Effects of Nitrogen Application on Growth and Bioactive Compounds of Chrysanthemum indicum L. (Gamgug)
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To fulfill the increasing demand for a high quality of flower, we investigated the effects of nitrogen application on plant growth, yield and bioactive compounds of Chrysanthemum indicum L.. C. indicum L. was cultivated in a pot scale, and nitrogen applied with the level of 0 (N0), 50 (N50), 100 (N100), 150 (N150), 200 (N200) and 300 (N300) ㎏ ㏊−1 to suggest optimum rate of nitrogen fertilization. Phosphate and potassium applied the same amount of 80-80㎏ ㏊−1 (P2O5-K2O) in all treatments. Growth characteristics and yields of C. indicum L. were significantly affected by nitrogen application. Maximum yield achieved in 265 and 295㎏ ㏊−1 N treatment on the whole plant and the flower parts, respectively. The nitrogen content and uptake of whole plant significantly increased by the increase of nitrogen application. Five major components of essential oil, α-pinene, 1,8-cineol, chrysanthenone, germacrene-D, and α–curcumene in flowerheads of C. indicum L. occupied approximately 40% of peak area, germacrene-D decreased by the increase of nitrogen application among them. Howerer, cumambrin A contents in the flower parts of C. indicum L. were affected negatively by the increase of nitrogen application, but total yields of cumambrin A in flower part significantly increased. Conclusively, nitrogen fertilization could increase the yield of flowerheads. The optimum application level of nitrogen fertilizer might be on the range of 265-295㎏ ㏊−1 in a mountainous soil.
Abstract
To fulfill the increasing demand for a high quality of flower, we investigated the effects of nitrogen application on plant growth, yield and bioactive compounds of Chrysanthemum indicum L.. C. indicum L. was cultivated in a pot scale, and nitrogen applied with the level of 0 (N0), 50 (N50), 100 (N100), 150 (N150), 200 (N200) and 300 (N300) ㎏ ㏊−1 to suggest optimum rate of nitrogen fertilization. Phosphate and potassium applied the same amount of 80-80㎏ ㏊−1 (P2O5-K2O) in all treatments. Growth characteristics and yields of C. indicum L. were significantly affected by nitrogen application. Maximum yield achieved in 265 and 295㎏ ㏊−1 N treatment on the whole plant and the flower parts, respectively. The nitrogen content and uptake of whole plant significantly increased by the increase of nitrogen application. Five major components of essential oil, α-pinene, 1,8-cineol, chrysanthenone, germacrene-D, and α–curcumene in flowerheads of C. indicum L. occupied approximately 40% of peak area, germacrene-D decreased by the increase of nitrogen application among them. Howerer, cumambrin A contents in the flower parts of C. indicum L. were affected negatively by the increase of nitrogen application, but total yields of cumambrin A in flower part significantly increased. Conclusively, nitrogen fertilization could increase the yield of flowerheads. The optimum application level of nitrogen fertilizer might be on the range of 265-295㎏ ㏊−1 in a mountainous soil.
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