Cherry branches can be divided into developmental branches and fruiting branches. Developing branches can sprout a large number of leaf buds, draw out new developing branches, and form the skeleton and the whole crown of the tree. Cherry fruiting branches can be divided into four types according to their length: long fruit branches, middle fruit branches, short fruit branches and bouquetlike fruit branches. Generally, fruit branches with a length exceeding 15 cm are called long fruit branches. Fruit branches with a height of 5 ~ 15 cm are called intermediate fruit branches; 2 ~ 5 cm is called short fruit branch; A fruit branch with 2 ~ 7 flower buds on a branch less than 2 cm is called a bouquet-shaped fruit branch. The proportion of all kinds of fruit branches is related to variety characteristics and fruiting years, and the proportion of long fruit branches in the early fruiting stage is higher than that in the full fruiting stage.

(2) Heterogeneity of buds

Bud heterogeneity refers to the difference in bud quality, germination ability and growth performance at different nodes of the same branch. Cherry buds can be divided into terminal buds and axillary buds according to their positions, and leaf buds and flower buds according to their properties. The top buds of cherries are all leaf buds, while axillary buds have both leaf buds and flower buds. On the developing branches, only a few buds at the base are small and shriveled, while the buds at the middle and upper parts are full, all of which are leaf buds, and there are usually one or two or three full leaf buds at the top. Generally, only flower buds are formed at the base or middle and lower parts of long and medium fruit branches, and the upper and terminal buds are leaf buds; Only the terminal buds of short fruit branches and leafy branches are leaf buds, and the rest are flower buds. The flower buds of cherry are pure flower buds. When pruning, the flower buds can't stay. For example, if the flower buds stay, they will become dry piles and die. The fruit on this leafless fruit branch is malnourished, small in size and poor in quality.

(3) Early maturity of buds

Cherry buds are similar to other drupe trees, and they are precocious. Picking the core and cutting the tip can promote the growth of secondary shoots. After flowering, the leaves of cherry blossom are about 10 cm, and can germinate 1 ~ 2 medium-long branches, and the lower part germinates to form leaf-watching branches; Keeping new branches 20 ~ 40 cm and removing new branches above 10 cm can promote the development of 3 ~ 4 medium-long branches; If the pinching is too light, only the medium and long branches in 1 ~ 2 can germinate. You can pick your heart 2 ~ 3 times a year. In plastic surgery, this characteristic can be used to enucleate the flourishing branch and the main branch for many times, thus expanding the crown quickly and speeding up the plastic surgery process. In the early stage of fruit, trees can control the crown, promote the formation of flower buds and cultivate fruiting branches by constantly re-coring.

(4) Germination rate and branching ability

The percentage of buds germinated on annual branches of cherry to the total buds is called germination rate, and the ability of buds germinated on annual branches to grow branches is called branch-forming ability. Compared with other fruit trees, the germination rate of cherry leaf buds is high, reaching more than 90%, but the ability to form branches is relatively low, which also varies with varieties and tree potential. The natural germination rate of big cherry is high, and the branch forming ability is low. Almost all the buds on the annual branches germinate into leaf branches, and the germination ability of adult trees decreases slightly. Plastic pruning should make full use of these characteristics, mainly in summer pruning, slow release, promotion and control, and promote the formation of flower buds. For varieties with weak branch forming ability, appropriate amount of short cutting is needed to promote long branches and increase the number of branches.

(5) Top advantages

Also known as polar growth, it can be divided into two categories. ? Top advantage: where the top bud of the branch has strong germination ability, the new bud grows vigorously, and the growth potential of the downward bud decreases in turn Strong branches or cuttings with strong buds have stronger top advantages. ? Vertical advantage: the growth potential of the upper branch on the back is strong, and the growth potential of the lower branch on the back is weak; The growth potential of extended branches of oblique branches and drooping branches is weak, while the growth potential of back branches is obviously strong. The terminal bud of upright branch has the above advantages, and the new shoot has the strongest growth potential. The larger the branching angle, the more dispersed the two advantages, making the growth potential tend to be flat. This feature is often used for pruning, such as pulling branches, holding branches, twisting tips, etc. It is necessary to increase the angle of branches, control the growth potential of tips, and enhance the tree potential by angle elevation.

(6) fruiting habits

The main difference between different cherry varieties in pruning is the type of fruiting branches. The varieties with short fruit branches are the main varieties, but there are fewer medium-long fruit branches. This kind of variety, represented by Naong, should adopt throwing pruning which is beneficial to the development of short fruit branches and increase the number of short branches. When the tree is weak, it should be properly retracted, so that the short fruit branches can germinate and develop branches, renew the branch groups, and then throw them. However, the varieties with long fruit branches have less fruit in short branches, such as big purple. In order to promote the development of medium-long fruit branches, it is necessary to combine cutting, releasing and shrinking. If you don't cut it short, the middle and long fruit branches will be significantly reduced. Variety types with the same proportion of long, medium and short fruit branches should be pruned moderately.