The principle and basis of shaping and pruning of Garden trees

The principle and basis of shaping and pruning of Garden trees

(1) the principle of shaping and pruning of garden trees

The shaping of garden trees refers to the use of certain pruning methods to prune plants, thus forming a certain form of tree structure, and tree shaping is accomplished by taking specific pruning technical measures. Pruning is achieved by pruning or thinning some organs of the plant, such as roots, stems, leaves, buds, flowers, fruits, etc., that is, to follow certain goal requirements on the basis of plastic surgery. Shaping and pruning are closely related and are technical measures unified under certain cultivation and management objectives. Different shaping and pruning measures will also get different results, and different greening objectives have their own specific pruning requirements. Therefore, first of all, the purpose, requirements and uses of the tree in landscaping should be determined.

(2) the basis of shaping and pruning of garden trees.

① is based on the growth, development and flowering habits of tree species. For some tall tree species with strong dryness, because

The growth ability of the terminal bud is particularly strong, and it is easy to form an obvious subordinate relationship between the trunk and the main and lateral branches, so the tree species with this habit should adopt the plastic method of retaining the central leading trunk. Most of the cultivated trees are steeple, conical, cylindrical and other trees, such as mountain dingzi, poplar, spruce and so on.

For some tree species whose growth power is not very strong, but the branching power is very strong, the tree species which are easy to form a clump crown can be shaped and trimmed into a spherical or semicircular tree shape, such as Mongolian oak, elm leaf plum, five-pointed maple and so on.

For light-loving and fruiting tree species, most of them use trunk sparse layer shape, small crown sparse layer shape, open heart shape and so on, such as apple, pear, peach and so on.

For the tree species that have the habit of sagging and sagging, the way of banding or natural drooping should be adopted to make the crown open in the shape of umbrella or branches, such as Robinia pseudoacacia, Ulmus pumila and so on.

② is based on the functional requirements of the forest. Trees follow different pruning requirements because of the different purposes of their application in gardens. Some trees have the same species, but they can have different applications, so their pruning requirements are not strict.

From the garden art requirements, there are natural, geometric shape, pruning is also different.

③ is based on natural conditions and growth potential. Under different natural conditions, the growth potential of trees is different, and their pruning methods and pruning degrees are even more different. For example: in the natural conditions, light, water, fertilizer and other conditions are poor, the growth potential is also weak, it needs to be cut lightly to ensure its ornamental effect is enough.

④ according to the needs of the cultivation environment. For example: when there is an empty line above the street tree, cut off the central leading branch (wipe head) when planting, shape the tree into a round head, and trim it into a cup-shaped tree when it is close to the wire.

⑤ according to pruning response. Pruning response is not only the basis of whether the pruning is reasonable or not, but also an important standard to test whether the pruning is moderate or not. Because the growth potential and growth state of branches are not consistent, the response of the same pruning method must be different. Therefore, it is necessary to investigate the pruning response of trees and check whether the pruning method and strength are reasonable, so that we can know well and prune reasonably in the future pruning work. When pruning, we should also consider the tree age, tree potential, the number of fruiting branches and flowers to determine the HJ. Therefore, pruning should be comprehensively considered to determine the pruning method and period, and trim into a reasonable tree shape.