羊蹄甲属景观树种在广州市３种绿地类型中的应用

以广州市城市公园、主干道和高校3种绿地类型的羊蹄甲属（Bauhinia）景观树种为研究对象，采用分层抽样调查、查阅文献和访问调查方法，对羊蹄甲属景观树种在广州市绿地中应用情况进行研究，结果表明：广州市城区3种绿地中，共有5种羊蹄甲属树种，分别为宫粉羊蹄甲（Bauhinia variegata）、红花羊蹄甲（B．blakeana）、白花洋紫荆（B．variegata var．candida）、羊蹄甲（B．purpurea）、嘉氏羊蹄甲（B． galpinii）。其中应用最广泛的是宫粉羊蹄甲，其次为红花羊蹄甲；从生长指标来看，各羊蹄甲属树种均表现出良好的生态适应性；在配置方式上，公园绿地以自然种植中的群植为主，城市主干道和高校绿地以规则种植中的列植为主；在景观表征上，有67．3％样方的羊蹄甲属树种都居于林冠优势层或优势木空间窄小的亚乔层，能够充分发挥其林冠花和观叶的生态景观特征。

The application of Bauhinia in three types of green space in Guangzhou

The study focuses on the application of Bauhinia in city parks, main roads and university campus in Guangzhou city. The research method contained stratified sampling,literature review,and access method.The resuits showed that there were 5 species of Bauhinia found in Guangzhou,including Bauhinia variegata,B.blakeana,B.variegata var.candida and B.purpurea,and B.galpinii.Among them,the most widely used was B.variegata,followde by B.blakeana.All varieties showed dood ecological adaptability.Form the planting way of Bauhinia trees,the park green space was given priority to with group planting.The greenbelt in urban main road and university campus were given priority to with linear planting.About 67.3% of sampling plots,the Bauhina''s conopy was on the top or the middlie layer vertically which brings great horticultural value.