This test materials is 'feng Dan', an oil peony, or tree peony as an oil plant, growing in Yangtze river basin. Impact of cyanamide on oil peony epicotyl dormancy was represented with germination rate of peony feeds, a-amylase activity, soluble sugar content, soluble protein content and peroxidase (POD) activity. Results showed that hypocotyls' dormancy of peony seeds was significant breaken by 0.3% cyanamide concentration. Alpha-amylase activity, soluble sugar content, soluble protein content and POD activity in 0.3% cyanamide concentration treatment was significantly higher than other treatments. There was no significant difference between the rest treatments.
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