关键词: 植物, 植被类型, 兰州, 南北两山, 环境绿化

Abstract: The plants and vegetation types of the environmental afforestation project regions in the northern and southern mountains of Lanzhou were investigated. The results indicate that the vegetation types are relatively abundant, including 185 species which can be divided into 56 families; the growth status of the plants is good; the plant communities tend to be diversifying and their stability increase. According to plant community-ecology principle, the afforestation regions can be divided into 9 zones, including 2 natural plant zones and 7 planted zones. Considering present situations, it is better to plant mixed forests, strengthen the forest stability and its ability to resist plant diseases and insect pests, and simultaneously to promote forests renewing by artificial measures.

Key words: plant, vegetation type, Lanzhou city, northern and southern mountains, environmental afferstation project region