Study On Main Economic Characters Of Four Cultivars Of Medicinal Chrysanthemum Morifolium Ramat. In Jiangsu Province

Four different cultivars of Chrysanthemum morifolium Ramat. were cultivated in Sheyang county Jiangsu province under same cultural conditions in 2001, 2002, their botany characters, quality, evaluation of salt tolerance for their seedlings, comparison yield have been observed. The results are as following:1, Four cultivars of medicinal C. morifolium is different in some botanic characters: "Hongxinju" was higher than other cultivars on height of plant, length of lamina, diameter of stem and agricultural character; "Xiaobaiju" is the best on the ramification and the quantity of capitulum on individual plant; "Dabaiju" is the most on the quantity and layer number of ligulate flower; "Changbanju" is me longest on the capitulum diameter and corolla of ligulate flower.2, The plant height, rate of dried material accumulate and chlorophyll content of four medicinal C. morifolium cultivars has been decreased with salt concentration being increased. With NaCl stress is intensified in certain concentration, relative growth rate has been decreased in order to: "Changbanju" >"Dabaiju" > "Xiaobaiju"> "Xiaobaiju", especially the difference is obvious in 200 mmol· L-1 NaCl stress. "Hongxinju" and "Xiaobaiju" would be cultivated appropriately in salt soil area.3, Chemical constituents of four cultivars cultivated with the same conditions were compared in three types: chlorogenic acid, flavonoid and volatile oil. The result is that the content of chlorogenic acid, flavonoid and volatile oil extracted from capitulum of C. morifolium is obviously different in cultivars and processing methods. The contents of chlorogenic acid was the highest in "Changbanju". "the lowest in Dabaiju"; the contents of flavonoid was the highest in "Dabaiju", the lowest in "Hongxinju"; the contents of volatile oil was the highest in "Hongxinju", the lowest in "Dabaiju". The content of chlorogenic acid is in comformity with "The Pharmacopoeia of the People's Republic of China". Volume one (2000 edition). But "Hongxinju" as tea-drinking has been the best base on flavonoid, chlorogenic acid and volatile oil.4, The quantity of capitulum on individual plant is main composite factor of yield of medical C. morifolium, the yield of "Hongxinju" and ''Xiaobaiju" are higher significantlythan that of "Dabaiju" and "Changbanju".5, Conclusively: Salt tolerance of "Hongxinju" is the strongest, yield is the highest, equality is the best, It would be cultivated appropriately in Sheyang County of Jiangsu Province.