Abstract: The arbuscular mycorrhizal status of 60 plant species growing in the dry-hot valley of Jinsha River was surveyed by means of acid fuchsin after the roots were lysised in alkaline solution. It was found that 70% of the species were arbuscularly mycorrhized. Most of the constructive species of the natural plant community and some species in Cyperaceae and Polygonaceae have arbuscular mycorrhizas. Arbuscular mycorrhiza is an important component in the dry-hot valley ecosystem. Thus it is essential to restore the vegetation of the dry-hot valley.

Key words: Jinsha River

摘要： 用碱解离、酸性品红染色法对金沙江干热河谷(元谋段)中生长的60种植物的丛枝菌根状况进行了调查。结果发现被调查植物中70%的植物形成丛枝菌根，干热河谷自然植物群落中的建群种大多具有丛枝菌根，一些莎草科、蓼科的植物也形成典型的丛枝菌根。丛枝菌根是干热河谷生态系统中的重要组成成分，在干热河谷的植被恢复中，必须同时考虑对地下植物共生真菌进行恢复。

关键词: 金沙江, 干热河谷, 丛枝菌根