Influence of biofertilizers on the essential oil content and constituents of Dracocephalum moldavica L.

In this study the effect of three levels of vermicompost (0, 15 and 30% V/Pot), two levels of biophosphate (application and not application) and two levels of azotobacter (application and not application) on content and constituents of essential oil of Dracocephalum moldavica L. 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%) was obtained when 30% pot volume was vermicompost. Fifteen components were identified from the oil of plants which were fertilization by biofertilizers. The highest geranyl acetate content (61.1%) of essential oil were obtained when 30% pot volume was vermicompost, while the highest geraniol content in essential oil (24.2%) was obtained when 15% pot volume was vermicompost with application of biophosphate. and highest geranial content of essenitial oil (18.2%) was obtained with 15% pot volume was vermicompost with application of 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.