Street trees refer to trees planted on both sides of the road. Broadly speaking, it is also a tree similar to a tree. However, because street trees have special requirements and functions, there are also special requirements for the modeling and pruning of street trees. The function of street trees is mainly to shade the sun and improve the environment, so its crown size and height have a great relationship with its function. There are many kinds of street trees with different growth characteristics and ever-changing environmental conditions, so it is difficult to adopt the same model in the modeling and pruning of street trees. The pruning of cup crown is briefly introduced. This kind of shaping and pruning is generally divided into three stages: first, cultivating the tree skeleton. First, determine the height of the trunk, which is generally more than 4m, then choose to leave about 5 healthy and evenly distributed main branches, choose to leave good side branches according to the growth intensity of these branches, and then choose to leave 1 ~ 2 extension branches on each side branch to make the crown branches evenly distributed. In this way, after several years of transformation, the skeleton of street trees has basically taken shape. The second is to promote the formation of a crown as soon as possible. Pruning mainly adopts multi-leaf pruning and less pruning, mainly by dewatering. All branches that are too dense, too strong, cross and sick should be drained to support oblique branches and adjust the balance of tree potential. The third stage is to renew the crown. When the crown of street trees grows to a certain height and range, the growth potential of trees gradually decreases due to some environmental conditions. At this time, it is necessary to adopt newer methods to control the continuous expansion of the crown. Update pruning is generally to cut the branches with strong growth, remove the branches with poor growth potential at the base of the branch point, short and thin branches and small and thin leaves. There is a process of updating, which must be implemented year by year and gradually completed.

Cup pruning is not suitable for any tree species Only suitable for trees with strong germination and excellent pruning resistance, such as Platanus acerifolia, not suitable for trees with weak branching ability.