The key cultivation technology for super-high yield of summer corn is based on super high-yielding corn varieties, and aims at super high-yield technology for the construction of high-yield corn and the establishment of high-yield corn in our province. The establishment of key technologies for the integration of super high-yield cultivation techniques was proposed.
1. Selected fine varieties. (1) The selected varieties require compact planting, dense planting, lodging resistance, density of 5000 plants/mu or less, no emptying, no baldness, and an average grain weight per spike of 200 g or more. The fertility period is about 125 days in spring and 105 days in summer. (2) Seed treatment. Pick out the broken, moldy and damaged grains and pods, use the same size seeds, soak them for 8 hours, dry them with 40% methyl ethyl thione and 2% rick show, and apply seed 0.2% to prevent rough shrinkage. Disease, seedling blight, smut, and underground pests.
2. Fine sowing. (1) Fine soil preparation. Before planting finely ploughed land preparation, Mushi quality chicken manure 3 cubic meters, phosphorus pentoxide 10 kilograms, potassium oxide 30 kilograms, zinc fertilizer 1 kilogram, 5% phoxim granules 1.5 kilograms. (2) planting enough seeds. Sowing from June 5th to 15th, planting in large and small rows, 80 to 90 cm in large row spacing, 30 to 40 cm in row spacing, 3 to 4 kg of seeds for seeding in mu, and 5 kg of compound fertilizer in Mushi as seed fertilizer. Fertilizer isolation, uniform depth of soil, thickness of 3 cm.
3. Increase density. Planting density 6000-7000 per acre, and time seedlings, Dingmiao. Ensure that the number of harvested plants at the time of harvest is more than 5,500 per mu.
4. Full amount of fertilization. Generally, nitrogen (N) 3 kg, phosphorus (P2O5) 1 kg, and potassium (K2O) 3 kg are used for every 100 kg of grain produced; phosphorus and potassium are used as base fertilizers; nitrogen fertilizer is applied lightly, panicle fertilizer is heavy, and grain fertilizer is applied .
5. Fine management. (1) Watering in time. It is necessary to irrigate when drought occurs during emergence from the small bellmouth. After the big bell mouth period, we must reach the surface to see wet and dry. (2) cultivating loose soil. From post-emergence to small bellmouth, cultivating usually 2 or 3 times to keep the soil loose. (3) Prevention of pests and weeds. Weed control: Before emergence, soaked on the ground with 50% acetochlor EC 100 to 120 ml watered 30 to 50 kg. Prevention and treatment of dwarf diseases: The seedling stage is used to control SBPH. Second and third generations of armyworm and thrips: 1000 times with 50% phoxim and 2000 times with dichlorvos emulsion spray control, prevention and treatment time in the seedling stage and the ear period, both corn borer and rare snow moth. Corn borer: Use 3% phoxim granules, 250 grams per mu, add 5 kg of fine sand, and sprinkle the heart leaves in the small bell mouth of corn. Corn borer: Control 100% of monocrotophos 100 times solution on the stems of the maize ear. (4) Artificial detasseling. Pull out one-half of the whole tassel (interlaced or septum) at the time of the taito, and remove all remaining tassels after pollination is completed. (5) Artificially assisted pollination. Pollination was checked on a plant-by-plant basis at the late stage of pollination, and artificially assisted pollination was performed on unfertilized fresh filaments to increase the number of grains per spike. (6) Remove empty strains. Empty straw plants were removed 10 days after pollination.
6. Finished harvesting. The criteria for harvesting were: black layers at the base of the corn kernels and completely disappeared dairy lines.
7. Appropriate to promote the region. Huang Huai Hai summer corn area.
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