Study of aril and leaf mineral compositionof pomegranate cv. Naderi with spraying fertilizer containing amino acid under drought stress conditions

In order to the study of aril and leaf mineral composition of pomegranate cv. Naderi with spraying fertilizer containing amino acid under drought stress conditions, an experiment was conducted as a split plot based on randomized complete block design. Irrigation treatment in three levels (100%, 75% and 50% required water) and fertilizer containing amino acids in four levels (0, 2, 3 and 4 milliliter per liter) were applied. Spraying was done in four stages (before anthesis, after fruit set, rapid growth phase and two weeks before harvest). The results showed increasing water stress decreased nitrogen (5.97%), phosphorus (0.37%) and potassium (0.07%) and increased iron (230 ppm) in aril and potassium (0.08%) and iron (348.84 ppm) in leaves in comparison to the control without water stress. Increasing level of amino acid fertilizer increased nitrogen (8.75%), potassium (0.1%) and iron (235.92 ppm) in the aril and level of phosphorus (0.64%) in the leaves but decreases the amount of potassium (0.07%) and iron (324.19 ppm) in the leaves. Based on the results it can be stated that spraying of fertilizer containing amino acids significantly improved the nutritional value of pomegranate and reduced the harmful effects of drought stress.