四川理县冬虫夏草资源分布及其与生境中植物多样性关系的研究

A Study of the Distribution of Cordyceps Sinensis and Its Relation with Plant Diversity in their Habitats in Lixian,Sichuan Province

对四川理县冬虫夏草资源分布进行详细调查,并对其分布特点与生境中植物多样性进行相关性分析,结果表明:冬虫夏草主要分布于海拔约4,500米高山草甸,伴生植物主要是蓼科、禾本科和莎草科植物,生境内植物种类较少,盖度较低,灌丛仅少量垫状灌木分布,很少有乔木出现。冬虫夏草的数量分布与生境内植物多样性指数没有明显相关性,并且放牧强度对冬虫夏草生境的多样性影响很大。

In this article, with a detailed investigation of the distribution of Cordyceps sinensis in Lixian, Sichuan province, a correlation analysis has been made between its distributing characteristics and diversity of plants in their habitats. The results indicate： the main habitats of Cordyceps Sinensis are Kobresia Meadows whose altitudes are about 4,500 meters. In the habitats, plants are rare, the cover degree is low, and is mainly covered with herbage. The shrubs are mainly short shrubs or cushion llke -shrub, the lofty arbors are uncommon. The main companion plants in the habitats are： Polygonaceae, Gramineae and Cyperaceae etc. Correlation analysis indicates that quantitative distributions of Cordyceps sinensis have no significant relations with diversity index. Additionally, grazing has significant influence on the distribution of Cordyceps Sinensis.