Mohammad Taghi Darzi; Mohammadreza Haj Seyed Hadi
Abstract
To study the effects of organic and bio-fertilizers on quantity and quality of essential oil of dragonhead (Dracocephalum moldavica L.), an experiment was conducted as randomized complete blocks design with eight treatments and three replications at agricultural research field of the Company of Ran in ...
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To study the effects of organic and bio-fertilizers on quantity and quality of essential oil of dragonhead (Dracocephalum moldavica L.), an experiment was conducted as randomized complete blocks design with eight treatments and three replications at agricultural research field of the Company of Ran in Firouzkuh of Iran during the growing season of 2014-2015. The treatments were 20 t/ha manure, 10 t/ha vermicompost, biofertilizer (2 lit/ha nitroxin + 2 lit/ha bio-superphosphat), 10 t/ha manure + 5 t/ha vermicompost, 20 t/ha manure + biofertilizer, 10 t/ha vermicompost + biofertilizer, 10 t/ha manure + 5 t/ha vermicompost + biofertilizer and chemical fertilizer (NPK: 80, 70 and 80 kg/ha). The results have shown that the highest essential oil percent, essential oil yield, geraniol percent and linalool percent were obtained in essential oil at the treatment of application of 10 t/ha vermicompost and the maximum geranial percent, neral percent and neryl acetate percent were observed in essential oil at the treatment of integrated application of 10 t/ha vermicompost and biofertilizer. Also, the highest geranyl acetate percent was obtained in essential oil at the treatment of chemical fertilizer application (control). Generally, the highest percent and yield of essential oil and essential oil quality were obtained using 10 t/ha vermicompost application.