The main crop of summer sown corn is mainly winter wheat. After wheat is harvested, it should be planted and planted in time to ensure the normal maturation of summer corn, and create conditions for high quality and high yield of summer corn.
First, seed treatment. Selection of fine varieties: grain and feed use Nongda 108, Nongda 86, Nongda 95, etc.; grain corn with Zhengdan 958, Jingshao 13, Dandan 26, etc.; Silage corn with special crops 4, Keqing 1, North silage 1 Wait. Seed screening grading using the first and second seed, sowing before drying, coating or dressing treatment.
Second, the former treatment and soil preparation fertilization. Before the stalks of glutinous wheat were crushed, they should be sprinkled evenly, without crowding, and the height of squat should not exceed 25 cm. When sowing must be sufficient, the soil moisture content should not be less than 16%. Summer sowing of corn is generally used for sowing. When sowing, it is randomly applied for 15 kg/mu of corn.
Third, sowing. The seeding rate should be determined according to the size of corn seed, field germination rate and variety characteristics requirements. The density of silage corn compact seedling density is 4500-4800, flatness type is 4300-4500. Seed corn compact 4000-4500: flat 3500-4000 strains. Sow deep sandy land 5-6 cm, soil 3-5 cm.
Fourth, chemical weeding and management in the later period. A clear grass block can be used before sowing 10% glyphosate 1000 ml water 60 kg or 20% paraquat water 200 g water 10 kg. After sowing, 40% Atrazine emulsion 75 g plus 85% acetochlor EC 50 kg water 40 kg can be used for soil treatment. Corn growth into the big bell-mouth period attention to control large, small spot, brown spot, sheath blight, corn in the middle and late growth period, with Trichogramma and phoxim granules to prevent corn borer and armyworm. In the big bell mouth period combined with 25 acres of urea 25-30 kg.
Fifth, harvest in due course. Silage corn is harvested 20-30 days after silking, and the yield is of high quality; seed corn is harvested when the ear is fully ripe and does not die.
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