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Planting varieties include medium-late and late-maturing varieties such as Shendan 10, Shendan 6 and Yuyu 22 with high yield potential, resistance to disease, drought resistance, and strong resistance. It is required to use coated seeds and uncoated seeds for seed dressing before sowing so as to prevent the occurrence of underground pests and seedling pests and diseases.
The prepared fertilizer is prepared according to the soil fertility determination and the target yield, and formula fertilization or special fertilizer is applied. The output index is between 600 and 800 kg/mu. The basic fertility indicators are: available nitrogen fertilizer is less than 40 mg/kg, available phosphorus is less than 8 mg/kg, and available potassium is less than 100 mg/kg. Fertilizer indicators: pure nitrogen 16 to 18 kg/mu, equivalent to urea 34 to 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 base fertilizer.
Membrane with a thickness of 0.005 to 0.007 mm and a width of 70 cm is used as the membrane.
Suitable sowing
When the exposed ground temperature of 5 centimeters continues to be stable above 7 degrees Celsius, it can be sowed, and generally sown 10 to 15 days earlier than exposed corn. It will be broadcast in early April. The mulching corns are all on one ridge and two rows. The seedlings are planted at the planting points, with 2 to 3 seeds per hole, 3 to 4 cm sowing depth, wide and narrow rows, 30 to 40 cm spacing, and 3500 to 4500 shoots per mu.
Strengthen field management
Timely release of seedlings, Dingmiao, and cultivator use the field after the first sowing, when the leaves of the seedlings turn green and the top film, timely break the film and put the seedlings, put the seedlings to grasp the put green not put yellow, cloudy cloudy sudden release, sunny clearing At noon, the wind does not release the principle of seedlings, immediately after the release of seedlings, the membrane hole is sealed with soil to prevent run-off and cooling, and to breed weeds. Seedlings during the three-leaf stage, and five-leaf stage seedlings. After the seedlings are settled, the ridges are cultivated in the cultivator.
Timely topdressing at the jointing stage (7 to 8 leaf stages) chasing stalk manure, the amount of fertilizer is about 55% to 60% of top dressing, and the average mu topdressing of urea is 8 to 10 kg, at the big bell mouth (12 to 14 leaf stages). ) Top-dressing panicle fertilizer, fertilization accounted for about 40% to 50% of topdressing, generally 5 to 8 kg of topdressing urea. Top dressing method: Use a shovel or a wooden stick to drill a hole of 10 to 13 cm deep in each of the four corns, then apply the fertilizer and seal it with the soil.
Prevention and control of pests and insect pests focuses on the prevention and control of armyworm and corn borer. Generally, 50% of phoxim EC is used to spray 2000 times, and the land that is seriously damaged by corn borer is sprayed with 300-400 times of Bt emulsion per acre. .
High-yield and high-efficiency production technology of mulching corn
Three preparations before the broadcast