What are the pruning methods?

(1) Thinning is also called thinning, and its main purpose is to keep the appearance of trees clean. Generally, it is important to prune excessively dense overlapping branches, irregular cross branches, unsuitable long branches, weak drooping branches, redundant inner cavity branches and basal sprouting branches, as well as dead branches, pests and diseases. It can improve ventilation and light transmission conditions, enhance assimilation efficiency and adjust the growth potential of trees. The thinning degree is generally divided into three types: the number of thinning branches does not exceed10% of the total number of branches; 10% ~ more than 20% is moderately sparse; More than 20% is heavy and thin. When operating, the incision should be smooth, which is often used for flowers and trees such as Maojuan, Rose, Peach Blossom, Plum Blossom, Begonia and Camellia. Generally, it is carried out after flowering or defoliation.

(2) Regeneration and rejuvenation can promote the growth of new branches by cutting bare old branches, diseased branches and damaged branches, so as to achieve the purpose of regeneration. Commonly used in flowering shrubs, such as Xiang Jie, Jin Zhonghua, Tang Di, Wei Zi and Chimonanthus praecox.

(3) Cut off all new branches and shoots again, leaving only the trunk and main branches, so that the plants are clustered. Generally, the tree species with flowering branches in that year are pruned again, such as hibiscus, winter jasmine, rose, ivory red and so on. Pruning should be done after flowering. Cut off all branches 5 cm above the base of the stem.

(4) Short cutting, also called pruning, is the most important measure in pruning. The whole plant should be cut off at the distance of 10 ~ 20 cm from the base of the trunk to promote the germination of new branches at the base or root of the trunk. It is often used when the plant is too high or the growth potential of the plant is extremely weak. Cut it short, and the plants will be rejuvenated. Different pruning degrees have different effects on the growth and flowering of flowers and trees. It is often divided into four categories: light short cut is 1/5 ~ 1/4 of the total branch length, medium short cut is 1/3 ~ 1/2, heavy short cut is 2/3 ~ 3/4, and extremely heavy short cut generally only keeps/4 of the base. Suitable for forsythia suspensa, Hypericum perforatum, Yunnan Yingchun, Yingchun, Chinese rose and other plants. Generally speaking, strong branches are weak and weak branches are strong.

(5) Nucleation can promote multi-branches, multi-buds and multi-flowers, and make the plant type more compact. Coring means cutting at the top of the stem and above the leaves, and the incision should be flat. During the growth period of plants, many times of coring treatment can be carried out to promote more branches, flower bud differentiation and plant dwarfing. Suitable for Acer truncatum, Acer truncatum, Ligustrum lucidum, most flowering shrubs, grass flowers and perennial flowers.

(6) Removing buds and stripping buds During the growth period, excessive lateral buds or new shoots are removed from flowers and trees to reduce nutrient consumption and concentrate nutrients for the development of main buds. Generally, the lateral buds are peeled off to avoid too many lateral buds, which will affect the growth of the main buds and make the flowers smaller. Commonly used in peony, rose, tea plum, peony, dahlia and other plants.

(7) After thinning the fruit and removing the residual flowers, for plants without seeds, the residual flowers should be cut off in time to avoid bearing more fruits and consuming nutrients. It not only beautifies plants, but also facilitates the formation of new flower branches, such as Mao Juan and Xifu Begonia. In order to ensure that the fruits of ornamental flowers and trees are big and bright, it is necessary to pick off too many young fruits as soon as possible. Suitable for pitaya, milk eggplant and other plants.

(8) Leaf removal In order to delay the growth of the plant and keep the leaves of the plant small and beautiful, all the leaves on the plant are cut off in May and June, and germinate again a few weeks later to grow new leaves. Suitable for Castanea henryi, Castanea henryi, etc. In addition, removing dead leaves and cleaning leaves when possible can not only beautify the appearance of plants and prevent the invasion of pests, but also be beneficial to the healthy growth of plants.

(9) When transplanting flowers and trees and changing pots, root pruning is often carried out. When transplanting, long taproots or injured roots need pruning. When changing pots, properly trim old roots, rotten roots and over-dense roots.