Spring is the suitable period for shaping, pruning and opening branches of big cherry in germination period (before germination). Pruning too early, the wound loses water and dries up, and it is easy to flow glue in spring, which affects the growth of new shoots. Severe gum flow will cause branches to die. According to the survey, in June 5438+February, branch shorts accounted for 36%; Pruning before germination is the lightest, accounting for only16%; In summer, after June, the amount of glue from scissors is 18%.

From the first ten days of June to the middle of June, the time of glue discharge from the incision is the shortest and the glue discharge is the lightest.

The opening angle of main branches should be carried out before and after germination. At this time, the branches are easy to pull and not easy to break.