为摸清天水市麦积区古树资源分布状况，2020 — 2021年采用“古树名木信息管理系统”和古树名木App管理软件对天水市麦积区区内现存古树资源(古树及古树群)进行调查。结果表明，分布于麦积区的古树有333株，隶属23科28属34种(含种下等级)，其中一级古树110株，二级古树61株，三级古树162株。现存古树群7个。古树区域分布以甘泉镇最多，有74株；马跑泉镇和麦积镇较多，分别有66、52株。约70%的古树生长势处于濒危衰弱状态。古树科层面的分布区类型有5种，分布区变型有1种；古树属层面的分布区类型有7种，分布区变型有3种。古树区系主要特征为北温带区系成分占优势，表现植物区系由亚热带向温带过渡的特点。

To understand the distribution of ancient tress resources at Maiji District, from 2020 to 2021, ‘Information Management System of Ancient and Famous Trees’ and supervisory software， Ancient and Famous Trees App were used to investigate resources of ancient tress and tree groups at Maiji District in Tianshui. Results showed that 333 ancient trees were found at Maiji District affiliated to 34 species (or subspecies)， 28 genera and 23 families in which the numbers of first， second and third class of ancient trees were 110， 61 and 162， respectively， and the number of ancient tree groups was 7. Ancient trees were mainly distributed at Ganquan Township (74 trees)， followed by Mapaoquan Township (66 trees) and Maiji Township (52 trees). 70% of the ancient trees were found in endangered and weak state. The numbers of distribution type of family and distribution subtype of family were 5 and 1， respectively， the numbers of distribution type of genus and distribution subtype of genus were 7 and 3， respectively. North temperate flora characters were found to be dominant which showed the characteristics of transition from subtropical zone to temperate zone.

S757.2

甘肃省高校大学生就业创业能力提升工程项目(2019A-209)、甘肃林业职业技术学院自然科学项目(GSLY2020- T01A)、天水市住房与建设局建设工程项目 (TGJS2020-080)、天水市麦积区科技计划支撑项目(2021)。