Positive tree species in warm temperate zone. I like sunshine, and the climate is so dry. Cold-tolerance, heat-tolerance and drought-resistance are not strict with the soil. Plain, sandy land, valleys and mountains can grow except marshland and heavy alkaline soil, and the pH adaptation range is between 5.5 and 8.5, with fertile slightly alkaline or neutral sandy loam growing best. Developed root system and strong tillering ability.
Second, the planting density
Planting specifications of jujube trees: the plant spacing is 3× 3m, with 74 plants per mu, and the planting time is 65438+February.
Third, the planting method
Dig a long, 80 cm wide and 60-80 cm deep planting pond before planting. When digging a pond, the topsoil and subsoil are stacked separately. Grass or straw is placed at the bottom of each pond. In the middle layer, 50kg of decomposed farmyard manure is mixed with topsoil and backfilled, and then the subsoil (preferably all topsoil) is returned to the field. When the planting pond is backfilled, it should be 30 cm above the ground or 20 cm below the ground to make the soil in the pond sink. When planting, dig a hole 20-30 cm deep in the planting pond, put jujube seedlings in the center of the hole, and lift them while filling the soil, which is practical. After covering the soil, the planting depth is slightly higher than the ground, which is consistent with the seedling depth of the nursery. It is not allowed to plant too deep (buried in the joint) or too shallow. After planting, a circular tree tray with the diameter of 1 m is formed around the seedlings, and the tree tray is covered with a film (the size of one square meter), which has the functions of moisturizing, warming and inhibiting weeds. When digging the pond for planting, stay wires to ensure that the seedlings reach the "three-look" line after planting.
Fourth, fertilizer and water management.
After young trees are planted, topdressing 10- 15 days before germination in spring, each plant should be topdressed with 1-2 and 10 kg of water, and then the operation (irrigation topdressing) should be repeated every other month, and the topdressing position should be 30-40 cm away from the trunk.
Five, plastic pruning
After planting jujube trees, cut off roots, buds and redundant branches. When the trunk 1.2- 1.5 cm thick and the secondary branch is 0.8 cm thick, the trunk shall be cut off at a distance of 60-80 cm from the ground, and the primary secondary branch below the section. Three suitable secondary branches 1 buds were selected for short cutting to promote the formation of primary lateral branches. Smoke resistance. Not resistant to water mist.