Due to the high temperature and high humidity during the whole growing season of summer corn, corn is vulnerable to multiple pests. Therefore, it is particularly important to improve the quality of sowing and cultivate good quality seedlings to lay a solid foundation for the entire growth period. To improve the quality of sowing and ensure that corn grows robustly, the following issues should be noted during sowing:
Pay attention to the use of coated seeds For seeds that have not been coated, seed preparation, seed drying, seed dressing, and other seed treatments should be performed before sowing. 50% carbendazim or triadimefon wettable powder can be used as a seed dressing. According to the 0.2%~0.3% of the seed amount, the seed dressing can be used against the appropriate amount of water, which can effectively prevent the corn smut, smut, root rot, etc. With 50% phoxim EC, according to the seed amount of 0.2% to 0.3%, with the appropriate amount of water seed dressing, can control underground pests.
Pay attention to the time of planting the slogan as the saying goes, "Spring is in the fight, and in summer is the time of competition." Early summer sowing has obvious effect on increasing yield.
Pay attention to controlling the sowing speed. The sowing speed should be controlled to no more than 4km/h.
Note that the optimum sowing depth for controlling the sowing depth of summer corn is 3 to 5 cm. If the planting is too deep and the ground temperature is lowered, it is easy to plant seeds. Even if it can barely emerge, the seeds will be buried too deeply. The seeds will consume a lot of nutrients before being unearthed, and the roots of unearthed corn plants will have weak ability to absorb nutrients. Weak seedlings. Therefore, when sowing summer corn, sowing depth should be minimized under the condition of ensuring soil moisture.
Pay attention to the stable seeding rate of 2.5 kg per acre sowing rate for general varieties. It is difficult to guarantee the density when the seeding amount is too small, and the seeds are wasted if the seeding amount is too large. The semi-compact type density is generally 3500~4000 strains/mu, and the compact type density is 4000~4500 strains/mu.
Pay attention to the application of seed fertilizer to grab the amount of seed fertilizer used to sow the seedlings is generally not more than 5 kg / mu, fertilizer from the seed is not less than 10 cm. If timely watering after sowing, the amount of fertilizer can be increased to about 15 kg per mu.
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