China Garden Network August 28 news: The United States red maple, Eucalyptus is a genus of eucalyptus, native to the eastern coast of the United States, deciduous trees. Faster growth, adult tree height of 12 to 18 meters, 12 meters crown, can adapt to a wide range of soil type growth. Spring blossom, flower red. Due to its colorful autumn colors and canopy neatness, it is widely used in parks, communities, and streets to plant trees. It can be landscaped and landscaped. It is deeply loved by people. It is an ideal and rare landscaping and greening garden that was introduced in recent years. One of the trees. The nursery technology is summarized as follows:
First, nursery selection and processing
The American Red Maple nursery should choose sandy loam with slightly acidic, moist, good water permeability and good irrigation conditions. Before sowing, 5000 kg of organic fertilizer and 50 kg of NPK ternary compound fertilizer are applied per acre. In order to prevent seedling pests and diseases, especially the underground pests, 8~10kg of ferrous sulfate and 2kg of phoxim granules per mu need to be mixed with fine soil and sprinkled on the surface, and then deep plowing, fine pounding, and flat plowing are required. It is 1 meter wide, 30 centimeters wide and 20 to 30 meters long.
Second, seed treatment, sowing time and method
The American Red Maple Seed is not dormant, and it can be used for both autumn and spring sowing. Now it mainly introduces spring sowing. The sowing time is appropriate from mid-March to mid-April. Before sowing, mix the seed and wet sand in a ratio of 1:3 and put them on a low-temperature sand trap for 3 months at 3～5°C. During the stratification period, regular inspections and management are required, and germinating seeds are found and sowing must be carried out in a timely manner. When planting, first fill the bottom water in the pot and wait for the water to seep and sow again. The sowing volume per square meter is about 200 grains. After sowing, it is necessary to cover 0.5 cm of fine soil, in order to keep the ground warmer, so that the seed germination early, budding and neat, can cover the film or small arch shed, arch shed should pay attention to ventilation, noon temperature should exceed 30 °C appropriate shade. Generally about 15 to 20 days after sowing, the seedlings will be produced.
III. Seedling management and growth
After the seedlings are unearthed, the growth is slower in the initial stage, and the resistance difference is often to spray water to keep the soil moisture, and weeds should be promptly removed. When weeding grass, we can scoop the soil in time and try to cultivate as much soil as possible to prevent lodging. When the seedlings grow to 5 cm in height, they will be seedlings, usually after irrigation, and the weak, sick and seedlings will be removed at intervals of 10 to 15 cm to keep the seedlings robust and tidy. Where the seedlings are lacking, rainy days are recommended for transplanting with soil balls. . In early June, topdressing urea with water, 15kg per mu, in mid-July, topdressing urea 10 ~ 15kg per mu, appropriate water control in the later period. If pests such as moths are found, they can be sprayed with 2.5% deltamethrin 4000 times for control.
The seedlings can reach a height of 1 to 1.5 meters in the year and can be planted in the second spring.
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