First, prepared for the preparation of species 1, plastic plate: Select 6033cm, 254 holes (or 100 holes) of plastic floppy disk 15-18 (30-40) per acre. 2. Seeds: Hybrid varieties such as Eyu No. 10, Huayu No. 4 and Eyu 13 were used, and 1.5 kg per mu was prepared. Second, build a bed to prepare soil 1, build a bed: choose the fertile soil, leeward sunny, easy to manage the dry soil loam soil seedbed, bed width 130cm, bed formation, bed length according to the corn planting area and density may be, build 300cm per acre bed About 250 to 300cm of intercropping corn and flat variety, and 300 to 350cm of net seed and compact variety. The seedbed is left 5cm wide on all four sides, and the earth is flush with the car's surface to facilitate heat preservation. 2, prepare soil: nutrient soil selected quality rotted farmyard fertilizer 20 kg, fine soil 60 kg, mixed and spare. Third, seed treatment 1, drying seeds: sowing seeds before sowing 1-2 days, sterilization, increase the germination rate. 2. Seed selection: Select full, uniform and uniform seeds, remove pests and grains, damaged grains and granules, and seed dressing. Fourth, fine sowing 1, swing plate: first with diluted fecal water to soak the bottom of the seedlings, flat wobble plate, leaving no gap between the disk, and then use the board to compact the floppy disk, so that the bed and bed soil close. 2. Seeding: Select the suitable sowing date, sowing the seeds according to the seed size, sowing one seed per hole. 3, cover soil: cover the seeds with fine fertilizer, fill the holes, flatten the soil with a wooden board, sweep the surface of the floating soil, so that the nutrition between the holes is not linked, then use a watering can or sprayer to the soil in the floppy hole Permeate water and avoid using pouring water. 4, cover film: bamboo shoots in the seedbed with arches, with a 200cm wide agricultural film or mulch film, film sealed with soil tightly compacted. V. Seedbed management 1. Temperature: sowing to Qimiao for sealing and warming period, Qi Miao ventilation after hardening seedlings, sunny morning, the two sides of the seedbed edge of the film edge ventilation and cooling, cover insulation in the evening. 3-5 days before transplanting, the film is removed and cultivated during the day to cultivate short-sturdy seedlings. 2. Moisture: sowing until the emergence stage, so that the bed soil to keep moist, if the water surface of the nutritious soil is white, you can even spray enough moisture, water spray should be before 10 o'clock in the morning or after 4 o'clock in the afternoon. Sixth, the appropriate period of transplanting 1, site preparation: transplant field Daejeon deep plowing soil in winter, open spring fine plowing, remove the former crop residues (stems), waste film and stones. 2. Fertilization: Fertilizing in open pits, applying 2500-3000 kg of farmyard fertilizer per acre, 50 kg of 25% compound fertilizer and 1.5 kg of zinc fertilizer. 3, for ridge: ridge in advance, ridge height 10cm, ridge width 40cm. Plastic film cover cultivation, to do enough to cover the plastic film. 4, transplanting: Seedlings 2-3 days to check the seedlings, seedlings found missing in time to make up. VII. Daejeon Management 1. Check the seedlings to make up the seedlings: Check the seedlings 2-3 days after transplanting, and find that the seedlings are planted in time. 2. Intertillage and weed control: Field corn has no weeds in its fields during the entire breeding period, and the plots must be harvested in due course to reduce the shade of corn. 3, rational fertilization: corn seedlings 6-7 leaves, as early as the application of Miao Fei, to promote balanced growth, 2.5 kg of urea applied per 1000; large bell-mouth re-appropriation of panicle fertilizer, urea 5 kg per 1000 strains Silking period see seedling Shi Zhuang seed fertilizer, applying 1 kg of urea per 1,000 strains. Plant holes or deep ditch fertilizers between plants to increase fertilizer use efficiency. 4. Control pests and diseases: control corn borer at big bell mouth stage, use carbofuran or insecticidal double granules per acre and throw it into the heart leaves, apply 3-4 grains per plant; pay attention to control sheath blight after pulling tassels. In case of diseased plants, the old sick leaves of the base were promptly removed, and spraying of iversonomycin or lime water was used to control the spread of the disease; the diseased plants were removed from the head smut, and were taken to the field for destruction.