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1. Pruning
Sapling: Shaping uses evacuation layered, open-hearted, multi-edged natural round-headed shape; dense planting garden adopts free spindle shape.
Result tree: due to tree pruning, with the branch shape, adjust the tree structure, rational arrangement of various types of stem branches; falling head control high, retracting drooping branches, redundant long branches, sparse over dense branches, thin branches, cross branches, overlapping Branches and so on.
The old tree: retracting the backbone branches, rejuvenating.
2. Qingyuan weeding
Combine winter shears, remove dead fruits, cut off diseases, insects, dead branches, and remove diseased trees. The deciduous weeds in and around the park are cleared and destroyed centrally to reduce overwhelming insect sources and pathogens.
Scrape off the rough skin at the main trunk and delivery site, and apply the white coating on the trunk to increase the cold resistance of the tree, and reduce the damage of jujube mealworms and jujubes.
3. Earth protection against cold
For saplings planted for 1 to 2 years old, a soil platform should be piled up at the base of the trunk to protect the soil from cold. Earthing height of about 30 cm, reducing evaporation of water, help young trees warm.
4. Soil fertigation
After the soil is frozen or after the soil is thawed in early spring, the height of the planting wall is increased to deepen the tree tray, which is beneficial to soil and water conservation, soil maturation, water storage and soil conservation, so as to remove insects, moths, larvae, and adults, thereby reducing soil insect populations. density.
Combining with soil preparations such as decomposed manure, manure and other organic fertilizers of 3 to 5 m3/mu, increase the storage nutrients of the tree to meet the needs of tree sprouting, flower bud differentiation, flowering and fruit setting in the following year.
5. Plastic skirt, spray lime sulfur mixture
In early March, a plastic band of 10 cm wide is placed around the base of the trunk at 30 cm, with the bell facing downwards. A layer of sticky insecticide is applied to prevent and control the larvae on the tree.
In the middle and late March of the year, 3 to 5 Baume degree lime sulfur was sprayed on the trunk to prevent and treat diseases and insects such as the red spider and the jujube leaf. When the juvenile wax turtle is severe, spray 10% to 15% diesel emulsion for prevention and treatment.
Jujube tree dormancy management
Jujube dormancy period (from November to mid-April of the following year) management is closely related to the quality of jujube fruit in the coming year and the level of yield. Therefore, it is very important to strengthen the dormancy management of jujube trees.