Planting techniques of Sweet Corn in Spring

Fresh sweet corn everyone likes to eat, the market capacity is large, the yield is high, the benefit is good, from sowing to fresh ear harvest about 90 days, does not affect the hybrid rice planting, is a grain per mu, thousand yuan money good planting mode. Summing up cultivation practice in recent years, planting sweet corn in spring, we should pay attention to the following: 1. At present, the sweet corn varieties popularized and planted in Henan mainly include Super Sweet 3 and Super Sweet 204, and new varieties such as Dongtian 206 can also be tested and demonstrated. These varieties have high yield, medium growth period, fresh grain sugar content of more than 16%, fresh taste good. II. Timely sowing, cultivation seedlings generally from March 15 - 20 or so began sowing, must be covered with nylon film frame seedlings. Choose loose soil, good fertility, sufficient sunshine sandy loam plot as seedbed, fine soil preparation, apply thin human manure, arrange corn seeds according to 3-5 cm grain spacing, slightly suppress, cover seeds with fine mud, about 1 cm thick, and then erect a film to keep warm. The seedling age is about 20 days, and the leaf age is 2 leaves and one heart to 3 leaves and one heart, so as to prevent overage transplanting and reduce yield. III. Improve the quality of soil preparation and transplanting, ensure that 25- 30kg ammonium bicarbonate and 25kg calcium phosphate base fertilizer are applied to each mu before tillage of whole seedlings and uniform seedlings. After ploughing, soil preparation for the ridge, ridge width 1.2 meters (even ditch) planted two rows. For fields with heavy soil viscosity, sufficient fertilizer can be applied at one time, that is, 75kg ammonium bicarbonate, 25kg calcium superphosphate and 15kg potassium chloride are applied in the middle of the ridge surface. After covering the soil, 80% acetochlor 100ml water is evenly sprayed on the ridge surface to control weeds, and then covered with plastic film for planting seedlings. However, for the leaky fields with heavy sand, fertilizer should not be applied at one time, but should be applied according to the principle of proper seedling fertilizer and heavy cattail fertilizer. Planting corn seedlings, watering with 50% phoxim or 40% chlorpyrifos 1000 times solution to control underground pests, covering the ground to ensure survival, transplanting density of 3300-3500 plants, plant spacing of about 33 cm. After transplanting survival (about 7-10 days after planting), seedling fertilizer should be applied in time. Generally, 10 kg of thin material or 10 kg of ammonium sulfate can be used per mu. IV. To strengthen the management of sweet corn varieties have multi-ear phenomenon, should be removed in time, each plant leaves a strong ear. At trumpet stage, bt emulsion (bacillus thuringiensis) 600 times or 18% dimehypo 500 times or 90% trichlorfon crystal 1000 times was used to control corn borer. It is strictly prohibited to use highly toxic and highly residual pesticides. All pesticides should be discontinued 15 days before harvest. v. Sweet corn should be isolated from ordinary corn planting requirements at an interval of more than 300 meters to prevent cross-flowering affecting the quality of sweet corn. Fresh sweet corn can be sown in batches to continuously supply the market and avoid too much one-time maturity and loss.