不同产地川党参药材质量差异及相关性研究OA

Objective To analyze the quality differences and influencing factors of Codonopsis tangshen Oliv.from different habitats.Methods Two-year-old Codonopsis tangshen Oliv.from different habitats were used as research materials.The phenol-sulfuric acid method was employed to determine the polysaccharide content,high-performance liquid chromatography(HPLC)was used to measure the contents of codonoside I and codonolactone,and correlation analysis was conducted to explore the relationships among the appear-ance traits of Codonopsis tangshen Oliv.,soil physicochemical properties,and medicinal components.Results The quality traits of Codonopsis tangshen Oliv.from Daozhen,Guizhou showed significant differences from other habitats.It exhibited the longest root length,root diameter,leaf longitudinal and transverse diameters,and petiole length,with the heaviest dry weight per plant,as well as higher contents of codonoside I and codonolactone.Soil physicochemical properties varied significantly among different habitats,the soil pH in Daozhen,Guizhou was notably higher than that in other regions,the available phosphorus and available potassium contents in Enshi,Hubei were significantly higher,the contents of organic carbon,organic matter,total nitrogen,and alkali-hydrolyzable nitrogen in Wushan,Chongqing were all significantly higher,and the available potassium content in Fengjie,Chongqing was significantly higher.No significant differences were found in total phosphorus and total potassium contents across all habitats.Correlation analysis showed that polysaccharides in Codonopsis tangshen Oliv.were significantly positively correlated with root length,root diameter,and pH,codonoside I was significantly positively correlated with dry weight per plant,leaf transverse diameter,and petiole length,but sig-nificantly negatively correlated with organic carbon,organic matter,total potassium,and available phosphorus,codonolactone was sig-nificantly negatively correlated with pH and total potassium,but significantly positively correlated with available potassium.Conclusion The quality of Codonopsis tangshen Oliv.demonstrates obvious regional differences,with the variety from Daozhen showing superior quality.Soil factors have differential impacts on the quality of Codonopsis tangshen Oliv..It is recommended to focus on regulating soil pH and implementing rational fertilization in its cultivation to improve the quality of Codonopsis tangshen Oliv..