First, the improper use of winter cutting time and method of cherry growing vigorously, long or late fall, loose tissue is not full, trimming premature or short cut, improper branch position, easy to cause wound dehydration dry; spring and easy flow of plastic Affecting the normal growth of new shoots, the flow of glue can even cause dead branches and dead branches, leading to debilitating tree vigor. Large cherries are generally selected in mid-March to be most suitable for pruning near the bud. When pruning, cutting can not be kept too high or too low, shearing too high to heal slowly, easy to dry and flow plastic near the cut mouth; cut too low easily affect the bud growth point, the growth potential of new shoots weakened, cut surface should be With the bud top 45, the wound is easy to heal. The method of branching differs depending on the type of branches to be removed. When removing branches from one year, they can be cut short at the base of the flower buds, and should be removed afterwards. When the perennial branch is removed, the wounds should be flat, small, and free of blemishes. Can not be cut into "heavenly sky" This wound is difficult to heal, easy to cause decay of wood, affecting growth potential. Immediately after pruning, the wound is applied with sealer oil, fruit tree healing agent, etc. to promote healing and play a bactericidal action. Second, the pruning method is single, ignoring the comprehensive use of a variety of methods in large cherry pruning, there is eager to make the tree early shape, early results, blindly slow release or only sparse cut, open angle is not timely, resulting in rapid expansion of the crown, large branch Too much, too strong, excessive peripheral branches, too few internal branches, long branches, leading to poor light in the internal organs, nutrients can not be self-sufficient, resulting in premature aging and internal emptiness. In order to avoid the occurrence of the above phenomenon, a variety of methods should be applied comprehensively in pruning. The opening angles of branches should be combined with sparse and slow release, and the balance should be balanced after the promotion. Third, the pruning scale is not enough to grasp the pruning trim size can not be flexible, and the use of "one size fits all" method. If a short cut is used, the length of the short cut is not clear or the picking is too light, and the number of picking up is not enough to achieve the short-term purpose. The length of the short cut varies depending on the age of the tree and the characteristics of the variety. Saplings should be gentle on the branches, cut in the middle, generally about 50-60 cm short. After entering the result period, the short cuts may be aggravated, but special attention must be paid to the variety characteristics. For varieties with a strong tendency to flourish and a weak branching force, the results mainly in the form of bouquet-like fruit twigs, such as "Napoleon," should be cut short or heavy. For strong varieties, such as "big purple", pruning must be light, sparse strong peripheral branches, retracting upright branches, as long as possible put moderate growth, suitable thickness, smooth angle branches, for many years Relieve branches, retract or update.
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