Jujube pruning technique

1. The tree-shaped selection of dense planting gardens should adopt three main branches and natural happy shapes. The tree is divided into two cases, the seedlings can be directly selected from the ground to maintain the main branch of the three main branches of the culture or no main stem natural happy shape, grafted seedlings culture to the main stem of three main natural happy shape. Broad-line narrow-strain planting blocks can be selected using two trunk "V" shaped tree.
2. The trunk height of the tree structure is 40-50cm, the main branch is 2-3, the main branch distance is 15-20cm, the branching angle is 50-70, each main branch leaves 2-3 lateral branches, and the first side branch is away from the center 35-40cm, lateral branches 40-50cm.
3, the method of pruning The pruning of jujube tree can be divided into winter pruning and summer pruning depending on the season.
(1) Common methods for winter pruning: Short cutting, tipping, retracting, thinning, changing heads and falling heads at branches.
(2) Common methods for summer pruning: jujube head topping, wiping buds, thinning branches, twigs, in addition to sprouting pods.
4. The first 1-2 years after the saplings are planted and colonized, when the saplings grow to 70-80cm, they are dried, and 4-5 secondary branches are cut off at the same time, and 3-4 jujubes are grown in the second year of spring. In the head and winter shear, one or two cultivars with good growth position were selected as the main branch culture. The short branch was used to promote the growth of the main branch. The other dates were used as the branch culture, and the main extension branch was treated as the first main column or The branch length of the second main branch was cut short, and 2-3 branches were cut off under the clipping, and the second or third main branch could be left in the third year of winter cutting, and the short cut was implemented. The collateral culture method is the same as that of the main branch, and the azimuth, angle, and branch pitch should be noted during the main lateral branch culture, and the resulting branch groups should be cultivated according to the spatial position.
5, the results of trimming dates 2-3 years after the beginning of planting, the results are still plastic at this time, taking into account the results, focusing on the training of all levels of sticks, expanding the crown, increasing the area of ​​results. On the backbone shoots, selected jujube heads with robust growth, similar position, laterality, and a large number of secondary branches and jujube stocks were used as the resulting branch groups. The results of the branches can not be too large and too much, usually 50-60cm choose to stay one, and staggered each other, inserted into the empty, so that jujube hanging jujube hanging, flowering results.
With the growth of tree age, the canopy is continuously expanding and the yield is continuously increasing. The tree vigor gradually weakens, the tip of the stem branches droops, the branches are slender, and the secondary branches begin to die. The ability of jujube heads to sprout secondary branches also weakens. Shares will age with them, resulting in reduced ability. Pruning at this time should maintain a robust tree vigor, regulate the relationship between growth and results, improve the light conditions within the canopy, extend the results of years, and achieve high and stable yields. The pruning principle is sparse, sparse and short.
Strong jujube trees that grow stronger, and new, robust jujube heads must be short-cut to promote the full growth of secondary branches and jujube heads. The backbone to be extended can shorten the thick jujube head and cut off the first and second secondary branches under the cut, so as to promote the formation of new jujube heads on the primary buds of the primary branch and improve the fruit setting rate. ,Increase production. Only light cut does not open A, you can accumulate new dates, but the ability to set fruit is low, affecting yield; only open A not pruning, can improve the fruit setting rate, but the new dates are not even able to pump new jujube head, weaken the tree Potential.
The weakly growing jujube tree, the jujube head grows weakly, the tip of the stem branches droops, and the second branch of the base is dry and the yield is reduced. Pruning at this time should retract the pendulous part of the stem, that is, cut off from the strong branches to raise the angle and enhance the tree vigor. Dry and dead branches and diseased shoots on the tree should be promptly removed. Close-packed branches and overlapped branches shall be interspared or retracted according to the situation, so as to improve the lighting conditions in the chamber.

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