Kholod Ahmad Abbas1, Georges Makhoul Makhoul1, Faisal Wajih Dway1, and Mohammad Naddaf2

1 Department of Horticulture, Faculty of Agriculture, Lattakia University, Syria.
2 Department of Food Science, Faculty of Agriculture, Lattakia University, Syria.
(*Corresponding author: Kholod Ahmad Abbas, Email: kholod.abbas7@gmail.com )

Received: 5/ 5/ 2025     Accepted: 25/ 6/ 2025

Abstract

The experiment was carried out during three seasons (2020,2021,2022) on Al- khdery olive trees,30 years old in Rwayst al-hersh village in Lattakia. The aim of research is to study the effect of irrigation and organic fertilization on productive and qualitative characteristics of olive oil cv”Alkhdery”. Two levels of organic fertilizer 5 and 7 kg\ tree, were added in November, and irrigation water was used three times at a fixed irrigation water rate at 800 liters\ tree\irrigation. A completely randomized design was adopted. The experiment included 12 treatments and each treatment had 3 replications. The results were analyzed using Genestat 12 program by calculating the least significant difference level of 5%. The results showed that the T12 treatment (7 kg\tree organic fertilizer+ 3 batches irrigations) was superior to the three- year average in oil ratio 28.78%, and in the average oil quantity 10.964 kg/tree. The chemical analysis showed that the refractive index for all studied treatments was (1.4677-1.4705) at 20 c°, which is within the Syrian Standard Specification 182 ,2000. Also, treatment with 7 kg/tree organic fertilizer and 3 times irrigation was superior to the three- year average in acidity 0.66%. The peroxide index was within the internationally permissible limits and within the Syrian Standard Specifications and  therefore the oil is an extra oil.

Keywords: olive, organic fertilizer, irrigation, fertilization, oil ratio, quality indicators.

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