Mechanical primary processing of Polygonatum cyrtonema Hua

doi:10.16178/j.issn.0528-9017.20240449

Abstract

Abstract:

Traditional primary processing of Polygonatum cyrtonema Hua often suffers from low efficiency due to variations in steaming equipment and grading standards. In this study, a roller kiln was used to replace conventional steaming tools for fixation, followed by drying in the same kiln, to explore a mechanical primary processing method for Polygonatum cyrtonema Hua. Tubers were classified into large, medium, and small sizes based on diameter. By measuring the moisture, ash, polysaccharide, and extract contents under different fixation and drying durations, the effects of processing time on quality were analyzed to optimize the mechanical primary processing parameters. The results indicate that in practical production, the fixation time can be set according to large tubers, i.e., 18.5 hours, while drying time should be graded according to tuber size. This approach effectively ensures that the processed tubers meet the pharmacopoeial standards for moisture, ash, and extract content, while maintaining high polysaccharide levels.

Key words: Polygonatum cyrtonema Hua, quality, primary processing, moisture content, polysaccharide

CLC Number:

S567.239

CAI Yunzhang, LI Hongfa, LIANG Zongsuo, JIA Qiaojun. Mechanical primary processing of Polygonatum cyrtonema Hua[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(12): 2927-2931.

Figures/Tables 5

Fig.1 Cross-sectional photos of Polygonatum cyrtonema Hua tuber before and after fixing

Fig.2 The curve of moisture content variation of Polygonatum cyrtonema Hua tuber with drying time during the drying process

Fig.3 The curve of ash content variation of Polygonatum cyrtonema Hua tuber with drying time during the drying process

Fig.4 The curve of polysaccharide content variation of Polygonatum cyrtonema Hua tuber with drying time during the drying process

Fig.5 The curve of extract content variation of Polygonatum cyrtonema Hua tuber with drying time during the drying process

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