I. Seeding and seedling management
1. Variety selection: The planting variety is mainly cultivated with high-yield and early-maturing variety Xinyu No.9 (901). It has strong growth potential and good resistance to stress, and the growth period is about 90 days.
2. Seed treatment: The seeds are air-dried before sowing, and the seed coats of the seed coats are selected and selected, and the early-maturing varieties of the seed dressings are selected to prevent the tigers from harming.
3. Land preparation and timely arable land fertilization: After harvesting wheat on or around June 20, timely fertilization and ploughing, and applying urea 10-15 kg of potassium sulphate 5 kg, fertilization can be carried out simultaneously with the seeding corn topdressing. After the replay, you should grab the robbery. When the soil is suitable, it should be deeply raked and planted in time. The quality of sowing and land preparation should reach the standard of Qi, Ping, Song, Crush, Net and Cang, and suppress before sowing.
4, sowing and sowing quality
1), timely seeding: complete the seeding task before July 5.
2), seeding amount: 3-3.5 kg per mu, the seed is evenly distributed at each hole, and the seeding depth is 3-4 cm.
3), seeding quality: Before planting, the planter is carefully debugged to achieve the best state. When planting, it is required to be tidy, the next seed is even, the sowing depth is consistent, and the post-sowing is suppressed. The porosity is less than 3%, ensuring that the seedlings are full. The average row spacing is set: the row spacing is 40 cm, the side row spacing is set to corn 60 cm, and the plant spacing is 18-20 cm. More than 4,000 seedlings per acre.
5. Check the seedlings and make up the seedlings in time; when the soil is knotted before emergence, it should be broken in time. After the emergence of the seedlings, the seedlings should be checked in time. If there is a shortage of seedlings, the seedlings should be replenished in time.
6, suitable time seedlings, seedlings; seedling time should be carried out in the 3-4 leaf stage, fixed seedlings in the 5-6 leaf stage fixed seedlings.
7. Watering at the right time; after the emergence of the corn, according to the soil moisture, the seedlings are used for irrigation, and the irrigation is carried out with small ditch. Re-broadcasting corn 6-7 leaf irrigation water, the land with poor moisture, should be filled with water in time.
8, cultivating and chemical weeding; corn seedling period, generally cultivating 2-3 times, in order to play loose soil. A shallow cultivating is carried out before the seedlings, and the depth is 3-5 cm. Perform a deep cultivating before the jointing, deep into 10-12 cm. Corn 3-5 leaves, weeds 2-4 leaf stage can be used for post-emergence herbicide 24% Kochi for chemical weeding.
Second, the middle and late stage management
In the middle and late stages of maize, it mainly refers to the field management of the earing stage and the flowering stage.
1, reasonable topdressing. When corn is 7-8 leaves, combined with mechanical cultivating, the acre is 15-20 kg of urea, and timely irrigation. If the lower leaves of the corn are pollinated during the pollination period, the phenomenon of lack of fertilizer will occur. The urea should be applied in combination with timely watering, generally 10-15 kg per mu, to prevent premature aging.
2, timely irrigation. Corn should not be dehydrated from flowering to maturity. It should be timely flooded to ensure adequate grouting. This period should generally be watered twice, the last time to control the amount of water, in order to prevent late maturity, generally should stop irrigation when the seeds become hard.
3. Rationalized control. When the corn grows to 9-11 leaves, it is sprayed evenly on the leaf surface with a corn regulator gold rod (one) and 15 kg of water per acre. It is strictly prohibited to spray and re-spray, which can prevent lodging and increase production.
Third, pest control
1. Ground tiger: When the current tiger damage in the seedling stage, the enemy kills 20-30 grams of water with 30-45 kilograms of water to prevent it.
2, red spider: When a large number occurs, the acre with avermectin or ketone emulsifiable concentrate 2500-3000 times liquid or dichlorvos poisonous soil fumigation to prevent.
3, the disease is rough disease, size spot disease, bacterial blight mainly, prevention and treatment of rough disease, size spot disease can be used 50% carbendazim WP 1000-1500 times liquid or 70% methyl thiophanate WP 1500-2000 times liquid, spray once every 7-10 days, even spray 2-3 times. Pests are mainly thrips, corn borers, and armyworms. The control of thrips can be continuously controlled in the period from the seedling stage to the big trumpet period, and it can be controlled with a salt of Weiwei or Shikuan with potassium dihydrogen phosphate. Control corn mash with 3% carbofuran granules with 0.5 kg of corn kernels per acre.
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