First, preparation before the broadcast
1. Select excellent varieties: Zhengdan 958, Nongda 108, Linao No. 1, Denghai No. 9, Yongyu No. 2, etc.
2, before the sowing. It can kill seed bacteria and increase germination rate.
3. Seed dressing before sowing. Seed dressing with fungicide or insecticide, mix well and dry hair to sow. For mixed pests in underground pests and corn diseases, mixed pesticides are recommended for seed dressing. Mix the insecticide with the pesticide first, and then mix it with the fungicide.
Second, sowing
1. Promote the use of no-till seeding technology, that is, the shovel seeding technology. This sowing form is provincial, time-saving and labor-saving. It does not need to plow the land, reduce soil erosion, save farmland costs and improve planting efficiency.
2. When sowing, the amount of sowing is generally controlled at 1.5 to 2.5 kg, and the sowing depth is controlled at 3 to 5 cm. The seedlings are too deep and weak, and too shallow is not easy to emerge. At the same time as planting, apply a certain amount of fertilizer to make fertilizer. For example, when 15 kg of potassium carbonate is applied per mu, the seed fertilizer can effectively control corn stalk rot (also known as bacterial wilt). The leaves of the diseased plants are dark gray-green, and the early premature aging is dead, and the ears are drooping, often causing lodging. Therefore, the application of a certain amount of fertilizer, not only promote seedling growth, but also prevent disease occurrence.
Third, timely watering
The sowing of corn shovel is also called smashing and sowing. Generally, the soil temperature is small. After sowing, water should be watered in time to replenish the soil moisture to supply sufficient water to ensure the normal germination and emergence of the seeds.
Fourth, control weed growth
Generally, it is mainly based on chemical control, supplemented by manual control, and sprayed with high-efficiency, low-residue and non-side-effect agents. It is best to spray evenly when the ground is wet within three days.
5. Timely seedlings and seedlings
After the emergence of corn, the seedlings should be early and the seedlings should be late. In the case of 3 to 4 leaves, grasp the seedlings in time, leaving two strong seedlings per hole; set the seedlings in 6 to 7 leaves, and the number of seedlings per mu should be flexibly controlled according to the variety. Such as Zhengdan 958, Yimi planting, 4000 to 45000 plants per mu; Nongda 108 is suitable for thin planting, 3,000 to 3,500 seedlings per mu; and 2,800 seedlings of Linao No.1. When fixing seedlings, it is necessary to go to weak seedlings, self-crossing seedlings, and diseased seedlings, and keep high and short, fine and uniform seedlings with thick stems. Change the seedlings into hand-made seedlings. If there are missing seedlings, you can leave two strains before and after. The time between seedlings and seedlings is controlled after 4 pm on sunny days. The number of infected pests and larvae is prone to wilting after sun exposure, which is easy to identify.
6. Prevention and control of seedling pests and diseases
1. Laodelphax striatellus and aphids are poisonous insects of corn, which are sprayed with 50% phoxim emulsifiable concentrate or methamidophos emulsifiable concentrate 1000 times.
2, prevention and control of corn virus disease in the corn one leaf and one heart period, with 1.5% phytopathic No. 2 800 ~ 1000 times liquid, spray every 7 to 10 days, while continuing 2 times, evenly spray on both sides of the leaves.
3, the occurrence of armyworms, prevention and control of wheat worms, once it occurs, the use of 2.5% trichlorfon powder 2.0 ~ 2.5 kg powder spray or 50% phoxim 800 times solution spray, while treating caterpillars, cotton bollworm And other pests.
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