1, because trees are pruned, they are shaped with branches. Under the condition of artificial cultivation, the pruning method and degree should be determined according to the biological characteristics, different growth and development stages, different tree ages, site conditions, target tree shape and other specific conditions of big cherry varieties in order to achieve the best pruning effect. Make it tangible and intangible. Building a tree can not affect the early yield, but also build a high-yield tree to make the growth and fruit balanced and reasonable.
2. Pay attention to summer pruning, pull branches and open corners to promote flowering. Big cherry should pay special attention to summer pruning, and take measures such as coring, wringing and ring cutting to promote the increase of branches and the formation of flower buds and improve early yield. When the branches grow to more than 20cm in spring, the main branches should be propped up with toothpicks, and the branches should be pulled well from July to September, so that vegetative growth can be transformed into reproductive growth, which is conducive to early flowering.
3. Strictly control the pruning period. Although the shaping of big cherry can also be divided into two periods: winter pruning and summer pruning, if it is pruned and sold in winter after defoliation and before germination, it will easily cause drying shrinkage and hair gel, consume a lot of water and nutrients, and even three branches will die. At the same time, pruning during dormancy only promotes local growth and weakens the growth of the whole tree. The greater the pruning amount, the greater the promotion effect on local growth and the stronger the weakening effect on the whole tree.
Therefore, the best pruning period of big cherry in winter should be from the time after sap flow to the time before germination. Young trees advocate pruning in summer, and trees in full fruit are suitable for pruning in winter, which must be mastered reasonably according to different tree ages.