Planting methods: 1. Soaking seeds, sowing seeds are generally picked up in the first half of the month before planting, and the red maple seeds are soaked in warm water for 12 hours. 2, sand, the United States red maple seeds after repeated tests without low temperature sand, choose a thicker gas permeability good river sand, sand and seeds according to the body: 3:1 ratio of mixing, sand humidity is --- hand The group is loose and scattered. After mixing, the mixture of seeds and sand can be placed indoors. Sand for about a month, often check, found that there are germinating seeds, to be planted in time 3, seedbed preparation before sowing: deep plowing surface soil broken, ridge width 1.5 meters deep trench. 4, sowing: the general situation 15-20 days of the United States red maple seeds began to germination, until the germination reached 20% can be all sowed (can also pick out the already germinated seeds), per acre planted US red maple seeds 3 kg, already The small ridge on the whole ridge is 10cm wide and 20cm deep, and the seeds are spread together with the sand to the small groove of the open, and the seeding should be uniform. (Control the total amount) 5, cover soil, support small arch shed: after sowing should be covered with a layer of moist fine soil, cover soil can not be too thick generally 0.5-1cm, cover soil too thick to affect budding. Support plastic small shed, plastic small shed on the sunscreen net arch shed, pay attention to the plastic arch shed under, sunscreen net arch shed on the upper, the distance between the two arch shed should be greater than 20cm, in order to maintain the effect of ventilation cooling. 6. Routine maintenance: Within 1 month after sowing, it is a key period for the red maple sprouting in the United States. It is often observed to keep the temperature and humidity in the arch shed. It is easy to express the temperature when the hand is deep into the film arch shed. It should be ventilated immediately if the temperature is too high. And use a method of spraying at both ends of the film arch shed to cool down. When the seedling grows to 5-10cm, the film arch shed is removed. The sunscreen net arch shed will continue to be preserved. After the seedlings grow to 20-30cm, the sunscreen will be opened in the morning and evening, and the sunscreen will be covered at noon. The sunscreen will be removed after 2 weeks. 7, water fertilizer, weeding: After the seedling grows to 10cm, you can use foliar fertilizer, or a small amount of urea, remember that fertilization should follow a small number of methods, not excessive, to prevent burning. At present, there is no effective herbicide that does not harm the American red maple seedlings, so the method of artificial weeding is generally adopted.