Effect of combined fertilizers and iron chelate foliar on quantity yield of Rosa damascena

According to the nutrition role in product quality and quantity of Rosa damascena, in order to determine appropriate amounts and new consumption methods (foliar spray), this project was conducted in Research Institute of Forests and Rangelands, as split plot with three replications during 2011. Main plot consisted of combined fertilizer at 5 levels 1: N0, P0 & K0kg/ha + manure 0ton/ha, 2: N40, P40 & K0kg/ha + manure 15ton/ha, 3: 40, P40 & K40kg/ha + manure 15ton/ha, 4: N80, P80 & K40kg/ha + manure 30ton/ha & 5: N120, P120 & K80kg/ha + manure 40 ton/ha) and sub plot were foliar spray of iron chelate at four levels (0, 1, 2 & 3 times). The analysis of variance showed that the effect of main and sub factor were significantly different for all of measured traits (α≤0.01). According to results, the highest flower number per bush (3937.8n/plant) and hectare 4374840n/ha) belonged to fertilizer treatment 4. There was no significant difference between foliar spray numbers but each of them had higher flower yield per bush and hectare than control treatment (free foliar spray). Interaction effect of fertilizer treatment 4 in 2 foliar spray showed the highest oil percent with 0.0658%. The highest oil yield (3965.8g/ha) observed in treatment 4 in 3 foliar spray. Based on these results, simultaneous use of chemical fertilizer (NPK), manure and foliar spray of microelements increased yield. So, this fertilizer compound could be compensated the problem of reducing quality and quantity of product in the second half of flowering period.