Effect of foliar application with zinc and auxin on some morphological, physiological and productivity parameters of potato plant cv. Sponta

Abstract

The present study was carried out in Homs province, Syria, during the period from 2020-2021, to study the effect of foliar application with zinc (0, 0.5, 1 g/l), and auxin IAA (0, 25, 50 ppm) 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 zinc (1 g/l) and IAA (50 ppm) resulted in the best morphological parameters (59.09 cm, 5.85, 168.84 cm² for plant height, stem number/ plant and leaf area respectively), physiological parameters (25.41 %, 18.49 %, 9.95 % for dry matter, starch, total soluble solids, respectively), and productivity parameters (6.38, 242.57 g, 36.95 ton/ hectare for tubers number/ plant, tubers weight, productivity). The lowest values for all studied parameters, however, were obtained in control plants.