Roula Bayerli ^(1)*

(1).  Department of Horticulture Science, Faculty of Agriculture, Damascus University, Syria.

(*Corresponding Author: Dr. Roula Bayerli. E-Mail:  roula.bayerli@damascusuniversity.edu.sy).

Received: 10/10/2023         Accepted: 10/12/2023

Abstract: 

The present study was carried out in Homs province, Syria, during the period from 2021-2022, to study the effect of treatment with humic acid (0, 5, 10 g/l), and foliar application with yeast extract (0, 3, 6 g/l) and their interactions on growth and productivity of potato plant cv. Sponta. The chemical analysis was carried out in the laboratories of Faculty of Agriculture, Damascus University. The study contains 9 treatments and the data was calculated using Simple Random Design. The combination treatment of humic acid (10 g/l) and yest (6 g/l) resulted in the best morphological parameters (57.06 cm, 3.50, 150.54 cm² for plant height, stem number/ plant and leaf area respectively), physiological parameters (22.24 %, 17.25 %, 8.77 % for dry matter, starch, total soluble solids, respectively), and productivity parameters (3.03, 225.07 g, 30.32 ton/ hectare for tubers number/ plant, tubers weight, productivity). The lowest values for all studied parameters, however, were obtained in control plants.

Key words: Potato, Sponta, Humic Acid, Yeast, Growth, Productivity.

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