甘草药材生产区划研究

通过走访和实地调查,收集乌拉尔甘草在全国的采样信息。以乌拉尔甘草药材生产区46个采样点为分析基点,分析乌拉尔甘草中甘草苷、甘草酸、总黄酮含量,综合气候、地形等相关生态因子,利用GIS技术和最大信息熵模型分析其适宜性分布。应用SPSS构建乌拉尔甘草有效成分与环境因子之间的关系模型,采用Arc GIS软件空间计算方法进行乌拉尔甘草品质区划。研究结果显示影响乌拉尔甘草适宜性分布的主要生态因子为7月平均气温,土壤亚类,12月降水量,植被类型和温度季节性变化的标准差等5个生态因子,这与甘草喜光照充足、降雨量少、夏季酷热、昼夜温差大,适宜于分布在北温带的平原、山区的生活习性基本一致。此外,以甘草苷、甘草酸、总黄酮成分为指标的乌拉尔甘草品质区划结果还提供了其品质适宜分布区,为开展乌拉尔甘草合理引种栽培提供了科学依据。

Production regionalization study of Glycyrrhiza uralensis

The distribution information of Glycyrrhiza uralensis was collected by interview investigation and field survey, and 46 related environmental factors were collected, some kinds of functional chemical constituents of G.uralensis were analyzed. Integrated climate, topography and other related ecological factors, the habitat suitability study was conducted based on Arc geographic information system(ArcGIS),and maximum entropy model. The AUC of ROC curve was both above 0.95, indicating that the predictive results with the maximum model were highly precise. The results showed that 5 major ecological factors have obvious influence on ecology suitability distributions of G. uralensis, including July average temperature, soil sub category, Dec precipitation, vegetation types and standard deviation of seasonal variation in temperature, et al. It is suitable for the living habits of the G. uralensis, adequate light, low rainfall, summer heat and large temperature difference between day and night, which is suitable for distribution in the northern temperate plains and mountains. In addition, the ecological suitability regionalization based on the chemical constituents of G.uralensis also provides a new suitable distribution area other than the traditional distribution area, which provides a scientific basis for the reasonable introduction of G.uralensis.