Good three-way corn high yield
Transplanting
The transplanting period is suitable for the two-leaf one-heart period to the three-leaf one-heart period. At this time, the corn root is thick and short, and it is not easy to be damaged. The growth of good corn is easy to survive. The aging seedlings tend to appear late in the transplanting period, and the survival rate is low.
Reasonable close planting density depends on variety characteristics, soil fertility and climatic conditions. Carrying wide and narrow rows of transplanting, small row spacing of 50 cm, large row spacing of 80 cm, plant spacing of 24 cm, about 3,750 plants per mu.
When the directional transplanting and transplanting were carried out, the first true leaves of the corn were all outward and the leaves were perpendicular to the row direction, and the wrong nest was transplanted. After transplanting, the root water is poured once.
Daejeon Management
The management of large fields is mainly based on fertilizer and water. According to the characteristics of fertilizer required for different growth stages of corn, the techniques of early application of seedling fertilizer, medium attack and early grain supplementation are the key measures to increase corn grain yield.
The seedling fertilizer is topdressed after transplanting the seedlings, and the urea is used for 5~6 kg of urea, and the 1500 kg of manure water is used for drenching, combined with cultivating loose soil and weeding.
The panicle fertilizer is the big trumpet period, and the fertilizer is applied again. 15 to 25 kilograms of urea per mu, and 1000 to 1500 kilograms of decomposed manure or compound fertilizer of 15 to 25 kilograms can be added in qualified areas. Digging the nest between the corn plants and combining the soil, the depth of application is about 10 cm of topsoil. Fertilization time is 11~12 leaves in the whole leaf.
In the silking stage: if the leaf color fades, 5 kg of urea can be replenished per acre, and the root of the plant can be applied to the root of the plant, or 100-150 grams of potassium dihydrogen phosphate, plus 0.5 kg of urea and 25 kg of water.
Pest control
Size spot disease corn before tassel use 50% carbendazim WP 500 times solution, or 50% bacteriostatic WP 800 times solution, or 75% chlorothalonil WP 500-800 times solution, Spray 1 or 2 times and spray once every 15 days.
In the early stage of sheath blight, use 5% Jinggangmycin 1000~1500 times solution or 25% sclerotia net 800~1000 times solution, or 50% thiophanate, carbendazim, detoxification 800~1000 times solution, or 65% The wettable sensible zinc 500 times solution is sprayed on the affected part 1 or 2 times.
The ground tiger was sprayed with 5% phoxim 1000 times.
At the end of the corn leaf, the corn borer is 1.5% zinc sulphide granules and placed directly in the bell mouth.
In the corn seedling stage, 5% of the plants showed dead seedlings and field hatching, using 90% trichlorfon or 50% chlorpyrifos or 25% chlorpyrifos, or 50% bataan emulsion and enemy killing 800~ 1000 times liquid spray seedlings.
The armyworm and the aphid are sprayed with 10% hero or imidacloprid wettable powder 1000 times.
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