Effect of Applying Bio Fertilizers and Salicylic Acid Application on NPK in Soil and Fruits of Eggplant solanaum melongena. Under Protected Conditions

A field experiment was carried out during the winter season 2022-2021 in greenhouses in the second agricultural research station of the College of Agriculture - University of Al-Muthanna in the Al-Bandar region, southwest of Al-Muthanna Governorate to study the effect of applying the bio-inoculum to Azospirillum and Mycorrhiza and spraying with different levels of salicylic acid. The study of a field experiment designed by randomized complete block design (RCBD) with three replications and two factors, where the first factor, the A.lipoferum bacteria and Mycorrhiza and the second factor represents spraying with salicylic acid at three levels. The bio fertilizer of A.lipoferum and Mycorrhiza B3 treatment achieved a significant increase in the concentration of nitrogen, phosphorous and potassium in the soil and plants. The treatment of salicylic acid gave a significant superiority, as the S2 treatment recorded a superiority in the ‘concentration of nitrogen, phosphorous and potassium ready in the soil.