对天水市城区行道树资源、使用频度、综合指数进行了调查分析。结果表明，天水市区行道树共有30种，隶属19科24属。其中重要值较高的行道树有侧柏、国槐、栾树、女贞、悬铃木。天水市区行道树多样性指数与物种丰富度呈正相关，秦州区的多样性指数及物种丰富度均高于麦积区。

The street trees resources，use frequency and composite index of Tianshui were investigated by field reconnaissance survey. The results showed that there were 30 species of street trees， belonging to 19 families and 24 genera. The high important value of street trees were Platycladus orientalis， Sophora japonica Linn.，Koelreuteria paniculata Laxm.， Ligustrum lucidum Ait.， Platanus acerifolia. The diversity index of street trees in Tianshui city was positively correlated with species richness. The diversity index and species richness in Qinzhou were higher than those in Maiji District.

S731.8

2018年天水市科技局科技支撑项目(2018-ZCFGK-3602)。