Abstract
In this study the effect of three levels of vermicompost (0, 15 or 30 % V/Pot), two levels of biophosphate (treated and untreated) and two levels of azotobacter (treated and untreated) on content and constituents of essential oil of Dracocephalum moldavica was investigated. The Results showed that the essential oil content of dragonhead (Dracocephalum moldavica) and its constituents were significantly affected by biofertilizer treatments. The highest essential oil content (0.74 %) obtained by the treatment of vermicompost (30 % V/Pot). Fifteen components identified in the oil of plants which fertilized by biofertilizers. The highest geranyl acetate content (61.1 %) of essential oil were obtained by the treatment of vermicompost (30 % v/Pot), while the highest geraniol content in essential oil (24.2 %) obtained by the treatment of vermicompost (15 % V/Pot) along with untreated biophosphate and highest geranial content of essenitial oil (18.2 %) obtained by the treatment of vermicompost (15 % V/Pot) along with untreated azotobacter. Vermicompost had a promoting influence on most of vegetative growth parameters and it has been led to make accumulation of essential oil, chemical constituents including total carbohydrate and photosynthetic pigments content.
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