Effect of the foliar spraying of iron and soil application of the ammonium nitrate, on postharvest quality of apple 'Delbar stival'

Document Type : Full Paper


1 Former M.Sc. Student, University College of Agriculture and Natural Resources University of Tehran Karaj, Iran

2 Professor, University College of Agriculture and Natural Resources University of Tehran, Karaj, Iran

3 Associate Professor, University College of Agriculture and Natural Resources University of Tehran, Karaj, Iran


In addition to storage conditions, pre-harvest factors including nutrition is essential to increase the shelf life. In this experiment the effects of three different levels of iron foliar applications (0, 50 and 100 ppm) and nitrogen (20, 40 and 60 ppm) application in the soil were investigated in apple (Malus domestica cv. Delbar stival). Traits such as quality factors during storage period were measured. The factorial experiment was carried out based on randomized completely block design (RCBD) with three replications. According to the results of this study, iron application increased TSS, dry weight and total phenolic contents. Also, with increasing nitrogen concentration, the antioxidant level was increased. Effect of storage on some para meters such as firmness, dry matter, total phenolic content, vitamin C and total antioxidants was significant, leading to a decline in the quality of the fruits. It can be concluded that, iron application at 100 mg/l per tree was suitable for improving the quality indexes for this cultivar.


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