园林树木的修剪与整形.rar

    一、行道树的修剪与整形
      行道树是指在道路两旁整齐列植的树木，每条道路上树种相同。城市中，干道栽植的行道树，主要的作用是美化市容，改善城区的小气候，夏季增温降温、滞尘和遮荫。行道树要求枝条伸展，树冠开阔，枝叶浓密。冠形依栽植地点的架空线路及交通状况决定。主干道上及一般干道上，采用规则形树冠，修剪整形成杯状形、开心形等立体几何形状。在无机动车辆通行的道路或狭窄的巷道内，可采用自然式树冠。
      行道树一般使用树体高大的乔木树种，主干高要求在2m—2.5m。城郊公路及街道、巷道的行道树，主干高可达4m—6m或更高。定植后的行道树要每年修剪扩大树冠，调整枝条的伸出方向，增加遮荫保温效果，同时也应考虑到建筑物的使用与采光。
 
    二、杯状形行道树的修剪与整形
      杯状形行道树具有典型的三叉六股十二枝的冠形，萌发后选3—5个方向不同，分布均匀与主干成45°夹角的枝条作主枝，其余分期剥芽或疏枝，冬季对主枝留80cm—100cm短截，剪口

First, pruning and shaping trees
      Trees is the planting in the roadside trees in neat columns, each tree species in the same way. Cities, roads planting of trees, the main role is to beautify the city, improve the city's micro-climate, summer temperature cooling, dust and shade. Branch spread of trees required, crown open, branches thick. Crown by planting location decision of overhead lines and traffic conditions. Main roads and general roads, using the rule-shaped crown, trim the entire cup-shaped form, shape and so happy three-dimensional geometry. No motor vehicles are permitted in the road or the narrow alley, can use natural-style crown.
      Trees usually tall trees using tree species, trunk high demand in the 2m-2.5m. Suburban roads and streets, roadway trees, trunk up to 4m-6m high or higher. Year after planting the trees should be cut to expand the crown out to adjust the direction of branches to increase the insulation effect of shading, but also taking into account the use of the building and lighting.
 
    2, cup-shaped pruning and shaping trees
      Cup-shaped trees with typical trigeminal 6 Unit 12 of the crown-shaped, 3-5 after germination choose a different direction, into a uniform 45 ° angle with the trunk for main branch branches, or thinning the remaining bud stage stripping winter on the main branch stubs left 80cm-100cm, rhizoma