Planting techniques of American red maple

American red maple is a plant of the genus Acer of Acer family, also known as Canadian red maple, native to the east coast of the United States, deciduous trees. The adult tree has a height of 12 to 18 meters and a crown width of 12 meters, which can adapt to a variety of soil types. Blossoms in spring and flowers are red. Because of its eye-catching color and tidy crown in autumn, it is widely used in parks, residential areas and streets. It can be used as both landscape and street trees. It is deeply loved by people and is one of the ideal rare tree species introduced in recent years to beautify and afforest urban gardens.

Ecological characteristics

Like water and fertilizer, low temperature (about 40 degrees below zero), salt and alkali tolerance, the fastest growth rate in Shandong Peninsula, Rizhao area, which is consistent with the latitude in North America, climatic conditions, temperature conditions are basically the same, the annual growth is up to 80-120 cm, autumn discoloration is the most prominent, the most unified.

Main characters

Up to 30m, crown width 10m, leaf palmately 3-5-lobed, leaf length 10CM, leaf surface bright green, leaf back whitish, some white villi. The new leaves turn red in spring and contrast with the clusters of red flowers; the branches and leaves become overcast in summer; the leaves are gorgeous red in autumn and last for a long time. The tree is upright and the crown is round. Small red flowers bloom in spring, fruit winged, red. This tree species grows rapidly and is the fastest growing variety of all red maple varieties.

Habitual characteristics

Strong adaptability, cold tolerance, drought tolerance, moisture tolerance. The climate of Beijing, Hebei, Shandong, Liaoning, Jilin, Henan, Shaanxi, Anhui, Jiangsu, Shanghai, Zhejiang, Jiangxi, Hunan, Hubei, Yunnan, Sichuan, * * and other places in China is suitable. Every autumn pure improved red maple can steadily show gorgeous red leaf effect, acidic to neutral soil makes autumn color more colorful.

Seedling raising technique

1. Nursery site selection and treatment: for raising seedlings of American red maple, sandy loam with slight acid, moisture, good water permeability and good irrigation conditions should be selected. Before sowing, organic fertilizer 5000kg and NPK ternary compound fertilizer 50kg were applied per mu. In order to prevent seedling diseases and insect pests, especially underground pests, ferrous sulfate 8~10kg, phoxim granule 2kg, and fine soil should be mixed well per mu and sprinkled on the surface, then deep ploughing, raking and leveling should be carried out. The width of the border is 1 meter, the width of the ridge is 30 cm, and the length of the border is 20-30 meters.

2. Seed treatment, sowing time and method: American red maple seed has no dormancy, so it can be sowed in autumn or spring. The suitable sowing time is from mid-March to mid-April. Before sowing, mix the seeds with wet sand at 1:3 and store them at low temperature for one month under the condition of 3-5 ℃. During the stratification period, regular inspection and management should be carried out. If germinated seeds are found, they should be sown in time. When sowing, first fill the border with enough bottom water, wait for the water to seep down and then sow, about 200 seeds per square meter. After sowing, the soil should be covered with 0.5cm fine soil. In order to preserve the soil moisture and improve the soil temperature, the seeds can sprout early and neatly, which can be covered with plastic film or a small arch shed. The arch shed should pay attention to ventilation, and the noon temperature should be shaded properly when the temperature exceeds 30 ℃. Generally, the seedlings will come out about 15-20 days after sowing.

3. Seedling management and growth: after the seedlings are unearthed, the initial growth is slow, poor resistance should often spray water, maintain soil moisture, and remove weeds in time, while weeding, cultivate more soil as much as possible to prevent lodging. When the seedling grows to 5 cm high, it is generally carried out after irrigation, to remove weakness, disease and seedlings according to the spacing of 10-15 cm, to keep the seedlings strong and tidy, and to transplant seedlings with soil balls in rainy days where there is a lack of seedlings. Urea was topdressing with watering at the beginning of June, 15kg per mu, and urea 10~15kg per mu in the middle of July, and water was properly controlled in the later stage. If pests such as diamondback moth are found, 2.5% deltamethrin 4000 times solution can be sprayed for control.

The height of the seedlings can reach 1 to 1.5 meters in that year, and can be replanted in the next spring.