Investigation of growth indices and biochemical properties of ‘Shirin Tarom’ pomegranate (Punica granatum L.) aril cow manure and vermicompost

Document Type : Original Article


1 Former M. Sc. Student, Department of Horticultural Science, University of Guilan, Rasht-Iran.

2 Associate Professor, Faculty of Agricultural Sciences, University of Guilan, Rasht-Iran.

3 Associate Professor, Department, of Agronomy and Plant Breeding, University of Guilan, Rasht- Iran.



In order to evaluate the effect of cow manure and vermicompost different levels on growth and developmental indices and improvement of biochemical traits of ‘Shirin Tarom’ pomegranate in a randomized complete block design with cow manure, vermicompost and a combination of the two in three levels of 3, 6 and 9 kg for each tree as a compost with a total of ten treatments and three replications in 2018-2019. Results showed that the maximum weight (313 g), length (78.2 mm), diameter (84.7 mm) and volume of fruit juice (134.5 ml) were significantly improved in vermicompost treatment at the level of 9 kg; whereas, their lowest amount were observed in the control treatment. Accordingly and taste index (19.5 °Brix) was significantly higher in 3 kg vermicompost regim. Cow manure in the 3 and 6 kg lead to improve of total phenol (221 mg/ 100 ml fruit juice) and titratable acidity (1.2%), respectively. Combined fertilizers at 9 kg for yield (8.3 ton per hektar) and 3 kg for aril volume (0.40 ml) were higher than other treatments. However, the control treatment showed the lowest pomological traits but revealed a considerable SSC (14.9 Brix°), total anthocyanin (36.3 mg/L) and DPPH (%78.6).