Preparation before planting:
1, planting point measurement
Before planting walnuts, according to the planting density and planting method planned on site, the planting points are measured according to the plant spacing. In the park with flat terrain, deep soil layer and good water and fertilizer conditions, the recommended planting density is 4x6—5x7 meters; In the park with poor soil and poor water and fertilizer conditions, the plant spacing should be smaller, and the recommended planting density is 3x5-4x6m.
2, site planting point preparation
Generally, the diameter and depth of planting holes should not be less than 0.8 ~1.0m. If the soil is sticky or the lower layer is gravel and impermeable layer, the planting holes should be deepened and exotic soil, fertilizer, peat soil or topsoil should be used to create good conditions for root growth and development.
Planting:
1, planting time
Why do you plant fragrant walnuts in spring or autumn? In autumn, planting should be completed after defoliation and before the soil freezes, and cold protection should be done well. Autumn sowing should be sooner rather than later; After the soil is thawed in spring, sow it before germination, and sow it later on the premise of ensuring that the seedlings do not germinate.
2, planting points
First, backfill the surface soil in the planting hole, shake the seedlings properly during the filling process, so that the roots extend downward and closely contact with the soil, then step on the periphery, then fill the soil flush with the ground, and fully step on it, so as to ensure that the roots, stems (the original soil mark position or the position where the lateral roots of the first layer are 3-4 cm upward, that is, the planting depth line position) and stubble of the seedlings are exposed from the ground.
Post-planting management
Post-planting management:
1, water after planting
After the walnut seedlings are planted, they must be watered for the first time to prevent the soil layer at the bottom of the pit from drying out, and the groundwater and groundwater cannot be connected, which will affect the survival rate of the seedlings.
2. The tree disk is covered with plastic film. After watering, covering the tree tray with 80- 100 cm square plastic film and a layer of soil can effectively preserve water, improve ground temperature, promote root growth and reduce weed growth. Pay attention to the use of thick shed film.
3. Autumn plants should be protected. Autumn sowing in northern areas must be covered with soil to prevent cold. In the following spring, after the soil is thawed, the seedlings should be dug out, watered and chopped in time.
4. Cut it short in time after planting, and the walnut seedlings must be cut short after planting (above the seam 10- 15 cm).
5. Prevent water loss.
After planting, the incision should be closed with adjusted paint to prevent the wound from losing water.
Step 6 protect the bud
When sprouting, we should pay attention to protect the new buds and prevent the harm of leaf-eating pests (weevil, scarab, etc.). ) spring. We can use screens or gauze as insect-proof bags and plastic belts to protect flower buds. Pay attention to the inside of the insect-proof bag to tie a small stick to hold the insect-proof bag to prevent the new strip from bending downward when it grows. When the insect-proof bag is slightly longer than 15-20cm, remove the insect-proof bag.
7. Remove the bud in time. When the sprouting strip grows to 10- 15 cm, select one bud with the strongest growth potential and smooth all others.
8. Strengthen fertilizer and water management to prevent and control leaf-eating pests.
When the new shoots grow to 15-20 cm, combined with watering, topdressing 50 grams of urea per plant, topdressing every 15-20 days/time; Top dressing 2-3 times in a row. At the same time, it should be combined with the prevention and control of leaf-eating pests (if the leaves are found to be eaten by insects, they should be sprayed in time for prevention and control). Spraying foliar fertilizer once every 7- 10 days, the foliar fertilizer can be mainly nutrient foliar fertilizer for promoting growth, or 2-3% urea can be sprayed.
9, inhibit the growth of branches in the middle and late stage, and promote the aging of branches.