In general, the types of plants that are most likely to be planted, plots with excessively high planting density, plots with prolonged emergence of seedlings, plots with excessive P- and P-level of nitrogen, plots with stalk rot and maize borer damage, and low plots In the land of water, corn is generally high in plant height, with fine stalks and underdeveloped root systems. It is prone to lodging in varying degrees when strong winds and strong rains are encountered.
Some people say that they need to straighten after the lodging of corn, and some say that they do not need to be straightened, because each person's remedies are different, and there will be great differences in the later production. Moreover, due to improper remedial measures, many people cause secondary damage such as rooting, root breaking, broken culms, and secondary lodging on corn, which often further aggravates the loss.
So, what is the most effective and rational way to remedy the fallen corn?
First, timely drainage and drainage
When the corn encounters strong winds and strong precipitation, there will be a lot of accumulated water in the ground and the humidity is completely saturated. However, corn is a kind of crop that is neither drought nor intolerant. When the soil moisture is greater than 80%, it will Fertility develops poorly. When soaked in water for more than 3 days, corn will suffocate and die.
Therefore, after the concentration of precipitation ceases, the first thing that needs to be done is to discharge the land in rows to reduce the soil moisture.
Second, foliar spray fertilizer supplement
After corn lodging, the stems and leaves of the stem trip down the ground, which will greatly reduce the photosynthesis of the leaves. At the same time, the excessive moisture in the roots of the soil will greatly weaken the absorption of nutrients and should be promptly applied to supplement the nutrients with quick-foliation foliar spray. After the weather has changed, spray the foliar with 0.3-0.4 urea + 0.3% potassium dihydrogen phosphate solution, spray once every 7 days, and spray 2-3 times successively to promote corn maturity as soon as possible.
Third, the key issue: whether it needs manual support
After the lodging of corn, whether it needs to be straightened or not, it has to be decided flexibly according to the lodging situation.
1. Mild lodging of corn processing: For those corns that are lodging lighter or semi- lodging, it is best not to straighten, especially for the lodging corn before the booting stage, it is even more difficult to carry out straightening, so as not to affect the growth and development, or even cause The lodging can be followed by the natural recovery of the foliage fertilizer after spraying.
2. Severe lodging of corn: For those corns that have fallen heavily or completely collapsed, manual support should be carried out in time, or use a wooden stick to support the spikes to prevent moldy growth. Straight, lodging for 3 days or more can no longer be straightened, so as not to cause corn injury again, broken roots or broken stalks.
Correct operation method: When carrying out artificial straightening, the method of multi-person matching, tying bundles of trees, and rooting soil should be adopted. One person straightens the plant, one person carries the soil, the number of 3-5 trees is one, and the maximum number of ties is no more than five. When the tying is done, it must be tight and solid, and the height of earth is 7-10 cm. After the soil is used, Firmly press your foot to prevent it from falling down again.
3. Stem broken corn processing: For a small amount of corn with broken stems, it should be cleared out of the field in time to prevent plant rot from inducing insect pests and cause adverse effects on the normal recovery and growth of other plants; The corn field with broken stalks can be supplemented with crops with shorter growth periods after clearing the broken ones, such as cabbage and radish.
4. Prevent diseases after lodging: When corn lodging is prone to diseases such as brown spot and leaf spot disease, it should be possible to spray 300 times 75% chlorothalonil and 500 times 50% carbendazim in time when the disease is found. 800 times 70% thiophanate-methyl and other drugs to prevent and treat 2-3 times, spray once every 7-10 days.
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