Planting techniques of fresh Sweet Corn in Spring

To select improved varieties, you can choose sweet corn super sweet 3 and super sweet 204, which were popularized and planted last year, as well as trial planting and demonstration of new varieties such as Dongtian 206. These varieties have high yield, medium growth period, more than 16% sugar content in fresh seeds and good taste in fresh food. Sowing at the right time, the cultivation of strong seedlings generally began to sow from March 15 to 20, nylon film must be used to cover the seedlings. Choose the sandy soil with loose soil, good fertility and plenty of sunshine as the seedbed, after fine soil preparation, apply thin human manure once, arrange the corn seeds at a distance of 3 to 5 cm, slightly suppress, and then cover the seeds with fine mud, about 1 cm thick, and then build a film to keep warm. The seedling age is about 20 days, and the leaf age is from two leaves to three leaves, which can prevent over-age transplanting and reduce the yield. Improve the quality of soil preparation and transplanting to ensure that 25 kg of ammonium bicarbonate and 25 kg of calcium phosphate are applied to the whole seedling and uniform seedling before ploughing. After ploughing, the land is prepared to make a bed with a width of 1.2 meters (even ditches) for two rows. The fields with heavy soil stickiness can apply sufficient fertilizer at one time, that is, 75 kg of ammonium bicarbonate, 25 kg of calcium superphosphate and 15 kg of potassium chloride can be applied in the middle of the border. 100 ml of Acetochlor is used to evenly spray the border surface with 80% Acetochlor per mu to control weeds and then cover with plastic film to wait for planting seedlings. However, in the leaky paddy field with heavy sand, fertilizer should not be applied at once, but should be fertilized according to the principle of "suitable application of seedling fertilizer and heavy application of base fertilizer". Planting corn seedlings, then watering with 1000 times of 50% phoxim or 40% chlorpyrifos to control underground pests, and then cover some soil to ensure survival. The transplanting density is 3300 to 3500 plants per mu, and the plant spacing is about 33 cm. After transplanting survived (about 7-10 days after transplanting), seedling fertilizer should be applied in time, generally 10 piculs of thin human manure or 10 kg of ammonium sulfate per mu. Strengthen the management of sweet corn varieties with multi-spike phenomenon, should be removed in time, each plant has a strong ear. In the trumpet stage, the corn borer was perfused with bt emulsion (Bacillus thuringiensis) 600x or 18% dipterex 500x or 1000 times of 90% crystal trichlorfon. The use of highly toxic and high residual pesticides is strictly prohibited. The use of any pesticides should be stopped 15 days before harvest. Sweet corn should be separated from ordinary corn at an interval of more than 300 meters to prevent flowers from affecting the quality of sweet corn. Fresh sweet corn can be sown in batches to continuously supply the market and avoid one-time mature quantity.