秦艽药材及其生长土壤中无机元素含量特征及相关性分析

Distribution characteristics and correlation analysis of inorganic elements in Gentiana crassicaulis and in growing soil

关键词:  秦艽, 无机元素, 土壤, 关联分析

Key words:  Gentiana crassicaulis, inorganic elements, soils, correlation analysis

摘要:

该研究采用原子吸收分光光度法和火焰光度法,测定云南20个种植地的秦艽及其生长土壤中无机元素的含量,探讨药材中无机元素分布特征,并对药材中无机元素含量与土壤中无机元素含量的相关性进行了分析。结果表明:云南秦艽药材无机元素的含量呈现K>Ca>Mg>Fe>Mn>Zn>Cu有规律的分布态势; 通过相关性分析、主成分分析和逐步回归分析发现秦艽的特征元素为K、Cu、Ca和Zn; 药材中钾含量与土壤中锌,钙与土壤中锰和铜,锰与土壤中钙和镁,铜与土壤中钾和锌元素含量间均分别显著负相关; 而药材中镁含量与土壤中钙和镁,铁、铜与土壤中铁元素含量间均呈显著正相关。对秦艽各无机元素含量影响最大的因子是秦艽生长土壤有效钙,有效铁和有效锌其次,最后为有效锰。该研究结果为秦艽道地性成因及适宜栽培区域的选择提供了参考,为秦艽资源合理利用和GAP研究以及从无机元素的角度品评药材品质提供了理论依据。

Abstract:

This paper aimed to analyse the inorganic elements(K, Ca, Mg, Fe, Mn, Zn and Cu)in Gentiana crassicaulis and in the growing soil in 20 regions of Yunnan Province. The relationship between inorganic elements in G. crassicaulis and that in the growing soil was evaluated. The contents of inorganic elements in G. crassicaulis and in soil were detected by atomic absorption spectrophotometry and flame photometry. The results showed that inorganic elements content in G. crassicaulis presented K>Ca>Mg>Fe>Zn>Mn>Cu regular distribution. The correlation analysis and principal component analysis showed that inorganic elements K, Cu, Ca and Zn were the characteristic elements of G. crassicaulis. K in G. crassicaulis had very significantly negative correlation with available Zn in soil; Ca in G. crassicaulis had significantly positive correlation with available Mn in soil; Ca in G. crassicaulis had significantly positive correlation with available Cu in soil; Mg in G. crassicaulis had very significantly positive correlation with exchangeable Ca in soil; Mg in G. crassicaulis also had very significantly positive correlation with exchangeable Mg in soil; Fe in G. crassicaulis had very significant positive correlation with available Fe in soil; Mn in G. crassicaulis had very significant negative correlation with exchangeable Ca in soil; Mn in G. crassicaulis had very significant negative correlation with exchangeable Mg in soil; Cu in G. crassicaulis had significant negative correlation with available K in soil; Cu in G. crassicaulis had significant negative correlation with available Zn in soil; Cu in G. crassicaulis had significant positive correlation with available Fe. The biggest factor affecting inorganic element in G. crassicaulis was available Ca in soil, followed was available Fe and available Cu, and finally was available Mn in soil. This research on G. crassicaulis medicinal herbs and its growth soil inorganic element correlation in 20 regions of Yunnan Province, provided reference for the choice of suitable cultivation area, for G. crassicaulis medicinal materials quality evaluation, from the viewpoint of the inorganic elements and G. crassicaulis resources reasonable use. This result will provide a reference to evaluate the quality of G. crassicaulis from inorganic elements and for reasonable utilization of G. crassicaulis resources and its GAP research.