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one. The use of improved varieties Currently, the sweet corn varieties promoted in Henan are mainly Super Sweet No. 3 and Super Sweet 204, and new varieties such as Dongtian 206 can also be tested. These varieties have high yields, medium growth periods, fresh grain sugar content of more than 16%, and fresh food tastes good.
two. Timely sowing and cultivation of strong seedlings generally starts from around March 15-20, and nylon film must be used to cover seedlings. Choose soil with loose soil, good fertility, and sunny sandy land as seedbed. After fine soil preparation, apply thin manure fertilizer once more, arrange maize seeds at a grain spacing of 3-5 cm, slightly suppress and cover with fine mud. , about 1 cm thick, and then cover the film insulation. The seedling age is about 20 days, and the leaf age is 2 leaves from one heart to three leaves as one heart to prevent overage transplanting and reduce yield.
three. Improve the quality of soil preparation and transplanting to ensure that 25-30 kilograms of ammonium bicarbonate and 25 kilograms of calcium phosphate are applied before transplanting tillage. After the ploughing, the soil preparation works, and two rows of 1.2 meters wide (even ditch) are planted. The soil with heavier soil can be filled with fertilizer at one time. That is, 75 kg of ammonium bicarbonate, 25 kg of superphosphate, 15 kg of potassium chloride, and 80% of grass in the mu after covering the soil in the middle of the ravine. 100 ml of amine water was evenly sprayed on the surface to prevent weeds, and then covered with plastic film to be planted. However, in the case of heavy sand leakage, fertiliser should not be applied at one time. Fertilizer should be applied according to the principles of “appropriate application of seedling fertilizer and heavy application of fertilizersâ€. Corn seedlings were planted, then watered with 50% phoxim or 40% chlorpyrifos 1000 times to control the underground pests, and then cover the ground to ensure survival. The transplanting density was 3300-3500 strains, and the spacing was about 33 cm. After transplanting and surviving (about 7-10 days after planting), Miaofei should be applied in a timely manner. Generally, 10 mu of ammonium sulfate or 10 kg of ammonium sulfate can be used in the mu.
four. To strengthen the management of sweet corn varieties with multiple spikes, they should be removed in time, leaving one strong ear per plant. In the horn period, the corn borer was treated with 600 times of bt emulsion (Bacillus thuringiensis) or 500% of 18% of insecticidal doubles or 1000 times of 90% crystals of trichlorfon. It is forbidden to use highly toxic and high residue pesticides. The use of any pesticide should be stopped 15 days before harvest.
Fives. Sweet corn should be spaced more than 300 meters apart from normal corn to prevent string flowers from affecting the quality of sweet corn. Fresh sweet corn can be sowed in batches to continuously supply the market, avoiding too large amounts of one-time ripening and causing losses.
Fresh corn sweet corn planting technology in spring
We all like to eat fresh sweet corn, the market capacity is large, high yield, good efficiency, from sowing to fresh harvest about 90 days, does not affect the hybrid rice cultivation, is the production of 1000 kg per mu grain, grain type planting Good mode. To summarize the practice of cultivation in recent years and planting good sweet corn in spring, we should grasp the following: