1. Make the border at the right time: build the scaffolding from late October to early November, dig the ditch for the shed film, and buckle the shed film to bake the ground for 20-30 days in mid-to-late February. One acre of land requires a seedling pool of 12-15 square meters, and a middle arch shed is built with a width of 5-6 meters. The seedling border should be built in a place with easy drainage and irrigation, facing away from the wind and facing the sun, and where no solanaceous crops have been planted in the past 3 years. Use disease-free, fertile soil as bed soil, and apply 0.25 kg of potassium dihydrogen phosphate and 0.5 kg of compound fertilizer per 10 square meters. \x0d\\x0d\ 2. Germination and sowing: sun-dry the seeds for 2-3 days before raising seedlings, then store them in a ventilated place, scald the seeds with 50-55℃ water for 15-20 minutes before sowing, and then soak the seeds with 20-30℃ water. 12-24 hours, wrap the seeds with gauze and place them at 28-30°C for 75 hours to germinate. When the buds show their tips, they can be sown. Sowing can be done when the soil temperature reaches above 8°C in mid-to-late March. Use a watering can to water before sowing. After the water has dried, spread the germinated seeds evenly in the border. Sow 100-120 grams of seeds per 10 square meters of seedbed, cover with 8-10 mm of fine soil with a sieve, and then water thoroughly. Use 800-1000 times carbendazim aqueous solution, cover with white mulch after the water seeps out. \x0d\\x0d\ 3. Seedbed management: Pay attention to heat preservation and cold protection in the early stage. Cover the feet with straw curtains at night to keep warm, or buckle a small arch in the shed, and hang 1-meter-high double films around the feet for heat preservation. In the later period, when the temperature is high, the air can be released in time during the day. . When the seedlings are weak, the seedbed can be irrigated with yield-increasing water. Seedlings were planted twice during the 2-leaf 1-heart stage and 4-leaf 1-heart stage, leaving one plant every 3.3 square centimeters, and combined with thinning to remove weeds. 10-15 days before transplanting, remove the film and let the seedlings air out for hardening. Water the seedlings once or twice a day before they emerge. It can be transplanted when the plant is 15-20 cm tall and has 8-10 leaves. \x0d\\x0d\ 4. Seedling planting technology: Prepare the soil and apply fertilizer before planting. Transplanting from May 15th to 20th. The density of transplanting should be sparse for large trees in fertile land, and densely for small trees in thin land. Two plants per hole, hole spacing 25 cm, 6,000 holes per mu, and 12,000 seedlings preserved. When transplanting, use an eye punch or wooden stick to drill holes along the membrane according to the row spacing between plants. After watering, plant the seedlings and seal the membrane holes tightly with soil to prevent air leakage and moisture loss. The investment per mu increased by mulching film is 60-80 yuan, and the yield is increased by more than 30 yuan compared with conventional cultivation. Film-covered fields should be stubble land, not fields where atrazine herbicide has been used in the previous crop. Apply enough base fertilizer, make a 80-85 cm wide sorghum border, and cover it with 90-100 cm wide mulch (preferably with Black mulch), cover with mulch and then transplant. \x0d\\x0d\ 5. Field management: Check the mulch film frequently after planting. If it is found to be damaged or blown up by the wind, cover it with soil and seal it tightly in time. After slowing down the seedlings, pick and top them in time, and master the topping principles of not topping when thin and fattening, not topping when there is waterlogging and drought, and not topping when high and low. Pull out weeds in the eyes of seedlings and in the furrows, and apply fertilizer and water in a timely manner. After the main stem buds and the side branches bloom, quick-acting fertilizer should be applied once, water should be poured twice to increase production, and disease and insect pest control should be done well. Harvest 1-2 days before frost.