1, planting time
Toona sinensis is suitable for planting in spring and can be planted when the temperature exceeds 5℃. Sowing can be carried out in early March in the southern region, and delayed appropriately in the northern region.
2. Seed selection
Choose excellent varieties according to your own situation, and focus on large, full, fresh, pest-free and incomplete seeds, so that the germination rate of seeds will be higher.
3, soaking seeds to accelerate germination
First, gently rub the seeds of Toona sinensis, then wash them and soak them in warm water, then take them out, drain the water and put them in a clean container to accelerate germination. When the temperature is kept at 25-30℃, the seeds can germinate in about 2-3 days.
Step 4 sow seeds
When most of the seeds of Toona sinensis are exposed, they can be planted. Sowing on demand should not be too deep, but should be watered after sowing. After the emergence of Toona sinensis seedlings, it is necessary to strengthen management, keep the soil slightly wet, increase light appropriately, and apply dilute nitrogen fertilizer to promote the growth of seedlings.
5. Transplanting and planting
When Toona sinensis seedlings grow to a certain extent, they can be planted and cultivated. The seedlings of Toona sinensis can be transplanted into the field, given sufficient light and reasonable water and fertilizer, so that the seedlings can grow faster.
6, watering method
When the new shoots grow to 3 cm, spray 0.25% urea to supplement nutrients and promote the seedlings to grow branches and leaves. Water frequently in spring, water frequently in summer, intertillage weeding, and determine the watering times according to local irrigation conditions and climate characteristics to promote the vigorous growth of plants.
7. Fertilization methods
The management of Toona sinensis is simple. If more fertilizer is applied during the maintenance period, the seedlings will grow faster, and the plant type will be fuller and taller. Potassium fertilizer is the main fertilizer for planting Toona sinensis, and regular topdressing makes the plant more branched. Fertilization can use solid fertilizer or liquid fertilizer, and liquid fertilizer has stronger absorption capacity and faster effect.
8, powdery mildew prevention and control methods
Powdery mildew of Toona sinensis is common, and yellow and white spots will appear on the leaves when it occurs. First, clean up diseased leaves and branches, strengthen ventilation, spray chemicals to control the disease, strengthen pruning and wound treatment, and reduce the threat of disease.
9, dry disease prevention and control methods
The incidence of dry young trees is relatively high, and the main harmful parts are branches, and small black spots will appear. First, control the spread of the disease, cut off diseased branches, disinfect wounds and avoid infection. Then spray medicine to kill the germs lurking on the trunk.
10, control methods of leaf rust
The main manifestations of leaf rust are rust spots on leaves, early leaf shedding, weak growth and small black spots on the back of leaves. First of all, early detection and prevention at the initial stage of the disease can quickly control the disease. You can spray 1-3 Baume lime-sulfur mixture for 2-3 times, with an interval of about one week each time.