Jujube pruning: how to prune jujube in spring?

How to cut jujube trees in spring? Please introduce the detailed method and function of jujube spring shearing from sprouting to flowering (from late April to mid-May). The common pruning methods are opening angle, scratching, sprouting, heart-picking and so on. Detailed operation can refer to the following: jujube tree opening angle with support, pull and other measures: open branches to the required angle and appropriate position. The main objects of opening angle are erect branches, parallel branches, crossed branches, overlapping branches and so on. According to the investigation, erect branches with a diameter of 3-4 cm and a length of more than 2 meters can only produce 1.5 kg of jujube, but after opening the angle to 60-70, the yield can be increased to about 5 kg. At the opening angle, it is necessary to prevent the branch from splitting and the branch cannot be drawn into a bow. Jujube tree engraving: carve a crescent shape on the top of the bud or the lower part of the branch (not more than 0.3 cm at the widest part of the two knives) and smear Chanhuawang No. 2. Promote fruit trees to regulate nutrition, blossom more, set more fruits, and completely balance the size of the year. Promote the germination of main buds, balance the tree potential and control the growth of strong branches. Jujube sprouting: after the jujube tree sprouts, when the buds grow to 5-10 cm, wipe off the unnecessary buds on the backbone branches in time, which can save nutrition and improve the fruit setting rate. Jujube heart-picking: mainly used for the sprouting shoots on the secondary branches of jujube. If this part of the twig is cut off together with the secondary branch, the fruiting area will be reduced, such as cutting from the jujube strand, the jujube hanging will no longer germinate on the jujube strand in the second year, and it is easy to stimulate the jujube head on other jujube strands of the secondary branch. after coring, the cut mouth is timely smeared with healing and anticorrosive film to protect the growth of wound healing tissue and prevent the infection of rot bacteria. The correct treatment should be below the permanent secondary branch of the twig, leaving two detached secondary branches to pick the heart, which can significantly increase the yield in that year, retain two shrunken buds at the same time, and sprout jujube and form jujube stock the next year. Control methods of jujube armyworm grafting methods of jujube trees