Abstract

Spinach (Spinacia oleraceae L.) is an important leafy vegetable and belongs to Chenopodiaceae family. This research was carried out in order to evaluate the effect of different concentrations of vermicompost-tea and Dupinix® organic fertilizer on some characteristics of spinach cv. “Oriental Pride”. The experiment was done in randomized complete block design with three replications. Treatments were five vermicompost-tea concentrations (0, 20, 40, 60 and 80%) and organic fertilizer Dupinix® in four concentrations (1, 2, 3 and 4 per 1000 V/v). Results indicated that the foliar application of both the fertilizers had significant effects on evaluated characteristics. The highest (28.96 g) and lowest (14.47 g) plant fresh weight were measured in Dupinix® 4 per 1000 V/v and control treatments, respectively. Plants were treated with both of fertilizes had higher amount of leaf area than control. The highest total phenolic content (58 mg/kg) was measured from Dupinix® 3 and 4 per 1000 V/v and the lowest (43 mg/kg) in the control treatment. Elements analysis of plant tissue showed that treated plants with organic fertilizer had higher concentration compared to control. It was suggested that vermicompost-tea and Dupinix® fertilizer could be used to improve important parameters of spinach.