Fan Jiu-Yu, Ding Rong, Zhao Ming-Ming, Wang Meng, Gu Rui, Zhong Shi-Hong
College of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137, China.
College of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137, China State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medicinal Science, University of Macau Macau 999078, China.
Zhongguo Zhong Yao Za Zhi. 2020 Aug;45(15):3631-3641. doi: 10.19540/j.cnki.cjcmm.20200527.103.
Zha-xun is widely used in Tibetan medicine and is also an international traditional medicine. This study believes that the black organic matter constituting Zha-xun is mainly stored in the rocks. The exudation points of Zha-xun mostly distribute on the cliffs of high mountains, which makes it difficult to evaluate its resource distribution and storage area. This paper was aimed at the exudation environment of Tibetan medicine Zha-xun in Sichuan province and 6 ecological environmental factors of the Zha-xun were determined via the field investigation. Combining with these 6 factors as well as the GIS data of Sichuan province, ArcGIS software was used to extract ideal environmental factors which are suitable for exudation of Zha-xun, including geology types, geomorphological types, altitude, slope, vegetation types, and mean annual temperature. The spatial overlay analyses on the extracted environmental factors were carried out to predict the distribution area of Zha-xun in Sichuan province. Afterwards, field investigation was conducted to verify the prediction. The prediction showed that the exudation spots of Zha-xun in Sichuan province mainly located in 29 counties including 12 in Aba Prefecture, 15 in Ganzi Prefecture, and Muli County and Dechang County in Liangshan Prefecture. The deposit areas of Zha-xun were located in the Triassic, Devonian and Silurian strata and were basically distributed in 9 basins, including Dingqu River, Yalong River, Xianshui River, Dadu River, Suomo River, Minjiang River and Baishui River, characterized by a fragmented patch-like distribution along the mountain ranges, and the exudation spots of Zha-xun were mainly scattered among the rain-free cliffs' concavities of river valleys at a certain altitude. The prediction was consistent with the field investigation results, which suggested that it is possible and feasible to predict distribution of Zha-xun resources based on GIS-analysis. The study may provide a scientific basis for comprehensive investigations into Zha-xun's distribution and formation mechanism, thus promoting rational development and utilization of Zha-xun resources.
渣驯在藏药中广泛应用，也是一种国际传统药物。本研究认为，构成渣驯的黑色有机物主要储存在岩石中。渣驯的渗出点大多分布在高山悬崖上，这使得难以评估其资源分布和储存区域。本文针对四川省藏药渣驯的渗出环境，通过实地调查确定了渣驯的6个生态环境因子。结合这6个因子以及四川省的GIS数据，利用ArcGIS软件提取适合渣驯渗出的理想环境因子，包括地质类型、地貌类型、海拔、坡度、植被类型和年平均气温。对提取的环境因子进行空间叠加分析，以预测四川省渣驯的分布区域。之后，进行实地调查以验证预测结果。预测结果显示，四川省渣驯的渗出点主要位于29个县，其中阿坝州12个、甘孜州15个以及凉山州木里县和德昌县。渣驯的沉积区域位于三叠纪、泥盆纪和志留纪地层，基本分布在9个流域，包括定曲河、雅砻江、鲜水河、大渡河、梭磨河、岷江和白水河，其特点是沿山脉呈破碎的斑块状分布，渣驯的渗出点主要散布在一定海拔的河谷无雨悬崖凹处。预测结果与实地调查结果一致，这表明基于GIS分析预测渣驯资源分布是可行的。该研究可为渣驯分布及形成机制的综合调查提供科学依据，从而促进渣驯资源的合理开发利用。
