Corn production should focus on key technologies such as seedling quality, planting density and early management. Vigorously promote corn special compound fertilizer and Tiankan corn planting. Combine the market demand to moderately develop vegetable corn and try to plant special corn. High-yield and high-quality hybrid new varieties are selected: high-yield and high-quality hybrid hybrids with large spikes and large grains, high 1000-grain weight, strong disease resistance, moderate growth period, compact or semi-compact plant.
Deeply loose the soil, apply enough base fertilizer, deep pine 25 cm or more, fine land preparation. The soil is required to be finely crushed, no large clods are overhead, the ground is flat, the soil is loose, and the surface of the cultivation is covered with a fine layer of soil. Repression after land preparation. Organic fertilizer 1500kg / mu, according to soil fertility, apply NPK effective content of 45% of corn special compound fertilizer (or slow release fertilizer) 35-50kg / acre.
The cultivation technique of wide and narrow corn is planted in a wide and narrow row. The wide behavior is 70cm and the narrow behavior is 40cm. According to the characteristics of different varieties, the plant spacing is 25cm and the corn density is about 4800. The spring is planted in the middle of May, and the summer is planted after the wheat is harvested, that is, in mid-June. Flat sowing, sowing depth 3-4cm. Immediately after sowing. In the 9-11 leaf big bell mouth period, the application of urea 25kg / mu.
After sowing, if the soil surface is good, it can be treated with soil agent before sowing. Use 40% acetylated mixture or 38% atrazine SC150～200 ml/mu, spray with 40L water, or use 50% B. Oxalic EC EC 100 ml/mu to 50L water for closed spray; if the surface is not good, nicosulfuron-methyl is used to weed in the 3-5 leaf stage after seedling. Strict use of the dose, medication conditions, the use of secondary dilution method to prevent phytotoxicity.
Underground pest control in seedling stage: mainly using coated seeds. Prevention and control of corn stalk rot: prevention and control at the seedling stage, using a 15-20g of crown bacterium clear water to prevent 30kg spray. Corn large and small spot disease prevention and control: in the five-leaf stage of corn, 50% carbendazim WP or 50% methyl thiophanate 100g per acre, 75kg water, spray corn leaves, every 7-10 days Spray once and spray 2-3 times in a row.
Thrip control: When pests occur, 10% of imidacloprid WP 10g or 4.5% beta-cypermethrin 1000-1500 times per acre, evenly sprayed with 30kg of water, the liquid is sprayed in the corn heart, which can simultaneously treat aphids .
Control of armyworms: When pests occur, use 50% zinc sulphur emulsifiable concentrate 75-100g or 40% chlorpyrifos (Lesburn) emulsifiable concentrate 75-100g or 20% chlorpyrifos No. 3 suspension agent 500-1000 times per acre. 40 kg of water was sprayed evenly. Control of corn mash: In the middle of the heart, you can use the 1% phoxim granules to spread the heart leaves, applying 4-5kg per acre.
Extended reading: the technical principle of high yield of corn
This article URL: corn high-yield technology: wide and narrow line high-yield planting technology
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