عنوان مقاله [English]
To investigate macro- and micronutrients effects on flower quantity and quality of Damask rose (Rosa damasena Mill.), a research was conducted at Alborz Research Station in 2008-2012. It was performed using split plot with 3 replications based on randomized complete block design. Main factor included chemical fertilizers; manure (M), combined fertilizer at 14 levels and sub factor was soil use of micronutrient (0, 8 & 12g Fe chelate). Variance analysis indicated significant effects (P<0.01) of years, main factor (macro-nutrients), and micro-nutrients, year* macro-nutrients, year* micro-nutrients, macro-nutrients* micro-nutrients and year* macro-nutrients* micro-nutrients on number of flower per plant, yield of fresh flower, essential oil percentage, and essential oil yield. Means comparision showed maximum petal yield (7338.9 kg/ha) in second year with application of 12 g micronutrients and N80P80K40M0. The essential oil yield (7019g/ha) and percentage (0.12%) were maximum in secend year with 12 g micronutrients and N40P40K40M0. Results for two years showed that application of 40-80kg/ha NPK fertilizers at planting time and annually consumption of 12 g/plant iron and zinc fertilizer, can improve the quantity and quality of Damask rose.