(1) Deep tillage and land preparation
Planting corn should be ploughed once every 2-3 years to a depth of 25-30 cm. At the same time, the soil is finely ground to achieve fine soil and no waste.
(2) Choosing the right variety
Choose high-yield and dense-tolerant varieties.
(3) Seeding technology
1. Selected seed and seed treatment
(1) Selected seeds: According to the size of the seeds, the seeds are selected according to the size of the seeds, so that the seeds are sown in the ground, the large and small plants are solved, and the three types of seedlings are eliminated.
(2) Sun-breeding: Before planting, choose a sunny and warm weather for 2-3 days.
(3) Seed coating: coating was carried out 2-3 days before sowing.
Seed coating should do the following: 1 The drug should be mixed evenly. 2 backlight operation. 3 sown after drying.
2, choose the appropriate sowing time
The accumulated temperature is about 2750 °C, the variety within the growth period of 128 days, the sowing period is from April 25 to May 5. For the varieties with accumulated temperature above 2800 °C and growth period of 128 days or more, the sowing date is from April 20 to May 1. The specific sowing time should also be adjusted according to the different conditions of the year.
3, do everything possible to improve the quality of sowing
(1) Suitable for planting: The soil texture is sticky, the lyrical soil can be 3-4 cm, the soil texture is loose, and the sandy loam is easy to dry. It can be planted 4-6 cm.
(2) The seed distribution should be uniform and the soil should be evenly distributed.
(3) Properly suppressed: heavy dryness of soil dryness, light repression of wetness.
(4) Reasonable close planting
In the medium and above fertile plots in our district, planting dense-tolerant varieties, we must create high-yield plants, planting 6.5-70 million plants per hectare, and stabilizing the production of 5.5-6 million plants per hectare.
(5) Adding organic fertilizer and formulating fertilizer
Under the premise of applying 30-45 cubic meters of high-quality agricultural fertilizer per hectare of 45-60 kg of zinc sulfate. In order to achieve a production of more than 10,000 kg, 220 kg of pure nitrogen, 65 kg of pure phosphorus and 90 kg of pure potassium must be guaranteed; the output should reach 220 kg of pure nitrogen of 220 kg or more, 65 kg of pure phosphorus and 100-120 kg of pure potassium; the output should reach 15,000 kg. The above pure nitrogen is 300-320 kg, pure phosphorus is 90-100 kg, and pure potassium is 130-150 kg.
(6) Strengthening field management
1. Chemical weeding
After sowing, weeding should be selected within 7 days after sowing. The weeding should be carried out before the leaves of 6 leaves and before the leaves of weeds. Pre-emergence weeding after sowing must be applied when the soil is moist and the temperature is greater than 15 degrees. The dosage should generally not exceed 15-20% of the maximum amount in the instructions. Otherwise it is prone to phytotoxicity.
2, hit the scorpion: the scorpion that grew in the previous period, must be destroyed when a pair of scorpions appear, the scorpion that appears in the future can be ignored, basically does not affect the output.
3, the big trumpet period topdressing.
4. Chemical regulation
In the production, chemical control treatment is used to prevent corn from lodging. Chemical control should pay attention to the following points:
(1) Chemical control can only be carried out under the conditions of fertile soil, high planting density, fertilization, shallow fertilization, abundant rain, and emergence of young seedlings.
(2) Never use excess or super concentration, otherwise it will reduce production.
(3) Use at the specified time, not too early or too late.
5. Pest control
(1) Corn smut: coated with a tebuconazole-containing seed coating.
(2) Corn size spot disease: effective control can be achieved by using the agent for controlling rice blast.
(3) Golden worm, ground tiger, and heartworm: seed dressing with 7% content of carbofuran; in the early stage, 50% phoxim emulsifiable concentrate was used to irrigate the roots.
(4) Myxos: In the early stage of larvae, it is controlled by chemical agents such as phoxim, rifampicin and enemy killing.
(5) Corn borer: Controlled with Trichogramma.
(6) Aphids: Controlled with 50% anti-procarb or 1O% than insecticide.
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