In the process of planting corn, if there is heavy wind and heavy rain, it often happens to fall. Lodging corn will reduce photosynthesis, reduce the formation of organic matter, and also affect the absorption of nutrients by roots, which will have a great impact on the grain filling, development and fullness of the ear, and will often lead to different degrees of yield reduction.
In general, the types of plants with high plant varieties, plots with excessive planting density, plots with long seedlings, plots with less nitrogen and excess phosphorus and potassium, plots with stem rot and corn borer damage, low hoarding In the water plot, the corn is generally tall, the straw is thin, and the root system is underdeveloped. It is prone to different degrees of lodging when it encounters strong wind and strong rain.
For the treatment of corn after lodging, some people say that they need to straighten, and some say that they do not need to straighten, because each person's remedy is different, and the later production will have a big difference. Moreover, many people suffer from secondary damage such as root damage, broken roots, broken stalks, and secondary lodging due to improper remedy, which often further aggravates losses.
So, how to remedy the lodging of corn is the most effective and reasonable?
First, timely drainage
When the corn encounters strong winds and strong precipitation, there will be a large amount of accumulated water in the ground, the humidity is completely saturated, but the corn is a kind of crop that is neither drought tolerant nor resistant to cockroaches. When the soil moisture is greater than 80%, it will Fertility is poor. When soaked in water for more than 3 days, the corn will suffocate and die.
Therefore, after the concentrated precipitation stops, the first thing to do is to carry out the drainage of the field to reduce the soil moisture.
Second, foliar spray fertilizer supplement nutrition
After the corn is lodging, the stalks and branches fall to the ground, which will greatly reduce the photosynthesis of the leaves. At the same time, the root moisture in the soil is too large to absorb the nutrient function, and the quick-acting foliar spray fertilizer should be supplemented in time. After the weather is better, the leaf surface is sprayed with 0.3-0.4 urea + 0.3 potassium dihydrogen phosphate solution, sprayed once every 7 days, and sprayed 2-3 times continuously to promote the early maturity of the corn.
Third, the key question: whether you need manual straightening
After the corn has fallen, whether it needs to be straightened, it must be decided flexibly according to the lodging situation.
1. Mildly lodging corn treatment: For those corns that are light or half-falling, it is best not to straighten them, especially for the lodging of corn before the booting stage, it is not allowed to straighten, so as not to affect the growth and development of the roots, or even cause two The secondary lodging can be naturally restored to erect after spraying the foliar fertilizer.
2. Treatment of severely lodging corn: For those corns that are seriously lodging or completely collapsed, artificial straightening should be carried out in time, or the ears should be supported by wooden sticks to prevent mildew. It is best to do the day's lodging and support the same day. Straight, no more than 3 days and more can not be straightened, so as not to cause corn roots, roots or stems to break again.
Correct operation method: When manual straightening is carried out, the method of multi-person matching, tied bundles and roots should be adopted. One person straightens the plant, one person carries the soil, the number of the 3-5 trees is one, the maximum number of tie is not more than 5, the tie should be tight and solid, the height of the soil is 7-10 cm, and after the soil is used Strike hard on the foot to prevent loosening and fall again.
3. Treatment of stalk broken corn: For a small amount of corn stalk broken, it should be cleaned out in time to prevent plant rot from inducing pests and diseases, which will adversely affect the normal recovery and growth of other plants; Corn fields with broken stems can increase the income of crops with shorter growth period, such as planting cabbage and radish, after clearing the broken trees.
4. Anti-disease after lodging: After browning, the brown spot disease and leaf spot disease are prone to occur. Therefore, when the disease is found, it can be sprayed 300 times 75% chlorothalonil, 500 times 50% carbendazim, 800 times 70% methyl thiophanate and other drugs were taken 2-3 times, and sprayed once every 7-10 days.
The corn remedy is finished, have you learned? In the actual operation process, it is necessary to adopt correct and effective methods to solve the problems in the planting management process, in order to ensure the stable production and excellent yield of crops.
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