据笔者多年从事园林绿化积累的经验,城市行道树的树种搭配关键要把握好以下两方面的关系: 一是,树种搭配与植物抗性的关系城市行道树现在一般多采用单一的乔木树种,这样虽可使街道绿化整齐划一,更有庄严有序之感,但也存在单纯种植的弊病,由于纯林天敌资源缺乏,寄主之间没有差异,对病虫害抗力较弱,植物易于感病,若采用多树种混栽,不仅能增强树木对外界不良因素的抗性,而且对不同生物学特性的乔、灌、草所形成的多层次复杂结构,可以分层占有地下、地上空间,各树种在不同时期和不同层次利用光照、水份和各种营养物质,这对于人多地少的城市来说无疑是 According to my experience in landscaping for many years, the key to urban tree matching is to grasp the following two aspects: First, the relationship between tree species and plant resistance The tree trees in the city now generally use a single tree species, So that the street green uniform, more solemn and orderly sense, but there are also simple planting defects, due to the lack of resources of pure forest natural enemies, there is no difference between the host resistance to pests and diseases weak, susceptible plants, if the use of multi-species Mixed planting can not only enhance the resistance of trees to adverse factors, but also have the multi-level complex structure formed by the different biological characteristics of Qiao, Shrub and grass. They can occupy underground and aboveground space in different layers and in different periods Different levels of use of light, water and various nutrients, which for undoubtedly urban