Due to the high temperature and high humidity during the whole growing season of summer maize, corn is vulnerable to many diseases. Therefore, it is particularly important to improve the quality of sowing, cultivate high-quality seedlings, and lay a solid foundation for the entire growth period. To improve the quality of the sowing and ensure the healthy growth of the corn, the following issues should be noted when planting:
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Pay attention to the use of coated seeds for seeds that have not been coated. Seed preparation before seeding, seeding and dressing. 50% carbendazim or powder rust WP can be used for seed dressing, according to the amount of seeds 0.2%~0.3% , mixed with appropriate amount of water for seed dressing, can effectively prevent corn smut, smut, root rot, etc. Use 50% phoxim emulsifiable concentrate, according to the amount of seeds 0.2% ~ 0.3% , mixed with appropriate amount of water, can control underground pests.
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Pay attention to the stalking time when planting the saying "Spring is the day, summer is the time", the early broadcast of summer corn has obvious effect of increasing production.
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Note that the seeding speed of the seeding rate should be controlled to be no more than 4 km / h.
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Note that the optimum sowing depth for controlling the sowing depth of summer maize is 3 to 5 cm. If the planting is too deep, the ground temperature is lowered, and it is easy to plant. Even if it can barely emerge, the seeds will be buried too deeply. The seeds will consume a lot of nutrients before they are unearthed. The roots of the corn seedlings after being unearthed have weaker ability to absorb nutrients. Weak seedlings. Therefore, when planting summer corn, the sowing depth should be minimized under the condition of ensuring soil moisture.
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Pay attention to the stable seeding rate of 2.5 kg per mu . The sowing amount is too small to ensure the density. If it is too large, the seeds are wasted. Generally, the density of semi-compact varieties is 3500~4000 plants / mu, and the density of compact varieties should reach 4000~4500 plants / mu.
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Pay attention to the application of seed fertilizer. The amount of seed fertilizer used for hoeing is generally not more than 5 kg / mu, and the fertilizer is not less than 10 cm from the seed . If it can be watered in time after sowing, the amount of fertilizer can be increased to about 15 kg per mu .
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