Spring sweet corn planting technology

1, choose a good seed. Sweet Corn varieties include Super Sweet No. 3, Super Sweet 204, and Dongtang 206. These varieties have high yields, medium growth periods, fresh grain sugar content of more than 16%, and fresh food tastes good.

2, timely sowing, nurturing strong seedlings. Generally from the 15th to the 20th of March onwards sowing, nylon film must be used to cover the nursery. Select a sandy soil plot with loose soil, good fertility, and sunshine as a seedbed. After fine soil preparation, apply a thin layer of manure fertilizer and arrange corn seeds according to the grain spacing of 3 to 5 cm to slightly suppress the seed. Then cover it with fine mud, about a centimeter thick. Then cover the film insulation. The seedling age is about 20 days. The leaf age is 2 leaves from one heart to 3 leaves, preventing overage transplanting and reducing yield.

3, improve the quality of soil preparation and transplanting to ensure that the seedlings are even and uniform. Before the ploughing, 25 to 30 kg of ammonium bicarbonate was applied per acre, and 25 kg of superphosphate was used as a base fertilizer. After plowing, soil preparation was performed, and the width was 1, 2 m. The soil with heavier soil viscosity can be filled with fertilizer at one time, that is, the ditch in the center of the sorghum is applied, and 75 kg of ammonium bicarbonate, 25 kg of superphosphate, and 15 kg of potassium chloride are applied per mu. After covering the soil, apply 80% acetochlor in an appropriate amount or evenly spray water on the surface to prevent weeds.

Then cover with plastic film. However, in the case of sand-heavy leakage fields, fertilizers should not be applied at one time, and fertilization should be applied according to the principle of “appropriate application of Miaofei and heavy panicle fertilizer”. After planting corn seedlings, use 50% phoxim or 40% chlorpyrifos 1000 times water to prevent underground pests. The transplanting density was 3300-3500 mu and the plant spacing was about 33 cm. After transplanting to survive (about 7 to 10 days after planting), Miaofei should be applied in a timely manner. Generally, it is possible to use thin faecal water or 10 kg of ammonium sulfate per acre.

4, strengthen management. Sweet corn varieties have multiple spikes and they should be removed in time, leaving one strong ear per plant. During the trumpet, 600 tons of BT emulsion (Bacillus thuringiensis) or 500 times of 18% of insecticidal doubles, or 1000 times of 90% crystal trichlorfon was used to irrigate the corn borer. Highly toxic and high residue pesticides are strictly prohibited. The use of any pesticide should be stopped 15 days before harvest.

5. Isolate from ordinary corn. Sweet corn and common corn should be isolated and planted, requiring a gap of 300 meters or more to prevent string flowers from affecting the quality of corn. Fresh sweet corn can be sowed in batches to supply the market continuously, avoid large quantities of one-time maturation, and result in loss due to excessive success.