[planting strategy] when do jujube trees usually be trimmed? Teach you these 8 pruning techniques!

Jujube tree is a small tree growing in temperate zone. Proper pruning of jujube tree can cultivate tree shape suitable for jujube tree growth and high yield, achieve high yield effect and prolong fruiting life. When is the date tree usually pruned? What are the jujube pruning techniques?

When do trees usually grow?

Jujube pruning is generally divided into winter and summer shear two kinds.

1, jujube tree winter pruning time

Winter pruning is carried out during the dormancy period from defoliation to germination. Winter pruning in northern China is best carried out from March to April in spring to before germination, so as not to cause water loss and affect germination, pruning too late will weaken jujube growth; while in southern China, winter pruning is carried out at any time during the whole dormancy period.

2. Summer pruning time of jujube trees

Summer pruning is generally carried out when the new jujube heads germinate in spring every year, reach the growth peak, and enter the slow growth period. The purpose is to control the growth of jujube heads, cultivate healthy branches, and effectively control the vegetative growth to promote flowering and fruit setting. In the north, it is usually carried out from the end of May to the beginning of June. The early development of jujube head is small, and too late can not play its due role in regulating the contradiction between growth and fruit.

II. Pruning techniques of jujube trees

Jujube pruning methods are: thinning branches, short, retraction, picking, slow release, bud carving, pulling branches, wipe buds and other methods.

1. Thinning method

Method: thinning branches is also called thinning, thinning. That is, over-dense jujube heads, diseased branches, thin branches in the bore, useless long branches, drooping branches, cross branches and other branches are cut off from the base (see the picture below).

Function: Make jujube ventilated and transparent, grow normally, make branches evenly distributed, tree potential balanced, concentrate tree nutrition.

2. Shortening method

Method: Cut off part of the first or second branch of jujube head, and take different degree of truncation measures according to tree vigor, space and different purposes. (See below).

Function: Stimulate the germination of new jujube head, rejuvenate the remaining secondary branches and jujube strands, and reduce the drying and death of the rear secondary branches and avoid the occurrence of bare and bare phenomenon.

3. Retraction method

Methods: Retraction is also called back shear, retraction shear, that is, perennial extension branches, fruit branches cut, retraction is mostly used for backbone branches or branch groups due to years of fruit caused by bending droop or weak growth situation, select upper branches, buds for retraction pruning.

Function: Enhance tree growth potential.

4. Slow release method

Method: Do not prune the jujube heads reserved for lateral branches and lateral branches for extension, see the following picture.

Function: It can make the main bud at the top of jujube head continue to extend and grow, so as to expand the crown and increase the number of jujube strands.

5. Bud carving method (carving)

Method: Cut 1 cm above the main bud, deep into the xylem, see below.

Function: Promote the germination of main buds.

6. Branch pulling method

Methods: in the growing season with iron wire or rope, stick to open the angle of branches, will be available for the use of bore branches, excessive branches to the crown of the branch missing parts, see the following picture.

Function: to ease the tree vigor, improve the tree lighting conditions, improve the ability of the second branch to bear fruit.

7. Pinning method

Methods: In the growing season, when the jujube head grows to a certain length, remove a part of the tender shoot at the top of the newborn jujube head.

Function: By picking the core can effectively control the long growth of jujube head, so that the secondary branches left to extend the growth, increase the number of secondary branches, improve the number of new jujube head fruit.

8. Bud wiping method

Method: When jujube bud grows to 5-10 cm, the useless bud and twig sprouted on each part are wiped off from the root in time.

Function: The purpose is to reduce nutrient consumption, so that nutrients can be used on valuable branches to promote healthy growth and fruit bearing of trees.

Conclusion: jujube tree early pruning directly affects the late fruit set rate, so we should pay attention to reasonable methods to prune jujube trees in the growth stage, do not prune blindly, and take various pruning methods according to the actual situation.