Three preparations before broadcasting
Seed preparation: The mid-late maturing varieties such as Shendan No.10, Shendan No.6 and Yuyu22 with high yield potential, disease resistance, drought resistance and stress resistance are selected as the main varieties. Requirements for coated seeds, uncoated seed Yaojibanzhong before sowing, seedling and soil pests in order to prevent the occurrence of pests and diseases.
Preparation of fertilizer: According to soil fertility measurement and target yield preparation, formula fertilization or special fertilizer. The output index is 600-800 kg/mu, and the basic fertility index is: quick-acting nitrogen fertilizer is less than 40 mg/kg, quick-acting phosphorus is less than 8 mg/kg, and quick-acting potassium is less than 100 mg/kg. Fertilizer index: pure nitrogen 16 ~ 18 kg / mu, equivalent urea 34 ~ 38 kg / mu; phosphorus 3.5 kg / mu, phosphorus pentoxide 8 kg / mu; potassium 5.7 kg / mu, equivalent to potassium oxide 8 kg / mu , organic fertilizer 4000 kg / mu. Organic fertilizer and phosphate fertilizer are all applied as a base fertilizer.
Film preparation: a film with a thickness of 0.005 to 0.007 mm and a width of 70 cm is used.
Sowing
When the ground temperature of 5 cm is stable and stable above 7 °C, it can be sown, generally 10 to 15 days earlier than the open field corn. Broadcast in early April. The mulch corn is used in two rows of ridges, planted at a fixed distance from the planting point, 2 to 3 seeds per hole, and the depth of planting is 3 to 4 cm. The width and narrow rows are implemented, the small row spacing is 30 to 40 cm, and the seedlings are 3,500 to 4,500.
Strengthen field management
Timely release of seedlings, seedlings, and cultivating. The fields that are first mulched and mulched are used. When the leaves of the seedlings become green apex, the seedlings are broken in time. When the seedlings are placed, the greens should not be placed, and the spurs should be released. At noon, the wind is not the principle of Fangmiao, Fangmiao immediately after the film seal the hole with soil to prevent moisture ran cool, the breeding of weeds. During the seedling clover, five leaf stage Dingmiao. Dingmiao, cultivating ditches, tillage soil moisture, remove the weeds.
Timely fertilizer
In the jointing stage (7-8 leaf stage) chase attack straw fertilizer, top dressing fertilizer accounts for about 55% to 60%, generally acres topdressing urea 8 to 10 kg, chasing large bell (12 to 14 leaf stage) Applying panicle fertilizer, the amount of fertilization accounts for 40% to 50% of the topdressing fertilizer, and the general application of urea is 5-8 kg. Topdressing method: Use a shovel or a wooden stick to make a hole 10 to 13 cm deep in the middle of each of the four corns, then apply the fertilizer and seal it with soil.
Pests and diseases
Prevention and control: focus on the prevention and control of armyworms and corn borers. Generally, 50% phoxim emulsifiable concentrate 2000 times liquid spray is used. For the land with serious damage to corn mash, 300-400 times of Bt emulsion per acre is used for sprinkler irrigation. .
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