Key techniques of Postharvest Management and Summer pruning of Cherry

In order to promote flower bud differentiation and prevent excessive vegetative growth, new shoot coring should be controlled. That is, to pick the coring of the new shoots that have not stopped growing, the position of the coring is generally bounded by the half-leaf; after the coring stops for 10-15 days, the second shoot will be sent out, and when it grows to 15-20 cm, the second coring will be carried out, and the position is still bounded by the half-leaf. After the cherry is harvested, the big branch with a small angle of the first-class branch can be pulled so that the angle between the cherry and the main branch is 70-80 degrees. It can improve the ventilation and light transmission of the tree, and ease the growth potential at the same time, which is very beneficial to the flower bud differentiation. Pay attention to the anti-injury pad at the binding point before pulling, so as to avoid pulling the cortex of the big branch. Too many big branches are pruned and the trees are closed, which is one of the important reasons for the weakness of cherry trees, the decrease of resistance and the occurrence of diseases and insect pests. Moreover, the younger the cherry branch is, the stronger the resistance is. A certain pruning of big branches can improve the overall stress resistance of cherry. At the same time, through pruning, too many flower buds are reduced to ensure a larger fruit in the coming year. To remove the big branches, we should grasp the following aspects: first, the pruning of the big branches should be carried out from the top to the bottom and should not be done in too much haste. The annual removal of large branches in summer is about 15% to 20% of the total, and it should be removed year by year according to the situation of the tree. it is generally appropriate to complete a round of pruning in 3-4 years. Keep the overall tree shape with sparse upper main branches and relatively dense lower main branches. Second, it should be carried out according to the length of the fruit branch. The longer the fruit branch is, the earlier it should be removed to promote the retraction of the fruit branch and the compact shape of the tree. Third, it should be selectively removed according to the growth of new shoots. If the growth of the new shoot is small, it should be removed first. The fourth is to remove the mastery of time. The removal of big branches can generally be carried out after harvest to mid-July, and in some cases, it can even be carried out during the fruit harvest period, such as cutting off the head in combination with cherry picking, sawing the overlong top branch with fruit, and picking fruit on the ground. In addition, sawing big branches should generally avoid periods of heavy rainfall to prevent glue flow. Note that when the big branches are removed, it is generally necessary to leave a certain length of branches at the pruning site to promote wound healing and prevent excessive retraction of fruit branches.