Response vegetative growth of three grape cultivars (Vitis vinifera L.) to foliar application of GA3 and NAUTA fertilizer

Abstract

This study was carried out in the vineyard of the Department of Horticulture and Landscape Design, College of Agriculture and Forestry at the University of Mosul, Mosul City, Iraq. During the growing season 2022 to study the effect of foliar fertilization of Nauta fertilizer containing amino acids and seaweed extracts and foliar spraying with gibberellic acid (GA3) on three varieties of table grapes, Halawani, Kamali and Khalili and the extent of their impact on vegetative growth. Foliar spraying of organic fertilizer NAUTA with 0, 250 and 500 mg l-1 and spraying with a solution of gibberellic acid with 0, 50 and 100 mg l-1. The most important results obtained that vegetative growth differed according to the varieties under this study, Foliar application of NAUTA organic fertilizer, especially at a concentration of 250 mg l-1, led to a significant increase in the rate of height and diameter of the main stem, the leaf area , the leaf area of the seedling, the concentration of chlorophyll in the leaves. Spraying with 100mg l-1 of gibberellic acid, led to a significant increase in the average height and diameter of the main stem, leaf area, the leaf area of the seedling, protein. The results of the triple interaction between the levels of the studied factors showed a significant effect on vegetative growth.