Take back the pruning. Trees that bear fruit in that year should be pruned about 15 days after fruit picking. During this period, litchi varieties with vigorous growth, such as Feizixiao, can be pruned again, and litchi varieties with relatively weak growth, such as Yubao, can be pruned slightly. Trees that did not bear fruit in that year were pruned on the old and new branches, which were generally divided into two times: the first time when litchi did not blossom or bear fruit in March-April, the pruning position was generally at the node between the autumn shoot of the first canopy and the autumn shoot of the second canopy last year, and the second time was slightly pruned in June-July to achieve the purpose of updating and promoting branches.

Sparse branches. Generally, every time the new shoots turn green, the new shoots should be properly thinned, that is, the weak branches should be thinned from the base of the branches. Generally, 2-3 branches are reserved for the first sprouting after fruit harvesting, and the rest are thinned. After the first pruning of fruitless litchi trees, 2-3 branches are left for the first time, and the rest are thinned.

Pick your heart. This measure is used to adjust the injection cycle. Picking premature branches, delaying germination time, and making them shoot at a suitable time, generally, pinching can delay shooting 10- 15 days.

Young tree shaping and pruning: Young tree shaping mostly adopts the round head shape of the main branch, which is completed within 2~3 days after planting. Pruning and shaping of young trees are carried out simultaneously. Before the new shoots germinate, methods such as removing the core, cutting short, draining and smearing buds are used to inhibit the growth of branches and promote branching. It should be light rather than heavy, mainly cutting off cross branches, over-dense branches, bent branches, weak branches and ears that don't allow them to bear fruit, so that nutrients can be effectively used and the crown can be expanded. After pruning, the wound is coated with antiseptic film to make it heal quickly.

Pruning of fruiting trees: Autumn shoots are the fruiting mother branches of litchi, and generally only 1~2 new shoots are cultivated. 1 The shooting conference will be held in the middle and late July; The second shooting release should be in late September. According to the needs of plants, water and fertilize reasonably, and spray new high-fat film to protect fertilizer and moisture.

Post-harvest pruning: after fruit picking, cut off the damaged fruit stems, dead branches, dead branches and non-ideal branches in time, as well as the new shoots in late autumn after summer heat; Try to keep positive branches, strong branches and well-growing horizontal branches. After pruning, clean up the site in time, concentrate on harmless treatment, then stick a layer of calluses antiseptic film on the trimmed wound to make the wound heal quickly, and spray tree protectant to overwinter safely. For reference?