight of (238.5 g), while it returned and significantly outperformed all treatments with regard to an average fruit diameter of (7.8 cm).Thus, fertilizer treatments had a significant positive effect compared to the control in most of the studied indicators.
Keywords: Valencia Orange , Organic fertilizers ,mineral fertilizer ,vegetative growth , productivity.
Full paper in Arabic: pdf