A Comparative Study for Obtaining Maximum Essential Oil from Six Herbs on the Basis of Harvesting Time, Cultivation Regions & Type, and Drying Methods

作者：Choi In Young^*; Song Young Ju; Choi Dong Chil; Lee Wang Hyu

来源：Korean Journal of Horticultural Science and Technology, 2010, 28(3): 492-496.

• cultivation type and region
• drying method
• extraction method and part
• harvesting time

This experiment was carried out to obtain the maximum quantity of essential oil on the basis of harvesting time, cultivation regions & types, and drying methods. We have selected 6 native and introduced herbs viz. Thymus quinquecostatus, Agastache rugosa, Chrysanthemum indicum, Rosmarinus officinalis, Chamaemelum nobile, and Lavandula stoechas. The quantity of essential oil ranged from 0.06% to 3.46% in all six herbs. Native herbs produce 30.5% higher quantity of oil in comparison to introduced herbs. The quantity of essential oil obtained from Lavandula stoechas was 3.46%, followed by Rosmarinus officinalis 2.89%, while minimum in Agastache rugosa 0.60%. Higher quantity of essential oil obtained if they are cultivated under rain shelter culture (PE film) in comparison to open field conditions. Recovery of essential oil is always high if herbs flower in July. Semi-alpine region was found better than the plain region for herbs production. Quantity of oil is high if oil is extracted from fresh herbs followed by freezed herbs, shade dry and hot wind dry herbs. As far as plant part is concern flower produced maximum oil than any other part.

• 出版日期2010-6