Wang Jiabo, Xiao Xiaohe, Huang Luqi, Chen Shilin, Wang Wenquan, Zhao Runhuai, Long Xingchao, Zhang Xueru, Xiao Peigen
China Military Institute of Chinese Materia Medica, 302 Military Hospital, Beijing 100039, China.
Zhongguo Zhong Yao Za Zhi. 2011 Feb;36(3):263-7.
To probe into the new idea along with establishment of a novel method for dynamic monitoring and early-warning on the wild resources of traditional Chinese medicines (TCMs).
The alterations of wild traditional Chinese medicinal resources were assessed through the price ratio between drug and foodstuff (PRDF) indicating the balance between supply and demand of the specific TCMs, referred to the price ration between pork to foodstuff which is used in national monitoring to the balance between pork supply and demand.
Since the price of rice was tightly controlled by government, it was selected as a relatively stable reference to build the PRDF in order to take away the non-marketing influence to TCMs price such as CPI and inflation rate. The modified relative alteration trend of TCMs price had been researched through comparing different formulae to build PRDF, including absolute average month price of TCMs, month average price ratio of TCMs to foodstuff (rice) , month-on-month change of TCMs to rice, year-on-year change of TCMs to rice, and difference in value of period-on-period change (DVPPC). In the research, Cordyceps, Glycyrrhiza and totally five herbs were selected as model drugs and the price data were collected from 2002 to 2008. The results showed that DVPPC calculated of relative long time window was more sensitive and stable to reflect the relative alteration trend of TCMs price. For instance, the DVPPC of Ligustici showed continuously increase trend in recent years. This suggested appearance of unbalance between supply and demand of Ligustici, and forced policy intervention to maintain reasonable and continuable utilization of Ligustici resource.
The proposed method and the formula of DVPPC revealed some useful guidance for dynamic monitoring the wild resources of TCMs.
探讨建立动态监测和预警中药野生资源的新思路与新方法。
通过药物与食品价格比（PRDF）评估野生中药资源的变化，该比值表明特定中药的供需平衡，参考国家监测中用于猪肉供需平衡监测的猪肉与食品价格比。
由于大米价格受政府严格控制，故选择其作为相对稳定的参考来构建PRDF，以消除诸如消费者物价指数（CPI）和通货膨胀率等非市场因素对中药价格的影响。通过比较构建PRDF的不同公式，研究了中药价格的修正相对变化趋势，包括中药绝对月均价、中药与食品（大米）的月均价比、中药与大米的环比、中药与大米的同比以及同期变化值差（DVPPC）。研究中选取冬虫夏草、甘草等共五种药材作为模型药物，并收集了2002年至2008年的价格数据。结果表明，较长时间窗口计算的DVPPC对反映中药价格的相对变化趋势更为敏感和稳定。例如，近年来川芎的DVPPC呈持续上升趋势。这表明川芎的供需出现失衡，需采取强制性政策干预以维持川芎资源的合理可持续利用。
所提出的方法和DVPPC公式为动态监测中药野生资源提供了有益指导。
