Effect of surface and subsurface drip irrigation on yield of Damask Rose under different irrigation regimes

The effect of two irrigation systems (surface vs. subsurface drip irrigation) on yield، irrigation water use efficiency and percentage of essential oil in Rosa damascene under three levels of irrigating water (100، 70 and 40 % of potential evapotranspiration) has been investigated. The experiment was performed as a split plots design based on randomized complete blocks of three replications at the Research Center of Agriculture and Natural Resources، Kerman Province (Joopar Research Station) during 2012 to 2013. Results indicated that the yield، irrigation water use efficiency and percentage of the rose’s essential oil did not significantly differ for the two types of irrigation systems. The treatment 100% of potential evapotranspiration yielded the highest flower (2716. 93 kg/ha). The highest irrigation water use efficiency (2. 14 kg/(ha. m3)) was found for the 40% potential evapotranspiration treatment. Moreover، the highest percentage of the flower’s essential oil was recorded for the treatment of 70% potential evapotranspiration.