不同产地、不同海拔地区的甘松地上部分无机元素的多维统计分析

目的:比较不同产地甘松药材地上部分的无机元素含量差异,分析其无机元素分布特征,为评价市场上流通的甘松全草统是否科学、合理提供试验依据。方法:采用湿法消解-ICP-OES法同时测定不同产地甘松药材地上部分的无机元素含量,通过相关性分析、主成分分析、聚类分析、偏最小二乘判别分析、正交偏最小二乘判别分析方法对测定结果进行分析。结果:元素间具有显著的相关性,多维统计分析确定甘松地上部分特征元素为Pb,Se,As,Si,Mo,Co,Ni,Cd,Cr,Tl,Na,Sn;对地上部分样品能够较好地聚类;海拔在3 400~3 500 m时,甘松地上部分各无机元素含量大都达到峰值(对植物生长有益元素)。结论:基于甘松地上部分无机元素的角度考虑,3 400~3 500 m为甘松最适宜生长海拔高度,同时土壤作为关键因素;对于甘松药材入药部位甘松根及根茎、甘松全草及甘松地上部分这三者是否可以互为替代、甘松资源的合理分配提供理论支撑和参考。

Multidimensional Statistical Analysis of Inorganic Elements in Above Ground Parts of Nardostachs jatamansi from Different Producing Areas and Different Elevations

Objective: To compare the contents of inorganic elements of the above ground parts of Nardostachs jatamansi from different origins, analyze the distribution characteristics of inorganic elements, and provide experimental basis for evaluating the scientificity and rationality of the whole plant of N. jatamansi on market. Method: The contents of inorganic elements in the above ground parts of N. jatamansi from different origins were simultaneously determined by wet digestion-ICP-OES. The results were then analyzed by correlation analysis, principal component analysis,cluster analysis, partial least squares discriminant analysis and orthogonal partial least squares discriminant analysis. Result: There was a significant correlation among the elements. The multidimensional statistical analysis showed that the characteristic elements of the above ground parts of N. jatamansi were Pb,Se,As,Si,Mo,Co,Ni,Cd,Cr,Tl,Na and Sn, and this method could well cluster the samples above the ground. At the altitude of 3 400-3 500 m,the content of the most inorganic elements reached the peak value (elements beneficial for the plant growth). Conclusion: Based on the inorganic elements of the above ground parts of N. jatamansi,the altitude of 3 400-3 500 m was the optimum growth altitude,and soil as a key factor. The results provided theoretical support for rational resource distribution and whether the root and rhizome,the whole plant and the above ground parts of N. jatamansi could be replaced by each other.