First, the growth characteristics of the United States Red Maple American Maple, Eucalyptus Eucalyptus, also known as Canada Red Maple, native to the United States east coast, deciduous tree. Faster growth, adult tree height of 12 to 18 meters, 12 meters crown, can adapt to a wide range of soil type growth. Fast growth, moisture resistance, anti-pollution. The leaves are 3-5-lobed, 10 cm long, and the leaves are dark green. In autumn, the temperature changes to red, orange-red or yellow, and amber. Spring flowers, dark red flowers, fruit wings. 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. Second, nursery selection and processing Third, seed processing 1. Fresh untreated wet seeds can be sown directly. Fourth, sowing Establish a 1-2m wide seedbed, dig a good drainage ditch, loose the seedbed, and remove large pieces of soil. Apply a certain amount of organic fertilizer to the bottom of the seedbed when arranging the seedbed, which will help the seedlings grow vigorously in the late stage of emergence. When planting, first fill the bottom water in the pot, wait for the water to infiltrate and sow again (watering after sowing). The sowing volume per square meter is about 200 grains (2.6 kg per mu). The seedbed can be planted, and the seeding quantity can be adjusted according to its own conditions. The more sparse the seedlings are, the more difficult it is to manage seedlings, and the more intensive it is, the easier it is to manage, but the seedlings are too crowded and easy to lose. The sowing depth is appropriate to about 1cm, and 0.5cm of fine soil should be applied after sowing. In order to keep the ground temperature high, the seeds can germinate early and buds are neat and can be covered with a plastic film or a small arch shed. The arch shed should be ventilated. The temperature should exceed 30 °C in the noon to shade properly. Timely replenishment to maintain a certain humidity in the seedbed. Generally about 15 to 20 days after sowing, the seedlings will be produced. V. Seedling management and planting
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The American Red Maple nursery should choose sandy loam with slightly acidic, moist, good water permeability and good irrigation conditions. Before sowing, 5000kg of organic fertilizer and 50kg of NTPK compound fertilizer are applied per acre. In order to prevent seedling pests and diseases, especially the underground pests, 8 to 10 kg of ferrous sulfate and 2 kg of phoxim granules per mu need to be mixed with fine soil and sprinkled on the surface, and then deep plowing, squeezing, and smoothing. It is 1-2 meters wide and 30 centimeters wide.
2, the spring sowing, sowing time in mid-March to mid-April is appropriate. Dry seeds are soaked in 0.1% to 0.2% potassium permanganate solution for 2 to 3 hours, rinsed in clean water and soaked in warm water at 43 degrees for 48 hours, then the seeds and wet sand are mixed at a ratio of 1:3 (humidity It is better to put sand into the hands, but there is no water drop out. Dry layering is not thorough, and it is easy to make the seed moldy when wet.), put it in a 3～5°C environment for about 30 days, and then process the low temperature stratification. Check the sand moisture once a week, properly mix the outer layer of the outer layer to the inner layer, and add the appropriate moisture. Avoid drying too wet. About 30% of seed cracks can be sowed.
3, using the natural stratification for autumn sowing, the seeds sown in late autumn from January to January before the emergence of the following spring.
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. . The seedlings can be planted at heights as high as 10 to 20 cm in height, and can be planted directly in the nursery or planted in nutrient pods or forest nursery trays. 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 seedling height can reach 0.6 to 1 meters in the year and can be planted in the second spring.
