Corn film-mulching seedlings can achieve early planting and early corn planting in our city, so that corn can be lifted before the peak of plum rain, grouting mature before high temperature and drought, avoiding or reducing unfavorable climate hazards, and fighting for high yield of corn. It is an important measure for disaster relief.
First, suitable area. Suitable for application in Chongqing City.
Second, seedbed selection. It is required that the nursery beds be flat, leeward, well-drained open spaces or farmhouse dams, and the loose land should be compacted.
Third, the preparation of nutritious soil. 15 days before planting, sufficient loose and fertile loam heterotrophic fertilizer (70% of manure and 30% of soil miscellaneous fertilizer), 850 to 1100 kilograms of loam heterotrophic fertilizer per hectare, 5 to 10 kilograms of superphosphate, 10 kilograms of plant ash, and appropriate amount The manure water is mixed and hand-kneaded into groups.
Fourth, make fat balls. The nutrient-rich soil ball forming machine is made into a cylindrical fertilizer ball, and each fertilizer ball weighs about 200 grams.
Fifth, seed cover film. The seeds that were germinated to the powder mouth were put into the sowing holes of the fertilizer balls, and one seed was selected for each ball sowing. After sowing, the fat balls will be placed close to each other. Fill the gap between the fertilizer balls with fine soil, and cover the soil with 2 cm. Then spray a proper amount of water to cover the membrane.
Six, seedbed management. The key is to maintain proper temperature, moisture, and air. The temperature inside the seedbed membrane is generally 3°C higher than that outside the membrane. If the temperature is too high, the seedling will be burned. When the temperature in the film reaches 35°C, the film must be removed and cooled. Keep seedbed moisture, and the soil of fertilizer ball is not white. If dry and water shortage is found, remove the film and water.
Seven, timely hardening seedlings. When the seedlings begin to grow, the seedlings begin to grow. In the sunny days, the two seedlings of the seedlings are opened to cool the seedlings, and the seedlings are returned to the mulch at 4-5 pm. After 3 days, the plastic film was completely peeled off at noon, and it was still covered in the afternoon. After another 2-3 days, the plastic film was peeled off and allowed to grow naturally.
Eight, reasonable dense planting. The seedlings were transplanted in the shade of 2.5-3 and transplanted in sunny weather to avoid cold weather so as not to delay greening. According to the characteristics of the selected varieties, the general compact and semi-compact varieties are planted with 3200-3600 plants, and the flat-type varieties are planted with 2800-3000 plants.
Nine, field management. The fertilization technique will be used to understand the principles of replanting base fertilizers, applying jointing fertilizers, and reapplying panicle fertilizers (for details, refer to the Summary Table of Recommended Soil Fertilization and Fertilizer Recommendations for the Main Grain Crops in Chongqing). Pest control requires the use of highly effective, low-toxic, low-residue pesticides. Using 75% of zinc-phosphorus 100 grams of mixed soil 25-30 kg applied to the base of seedlings to control the damage of the silkworm (Tiger mairei). Aphids are controlled with "Imidacloprid". At the beginning of seeing dead seedlings, 90% trichlorfon or 50% of the slaughtered pine seedlings were used to control the giant salamander. Using emamectin benzoate, at the end of the new maize leaf stage, the maize leaf rate reached 10%, and 1.08-1.44 grams of active ingredient per acre was mixed with 10 kilograms of fine sandy soil to become toxic soil, which was thrown into the new corn leaves. The top 4-5 leaves of the clumps control corn borer. Adopting measures such as draining water, reducing the humidity in the field, and removing the diseased leaves from the base to reduce the damage of sheath blight, the base of the plant can be sprayed with 20% Jinggangmycin 25g and water 50kg at the initial stage of sheath blight.
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