Abstract: The stems of 5-year-old Polygonatum cyrtonema Hua planted in bamboo forest and field in Sanzhulun Mountain area of Jingan County, Jiangxi Province were taken as the research object. Using the constant pressure steam nine-steam-nine-bask processing method,the contents of extracts, polysaccharides, total flavonoids, total saponins and total phenols were measured. The variation law of the content of each chemical component was analyzed, and the quality of each sample was evaluated comprehensively by membership function method. The results showed that during the processing process, the content of extracts was higher than the 45% specified in pharmacopoeia; with the increase of processing times, the content of polysaccharide decreased, and the content was lower than the index specified in pharmacopoeia; the content of total flavonoids showed an increasing trend; the content of total saponins showed a fluctuating trend;the total phenol content showed a decreasing trend, with the highest content in fresh Polygonatum cyrtonema Hua; the appearance character changes of Polygonatum cyrtonema Hua were consistent, with the increase of processing times, the color gradually became darker and finally became black. By calculating the membership function values of each component and conducting comprehensive ranking, it was found that the imitation of wild Polygonatum cyrtonema Hua under bamboo forest was better than that under field cultivation. At the same time, it was found that the comprehensive ranking of the seventh processing of forest plantings was higher than that of other processing times, and the comprehensive ranking of the fourth processing of field plantings was higher than that of other processing times.

Key words: Polygonatum cyrtonema Hua, nine-steam-nine-bask processing, planting mode, main component, membership function value