First, prepare before broadcast
1. The soil is loosened when the soil is turned to the ground during the suitable tillage period and the soil is ploughed. From the beginning, the bottom is 1.33 meters wide, 1.17 meters wide, and digs drains around the field.
2. The seeds are prepared for sowing in the sun for 2 days before sowing. Sweet corn seeds do not need to be soaked, and they should be used for direct seeding. High germination rate, improper soaking and germination conditions, or improper methods will cause the germination rate to drop rapidly.
3. Prevention of underground pests and rodent damage Sweet corn seeds are vulnerable to underground pests and rodents, and can be used as a seed for seed dressing with a broad-spectrum insecticide 3% furacarb granules (adding a small amount of water to make insecticides attached to seeds). The strange smell can prevent the underground pests and rodents from eating the seeds. If the underground pests are very serious, they can be sprayed with fernium granules in the fertilization ditch before sowing. The amount of mu should be 4.6 kilograms.
4. Density determination Two rows of plants are planted on the planting surface with a row spacing of 66cm. It is suitable for local conditions. 3200 acres of high-fertilized acres are planted with a spacing of 32cm, 2800 acres of medium-fertilized acres are planted with a spacing of 39cm and 2000 acres of low-fertilized acres are planted at a spacing of 50cm. .
Second, sowing technology
1. Applying basal fertilizer and seed fertilizer to re-supply basic fertilizer and applying sufficient seed fertilizer are key measures for high-yield sweet corn, and they are indispensable. Phosphorus fertilizer can only be used as base fertilizer and seed fertilizer, not suitable for top dressing. Organic fertilizers have large absorption capacity and strong fertility, which can prevent the fixation of phosphate fertilizers in the soil and prevent the loss of nutrients. In the life of sweet corn, organic fertilizers like a fertilizer store can continuously provide fertilizer and fertilizer. Fertilizers topdressed in the topsoil are easily washed away by rain, and re-application of base fertilizers can reduce the number of top dressings. Basal fertilizer is 1000 kg per mu for farmyards, plus appropriate amount of water rot to heat up and decompose. Before sowing, open two fertilizing and sowing channels in the surface of the plant. The distance between the grooves is 66cm and the depth is 15-16cm. The organic fertilizer is applied to the ditch, and compound fertilizer (40 kg/mu) is applied on top of the organic fertilizer, and calcium superphosphate (18% of phosphorus pentoxide, 25 kg/mu) is used as a base fertilizer for root absorption. Reconstituted soil 6cm, and then apply fertilizer by plant spacing, apply compound fertilizer (15% nitrogen, phosphorus, potassium) as a seed fertilizer per acre, and then reconstitute soil 4? 5cm, so that the seed fertilizer is applied to the seed 4? At 5cm, it is the location of the primary root. Fertilizers applied to the top of the seed cannot be absorbed by the primary roots, but only absorbed after the roots grow. Fertilizer must use nitrogen, phosphorus, potassium complete fertilizer.
2, sowing soil moisture up to 60? 70% of the field capacity for sowing is suitable for sowing. In fertilizing and seeding trenches where the fertilizer has been applied, step on the soil and create a flat and tight seedbed. Sowing 3 dry seeds mixed with the insecticide furicarb to the flat bed. Disperse three seeds in the same plane. When the top of the seed is 3~4cm in diameter, when the soil temperature is low or there is too much water, the reconstituted soil should be shallow (2.5?3 cm is appropriate). It must be done in the same depth and in the same soil, in order to have 1 seedling, seedlings and seedlings. Do not repress after sowing.
3. The herbicide must be sprayed on the day after spraying the herbicide to sow the soil, and the weeding effect is poor after spraying. Available 50% acetochlor emulsion 50 grams per acre in a large bucket of water 100 kg. Use a sprayer to lower the nozzle evenly on the ground surface. Spray on the surface and the groove surface. When the soil moisture is suitable, the effect is good. The surface forms a film and can kill the new grass buds. 40% Atrazine emulsion can also be sprayed after sowing of soil, 300 grams per acre and 100 kg watered.
Third, field management
1, 3 leaf stage and early seedlings, leaving 2 plants per hole.
2, 5 leaves in a timely manner Dingmiao, leaving a plant per hole, shallow cultivation of loose soil, and then topdressing, urea 10 kg per mu, small earth. Sweet corn seedlings are more tolerant to drought, suitable soil moisture is 60% to 70% of the field water holding capacity, and they are most afraid of damage during seedling stage. Waterlogging can kill seedlings overnight and should be promptly drained. Fertilizer enough to accelerate the speed of leaf differentiation, increase the total number of leaves, increase leaf area and promote the development of tassels. The root system of sweet corn needs a large amount of oxygen, which requires good soil porosity and ventilation. In the seedling stage, timely cultivating loose soil and small cultivating soil are important measures to promote the deepening of the root system, which cannot be omitted. If the cultivating soil is not ploughed and the soil moisture is too high, the root system will extend upward and cause a decrease in production.
3, big bell mouth period (booting phase), should be timely cultivator loose soil, and then topdressing, urea 20 kg per mu, potassium chloride 15 kg, earth. If necessary, the herbicide atrazine can be sprayed after killing the soil to kill new sprouts. Potash fertilizer can resist lodging, disease resistance, strong stalks, and promote the transport of nutrients to the grain. At this stage, the water requirement is more than the seedling stage. The suitable soil moisture content is 70-80% of the field water capacity, and the water should be promptly filled and drained.
4. Before tasselling, 20 kg of urea per mu, 7.5 kg of potassium chloride, large soil, can prevent lodging and pressure of grass.
The tasseling and flowering period is a sensitive period for sweet corn and requires that the soil water content be 80% of the field water holding capacity. It is the period with the most water requirement during the entire growth period. “Drought flowering time, cut production by halfâ€, and even the male flower can not be pumped out. Sufficient water in the tasseling period is extremely important for high yields. After the pollination is completed, the tassels are removed and the tassel damage can be reduced. The removal of large grass in the later period can avoid nutrient contention, prevent the lower leaves from falling and reduce pests and diseases.
Fourth, timely harvest
The listed barley is the ear of sweet corn from the late maturity stage to the early waxing stage. The index of the best harvesting period is that the grain moisture content is 70%. At this time, the sweetness is high and the flavor is good. Harvested slag was too thick and the sweetness decreased. Harvest fresh fruit ear should be processed in time, it should not be placed at room temperature overnight, otherwise the sweetness declines, the flavor is poor. Fresh frozen ears can be stored in cold storage for a long time and can be supplied to the market for an anniversary.
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