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Yield and Phytochemical Attributes of Ashwagandha (Withania somnifera Dunal) Tubers as Affected by Source of Nutrients

Ewon Kaliyadasa 1, Lalith Jayasinghe 2,and Sriyani Peiris 3
1. Department of Export Agriculture, Faculty of Animal Science and Export Agriculture, Uva Wellassa University, Badulla, Sri Lanka
2. Institute of Fundamental Studies, Kandy, Sri Lanka
3. Postgraduate Institute of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka
Abstract—Ashwagandha (Withania sominifera Dunal) is an imperative medicinal crop in herbal industry since time immemorial which roots are in commercial importance. This herb known for its ability to enhance the resistance to stresses, increases stamina and promotes general wellbeing. The changes in the plant growth and quality of the roots mainly depend on different agronomic practices coupled with stage of harvesting. Plants grown under organic and inorganic sources of nutrients were used up to twelve months of sowing for yield analysis and tubers were analyzed for its alkaloid, total fiber and withaferine A contents upto ten months. Highest values for all above phyto constituents were recorded in tubers of organically grown compared to inorganically fertilized plants except crude fiber content and at six months after sowing is the best stage for harvesting to obtain high quality tubers. This is an important study for biochemical standardization of Ashwagandha tubers in commercial processing.

Index Terms—ashwagandha, withaferine A, organic fertilizer, inorganic fertilizer, fiber, alkaloid

Cite: Ewon Kaliyadasa, Lalith Jayasinghe, and Sriyani Peiris, "Yield and Phytochemical Attributes of Ashwagandha (Withania somnifera Dunal) Tubers as Affected by Source of Nutrients," Journal of Advanced Agricultural Technologies, Vol. 5, No. 2, pp. 144-148, June 2018. Doi: 10.18178/joaat.5.2.144-148
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