Detailed Explanation of the Methods and Key Technical Points for Trunk Training of Jujube Trees

The methods for trunk training of jujube trees are the clean-trunk method and the trunk-cutting method. (1) Clean-trunk method: every year, remove the secondary branches on the trunk and any development branches that are too low; the height of trunk cleaning should not exceed one third of the tree height, ultimately leaving a trunk height of 1 m. It is suitable for cultivars with weak tree vigor, medium branching ability, an open tree shape, and relatively easy shaping and pruning. (2) Trunk-cutting method: first determine the shaping zone 4 to 5 nodes above the trunk-training height for cultivating the first layer of scaffold branches, cut off the part above it; for the secondary branches within the shaping zone, keep 1 to 2 nodes at the base, and remove all those below. Heavily cut back the secondary branches within the shaping zone so that the scaffold branches emerge from the secondary branches as much as possible, increasing the spread of the scaffold branches and helping young trees take shape early.