The relationship between selected rhizosphere and non/rhizosphere soil properties and the quality ofPyrola decorata

以野外调查和室内分析相结合，采用相关分析、主成分分析、回归分析、通径分析等多种分析方法，对秦岭太白山区不同生境下野生普通鹿蹄草有效成分（总黄酮、单宁、金丝桃苷、槲皮素和抗氧化活性（DPPHIC₅₀）与其根际和非根际土壤性质的关系做了研究。结论如下：（1）根际土壤速效钾、pH和脲酶与单个有效成分含量之间呈现出显著或极显著作用，而非根际土壤速效钾与5种有效成分均达到显著或极显著正相关。（2）根际土壤速效钾、pH、转化酶和脲酶是影响普通鹿蹄草有效成分含量的主导因子，而非根际土壤有效氮、速效钾、pH和转化酶是综合影响其含量的主导因子。（3）根际土壤速效钾是影响普通鹿蹄草有效成分含量的主要决策因素，而pH、转化酶和脲酶是其主要限制因素；非根际土壤有效氮和速效钾是影响普通鹿蹄草有效成分含量的主要决策因素，而pH和转化酶是其主要限制因素。由此得出，普通鹿蹄草有效成分含量受根际和非根际多种土壤因子的综合影响，且土壤速效钾含量、pH、转化酶是影响其含量的共同因子。;Pyrola decorata is a native plant species on Mt. Taibai in the Qinling Mountains. Because of its medicinal value, a large amount of wild P. decorata has been excavated in recent years. As a result, the P. decorata population on Mt. Taibai has gradually decreased. In order to protect P. decorata, it is important to study the relationship between P. decorata quality and selected chemical properties of rhizosphere and non-rhizosphere soil. Plant and soil samples were collected from different habitats on Mt. Taibai and taken to a laboratory for analysis. The plant samples were analyzed to determine the total flavonoid, tannin, hyperin, and quercetin content of P. decorata. The antioxidant activity (DPPHIC₅₀) of the samples was also determined. Correlation analysis, principal component analysis, regression analysis, and path analysis were conducted to determine the relationship between medicinally active compounds in wild P. decorata and selected properties of rhizosphere and non-rhizosphere soil. The results indicated that in rhizosphere soil, available potassium concentration, pH, and urease were positively correlated with individual compounds in P. decorata. In contrast, for non-rhizosphere soil, available potassium was significantly correlated with five active compounds. In rhizosphere soil, available potassium, pH, invertase, and urease were the main factors influencing the active compound content of P. decorata, whereas in non-rhizosphere soil available nitrogen, available potassium, pH, and invertase were the main factors. In rhizosphere soil, available potassium was the most important factor influencing the active compound content, whereas soil pH, catalase, and acid phosphatase were the main limiting factors. In non-rhizosphere soil, available nitrogen and available potassium were the most important factors influencing the active compound content, whereas soil pH and invertase were the main limiting factors. In conclusion, the content of active compounds in of P. decorata is affected by multiple soil factors, especially soil available potassium, soil pH, and invertase.