Flooded land, dredging and drainage as soon as possible
In fact, corn is a crop that is both afraid of drought and is not resistant to flooding. Experts have analyzed that when the soil moisture exceeds 80% of the maximum water holding capacity, the corn will be stunted; after being flooded for three days, the survival rate of corn is basically low. .
After heavy rainfall, if there is water in the corn field, you should try to discharge it as soon as possible, reduce the humidity in the field, and carry out top dressing in time. After heavy precipitation and flooding, soil fertility is taken away by rainwater, and topdressing can promote plant growth. You can use urea or fulvic acid nitrogen fertilizer 0.5% and potassium dihydrogen phosphate 0.2%. After completely dissolving and mixing, use the sunny day after the rain to carry out the foliar spraying and top dressing. It needs to be sprayed twice for 7 days.
For corn that is in the stage of pollination and flowering, it is necessary to apply panicle fertilizer, and 10 kg of urea can be applied per acre. Rainstorms may also affect the flowering and pollination of corn, causing the baldness of the corn, lack of grain and lack of grain. The growers can take artificial supplementary pollination by gently shaking the male flowers for pollination at 9-11 am or 4-6 pm.
If flooding causes large areas to be rejected, it is necessary to replant short-season vegetables in time to reduce losses.
    1. For corn with low lodging (the angle between the stem and the ground is greater than 45°), it is generally not necessary to take measures to ensure that it grows upright naturally. Corn is lodging before the booting stage, and it cannot be moved. It can be folded naturally within 3 days after lodging. The stem section near the ground quickly roots. As the amount of roots increases, there will be no secondary lodging, which has no effect on production. Once it is lifted up, it will inevitably hurt the roots, and will no longer take root, not only affecting the output, but also prone to secondary lodging.
    2, for the lodging is serious, especially the corn, should be artificially straightened in time, and cultivated in the roots. Because the first and second sections of the base of the corn stem are relatively fragile, it is necessary to prevent breakage and increase root injury when straightening. The method of straightening should be coordinated by two people. One person should be straight and one person should cultivate the soil. The height of the soil should be 7-8 cm, and the foot should be used after the soil is cultivated. Corn should fall after heading, not cut leaves, not to head. Can only support the tie. When the tie is tied, put the ear on the rope, and do not tie the ear to the bottom. The number of ties is best with 3-4. No more than 5 trees, more than 5 trees, and it is easy to break when it is stormy. Tighten when you tie it, you can't loose it. The time required for the tie, the day fell, the day was finished. It can be up to 3 days. After 3 days, you can't help again.
    3. For corn with broken stems, the broken plants should be removed from the field as soon as possible to avoid decay and affect the growth of normal plants. If the stem is broken, the plot should be cleaned and the plot should be cleaned up to replant the vegetables such as radish and cabbage with short growth period.
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