Effect of Spraying of Fertilizer Containing Amino acids on Yield and Quality of Pomegranate Cultivar  Naderi under Deficit Conditions

Pomegranate is one of the most important horticultural crops in our country and one of the most important factors limiting development of its culture is the water shortage. Importance of amino acids in regulating plant growth and biosynthesis and anti-stress properties are well known to investigate drought stress on pomegranate and effect of amino acids application in reducing the damage caused by stress an experiment were performed as split-plot in a randomized complete block design. Irrigation in three levels (100% required water, 75% required water and 50% required water) and organic material treatment was in four levels (0, 2, 3 and 4 ml l-1). Some qualitative and quantitative traits of fruit were measured. The results revealed that drought stress significantly reduced yield. The use of amino acids could significantly enhance the yield efficiency and reduce the negative effects of stress, Also, with increasing levels of amino acid, ascorbic acid content significantly increased and by reducing irrigation levels the amount of ascorbic acid and anthocyanins significantly decreased. Therefore it was concluded that application of fertilizer containing amino acids increase the yield and fruit quality in pomegranate.