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Black Raspberry is one of the most important perennial fruit in Iran. Studies were conducted to determine the effect of nano-iron fertilizer and vermicompost on flower diameter and fruit weight, yield, acidity, sugar, vitamins C and iron content of Rubus occidentalis . For this, 3 levels of iron-nano fertilizer (0, 500, 1,000 mg L) and 4 levels of vermicompost (0, 100, 200 and 400 kg ha) were supplemented as balance fertilizer requirement of black Rubus occidentalis in Mazadndaran province of Iran. The experiments was carried out as a factorial experiment based on randomized complete block design with 2 factors in 12 treatments, 3 replications and 36 experimental plots. The iron-nano fertilizer and vermicompost were incorporated into top 10 cm layer of soil, which was supplemented on the basis of chemical analysis calculated to equalize the recommended dose of nutrients. Iron-nano and vermicompost application significant increase fruit yield (45.73g) and fruit weight (11.05g) at levels of 1000 mg L of iron-nano fertrilizar plus 100 kg ha of vermicompost.

INFLUENCE OF NANO-IRON FERTILIZER AND VERMICOMPOST SUPPLEMENT ON THE PHYSIOLOGICAL AND VEGETATIVE PARAMETERS OF BLACK RASPBERRY IN IRAN