西安城市绿地植物多样性分析-《西北林学院学报》

文章信息/Info

Author(s):: OUYANG Zi-luo; JI Wen-li^*; YANG Mei; (College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China)

摘要:: 针对城市绿地的植物多样性问题，以西安市三环以内的公园、单位附属、居住区、广场、道路等不同绿地类型为调查对象，利用植物物种数量、重要值、丰富度指数、多样性指数、均匀度指数等指标对西安市城市绿地植物群落进行调查分析。结果表明，在调查范围内，共有树种176种，蔷薇科植物种数最多有30种，优势种主要有女贞、银杏、国槐、小蜡、石楠等。乔木与灌木的物种数比值为0.56，常绿与落叶植物的比值为0.65。乔木层Simpson指数、Shannon-Weinner指数、均匀度指数分别为0.648、0.980、0.893，灌木层的分别为0.456、0.891、0.512。不同绿地类型的绿地在植物物种分布、丰富度、多样性、均匀度上会存在差异性。西安市乡土树种占全部绿化树种的55.5%。研究可为西安城市绿化建设提供参考依据。

Abstract:: In order to understand situations of plant diversity in urban green spaces, a survey was carried out within "the Third Ring Road" in Xi’an in the green spaces of parks, institutions, residential areas, squares, and streets. The survey included plant species, important value, richness index, diversity index, evenness index and other indicators. One hundred and seventy six tree species were observed, the largest number of tree species was Rosaceae (up to 30 species). The dominant species were Ligustrum lucidum, Ginkgo biloba, Sophora japonica, Ligustrum sinense, Photinia serrulata,etc. Ratio of the species of trees to shrubs was 0.56, evergreen to deciduous plants was 0.65. The Simpson index, Shannon-Weinner index and evenness index of arbor layer were 0.648, 0.980, and 0.893, respectively. In contrast, the corresponding indices of shrub layer were 0.456, 0.891, and 0.512, respectively. Plant species distribution, richness, diversity and evenness varied in different types of green spaces. Native trees accounted for 55.5% of the greening trees. The results of the research can provide a reference for the construction of green spaces in Xi’an.