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First, the citrus tree shaping
Improper shaping of citrus saplings will affect the growth of citrus, often delaying 1-2 years into the plentiful period, and sapling shaping is still a technically intensive job, which is also time-consuming and laborious. For this reason, the current two years after the citrus planting is generally not specialized plastic surgery, but let alone grow, when the tree crown grows to a size of about 1 meter, the branches or branches that severely affect the shape of the tree branches or branches, so that the large branches of space The distribution is basically reasonable. However, in the sapling stage, the following tree-shaped work should be carried out:
1. Trunk straighten After some citrus seedlings are planted, the trunk will be inclined due to the relatively high trunk, or the wind in the planted place, etc. The trunk will be tilted, and a pillar (bamboo pole or wooden strip, etc.) shall be erected beside the inclined trunk and be roped. The trunk is fixed on the pillar and tied upright.
2, eradicate the sprouts of the rootstock citrus saplings stage, sometimes sprouting on the rootstock, grow the rootstock branches and leaves, once found to erase in time.
3. Remove excess buds on the trunk in time. If there are already 3-5 large branches on the trunk of citrus, they can be cultivated into main branches, and sprouting strong sprouts on the main trunk. This excess sprout should be put in as soon as possible. erase.
Second, adult tree pruning
1. Pruning during full fruit period uses pruning to adjust the balance of tree growth and results, overcoming the size of the year. Trim to grasp the following principles:
(1) Remove the large branches of the shelter cover: After the high yield, the outer branches of the tree crown are denser, and some large branches of 2 to 3 years old can be sparsely cut to improve the illumination of the inner canopy. The weak branches on the inside and the lower part of the canopy should be sparsely covered with some weak branches and some with short cuts.
(2) Branch rotation compression pruning: Each year, the whole tree selects about 1/3 of the results. Branches rotate in turn to promote a batch of new branches, which can make the crown tight and productive.
(3) Cultivation results Mother shoots: Longer spring and summer shoots, leave 8-10 leaves as early as possible to pick up the heart, and take out the strong autumn shoots.
(4) Results Pruning of the branches: After the fruit is picked, pruning is performed according to the strength of the branches. The branches were weak and shrunk to the branches with strong branches; the branches were strong, only the apexes were shrunk and sheared, and the branches were weak and drooping.
(5) Pruning of auxiliary branches and pendulous branches: Insufficient illumination of the auxiliary branches inside and under the canopy, and as a result, the branches may be recessed and can be gradually removed or updated. After drooping the result, cut off the drooping part.
2. Pruning of old and young trees
(1) Pruning of the old year tree: In summer, pruning increases the amount of pruning, and the tree crowns are adjusted by using the methods of thinning, short, and shrinking. Sparsely cut the upper and middle branches of the tree crown and the dense and weak branches, cross branches, and disease branches and branches; the short section results in the branch group; at the height of the crown, two thirds, retract part of the perennial branches. To make the crowns airy and transparent, to achieve a three-dimensional result.
(2) Pruning of the young tree: After the fruit is picked, the branches and leaves should be kept as much as possible, except for cutting the branches and stems and stem branches.
3, pruning of aging trees According to the degree of tree weakness, to carry out different levels of pruning.
(1) The tree begins to age: The tree retracts 1/3 lateral branches and small lateral branches each year, and the tree canopy is renewed in 3 years.
(2) The tree is relatively weak: the tree is pruned and trimmed on the 5th to 6th branches, and only the main side branch is retained. The production can be resumed in two years.
(3) The tree is seriously debilitating: it should be eliminated and replanted.
Late Ripening Citrus Tree Pruning
The saplings are mainly pruned with light shearing, and the main branches of the trees are carefully selected or chopped, or the overlying branches of the branches are sparsely cut to adjust the growth potential and direction of each stem branch and cultivate a reasonable tree shape. Keep lychee as far as possible. The results were pruned before the sprouting of the spring buds, mainly retracted or short-cut after the results of the branches, falling branches and fallen branches, and the branches of the recession branches, and the oversized branches were deleted; The sparse cutting of cross-cutting techniques of the cross plants is beneficial to improving the illumination of the crown. For the plants after the juvenile results, a short section or most of summer and autumn techniques will reduce the amount of flowers and promote new shoots; Mainly, as far as possible to retain the summer, autumn shoot nutrition branches so that the results. For the prosperous tree that is not easy to flower, after the growth of the autumn shoot is stopped, twisting branches or ring cutting are performed to promote flower bud differentiation.