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Two field experiments were carried out to study the response of Dracocephalum moldavica L. to NPK fertilizer and different application techniques of MOG organic fertilizer in two regions of Iran (Piranshahr with cold Mediterranean climate and clay loam soil,  Maragheh with cool sub-humid temperate climate and sandy loam  soil). MOG is bio-organic fertilizer with plant origin and contains different natural enzymes and amino acids. In current study following treatments have been applied: NPK (a complete NPK 20-20-20, 90 kg fertilizer ha -1 ); MOG 1 (soil application of MOG organic fertilizer at sowing stage); MOG 2 (foliar application of MOG organic fertilizer at early stage of flowering); MOG 3 (soil application of MOG organic fertilizer at sowing and at 5 to 6 leaf stage); MOG 4 (soil application of MOG organic fertilizer at sowing and at 5 to 6 leaf stage with foliar application at early stage of flowering). Results indicated that all MOG treatments overcome the chemical fertilizers in both locations. However, plants grown in Piranshahr were more responsive to MOG fertilizer treatments than those grown in Mragheh. Overall, it could be concluded that utilization of MOG fertilizer as both soil and foliar application (MOG 4 ) may increase content and yield of essential oil, which could be suggested as a suitable alternative for chemical fertilizers.

Influence of chemical and organic fertilizer on growth, yield and essential oil of dragonhead (Dracocephalum moldavica L.) plant