阿拉善地区荒漠肉苁蓉生态适宜性区划研究

肉苁蓉为特色名贵中蒙药。通过走访和实地调查,收集肉苁蓉野外分布信息,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对阿拉善地区肉苁蓉进行适宜性区划研究。ROC曲线的AUC值均在0.9以上,表明最大信息熵模型的预测结果可信度高。研究结果显示影响肉苁蓉适宜性分布的主要生态因子为植被类型等14个生态因子,其适宜区域集中分布在阿拉善右旗中部(包括塔木苏苏木、阿拉腾敖包镇)、阿拉善左旗北部(包括吉兰泰镇、乌力吉苏木、苏红图苏木)以及额济纳旗的东南部(包括古日乃苏木、温图高勒苏木-拐子湖、巴音宝格德苏木以及绿城遗址附近区域),与传统道地产区基本吻合。此外,区划结果还提供了肉苁蓉传统分布区以外的新适宜分布区,为今后开展肉苁蓉人工引种栽培选址工作和区域发展名贵中蒙药提供了科学依据。

Ecology suitability study of Cistanche deserticola in Alxa

The distribution information of Cistanche deserticola was collected by interview investigation and field survey, and 55 related environmental factors were collected, the habitat suitability study was conducted based on geographic information system (GIS) and Maximum entropy model. The AUCs of ROC curve were both above 0.9, indicating that the predictive results with the maxent model were highly precise. The results showed that 14 major environmental factors have obvious influence on ecology suitability distributions of C. deserticola, including vegetation type et al, the suitable distribution areas are mainly concentrated in the central of Alxa Youqi, the north of Alxa Zouqi and the south-east of Ejin Banner, including Tamusu towns, Alateng towns et al, The zoning results basically coincide with the genuine producing areas, and further afford new suitable distribution areas, which can provide reference for the siting of introduction and cultivation of C. deserticola.