甘肃不同地域甘草有效成分含量与土壤因子关系的研究

The Research of Relations Between Soil Factors and Active Ingredient Content of Licorice in Different Regions in Gansu

为了研究甘草质量与土壤因子的相关性,筛选影响其质量的主导因子。HPLC法测定甘肃不同产地甘草6种有效成分的含量,理化分析法进行土壤因子(有机质、pH、全氮、铵态氮、硝态氮、全磷、速效磷、全钾、速效钾)的测定,应用相关分析及灰色关联度分析进行综合分析。结果表明,甘草酸与速效磷的相关系数为0.519*;甘草次酸与铵态氮的相关系数为-0.411*。速效钾,铵态氮及pH对甘草黄酮类成分的合成代谢起了关键性作用。无论选择土壤,还是生产中施肥,应重视和合理使用N、K和土壤pH对甘草质量的影响。

The correlation between soil factors and the quality of licorice was studied, of which the leading affecting factor was also screened out. HPLC method was applied to the determination of the content of six active ingredients from different origins in Gansu. Physico-chemical analysis was applied for determining soil factor, including organic matter, pH, total nitrogen, ammonium nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, total potassium, available potassium. The application of correlation analysis and grey relational analysis was made to complicate a comprehensive analysis. The results showed that correlation coefficient of glycyrrhizin and available phosphorus was 0.519＊; glycyrrhetinic acid and ammonium nitrogen was -0.411＊. Available potassium, ammonium nitrogen and pH played the most important roles in the synthesis and metabolism of flavonoids in licorice. Therefore, special attentions should be paid to the effects of N-, K and pH conditions on the quality of radix in the choice of soil and fertilization.