EFFECT AZOTOBACTER, MYCORRHIZAE, VERMICOMPOST, AND SPRAY NPK ON QUALITY CHARACTERISTICS OF C.V HELAWANI GRAPE.

Abstract

The experiment was carried out in one of private orchards of Diyala during two seasons (2022- 2023) on grape vines at 15 years old, to study effect of adding bacterial and fungal biofertilizers, vermicompost fertilizer, and foliar applied mineral fertilizer Nitrogen, phosphorus and potassium (NPK) on growth and production characteristics on cv. Helwani grape vines. Experiment was carried out in a randomized complete block design (RCBD) arranged as a split plot with three factors with Three replicates, experimental unit included one tree with the total number of 72 trees for the experiment. First factor included the addition of biofertilizers which included: without inoculation (M0), inoculation with 400 g of fungi (M1), inoculation with 200 g of bacterial (M2) and inoculation with both bacteria and fungi (M3). Second factor included the addition of organic fertilizer with three treatments, without addition (N0), adding 5 kg/ tree^-1 (N1) and adding 7 kg/tree^-1 (N2), and the third factor included foliar applied mineral fertilizer NPK as two treatments, without spraying (F0) and Spraying with 2.5 ml L^-1 of fertilizer (F1). Four foliar applications were applied at 30-day intervals when leaves reached full expansion. Results showed significant impact by the triple interaction treatment M3N2F1 on the treats quality by TSS, total acidity, anthocyanin, carbohydrate and nitrogen in the cans by giving it the highest values ​​for these treats, 18.25%, 19.90%, 0.461%, 0.485%, 98.41, 92.24 mg100g^-1, 19.37%, 22.13% and 0.048%, 0.066% for both seasons respectively.