INFLUENCE OF FOLIAR SPRAY OF SALICYLIC ACID, FULVIC ACID AND BIO-FERTILIZER ON GROWTH, YIELD AND QUALITY OF GRAPEVINE CV. TAIFI

Abstract

The experiment was carried out at the private vineyard located in Duhok Governorate, Bare-Buhar village Kurdistan region-Iraq, during growing season (2024) to investigate the influence of foliar spraying of three levels, (0, 200 and 400 mg.L-1) Salicylic acid, three levels (0,3 and 6 mg.L-1) of Fulvic acid, spraying was conducted at April and May and Bio-fertilizer (mycorrhiza) applied by soil at three amounts (0, 50 and 100 g.vine-1), once per season (before bud burst) and their interaction on green parts, yield, physical , chemical characteristics on Taifi grapevine cv. irrigated with a drip irrigation. The vines were 10 years old, trained with T-Trills, and vines pruned in the second week of March by leaving four renewal spurs, each with two eyes, and eight fruiting canes, each with seven eyes. The inter-row spacing of these vines was 2.5 × 2.5 m. There were 81 experimental units in all due to the three replications and 27 treatments in the experiment. One vine was used as the experimental unit of a factorial study carried out in an RCBD with three replications. The obtained results indicated that every trait like total chlorophyll, leaf area, number of clusters per vine-1 and yield per vine-1 as well as vitamin C in berries juice were significantly increased as compared with control, while Nitrate % in berries juice was reduced by all treatments as compared with control. The combination between high concentrations of Salicylic acid, Fulvic acid and Bio-fertilizer were improved all traits in compares with control.