Role of Bio-Fertilization on the Soil pH, Available NPK on Soil and Petioles of Leaves of Yong Vines (Vitis vinifera L.) cvs. Thompson Seedless and Olivetti Noier

This study was conducted in the grape vineyard of Department of Horticulture and landscape design/College of Agriculture and Forestry/University of Mosul on Thompson Seedless and Olivette noir grape cultivars ( Vitis vinifera L.) at three years old, by using Split-plot in Randomized Complete Block Design (RCBD) with three factors, three replications and two vines for each experimental unit, First factor was grape cultivars (Thompson Seedless and Olivette noir), second factor was inoculation with Bacillus subtilis bacteria with three levels(0, 20 and 40 g vine -1 ) third factor was Trichoderma harzianum fungi with three levels (0, 20 and 40 g vine -1 ) too, in addition to control treatment (without inoculation), as the inoculation with the bacterial and fungus was carried out once on a season according to the treatments in 18 March. To study the effect of each factor separately and the interactions between factors. These fertilizers were used to improving the soil status and the concentrations of NPK in the leaves petioles. The obtained results indicated that application of 40g vine -1 of Bacillus subtilis and Trichoderma harzianum individually or interaction with each other caused a significant decrease in the soil pH and increased the available concentrations of NPK in the soil and leaves petioles.