保定市城市森林的树木种类组成及其构成特征

Urban Tree Species Composition and Distribution Characteristics of Baoding City

为了解保定市城市森林的树木种类组成及其构成特征,对其城市森林6种类型的树木进行了抽样调查。结果表明:组成保定市城市森林的树木种类共有35科65属98种,其中本地种39种,引进种59种;树种属的区系地理成分以北温带成分为主,占其总属数的40.32%;其城市森林6种类型组成树木种类的多少从大到小依次为居民区林、企事业单位林、风景林、公用林、行道树、防护林;企事业单位林和居民区林的树种多样性最高,防护林的树种多样性最低。

Sampling survey was conducted on species of 6 forest types in Baoding city with the objective to understand the species composition and distribution characteristics of urban forests in this city. The results of survey indicated that there were totally 98 tree species in urban forests of Baoding, belonging to 65 genera and 35 families, among which, 39 species were native to Baoding and 59 species were introduced species. The floristic analysis suggested that the north temperate element was the dominant dement, which was accounted for 40. 32 %. The number of composed tree species of 6 forest types decreased in the order of residential area, institutional/enterprise area,scenic forest, public forest land, street tree and protective forest. The forests of institutional/enterprise unit and residential area had the highest species diversity and the protective forest had the lowest species diversity.