First, prevent premature aging. Because corn plants are tall, they will inevitably consume large amounts of nutrients and water during growth. When there is too much water in fertility, the soil will be deprived of oxygen. At this time, the root activity is weakened and the water absorption is difficult, but the transpiration of the leaves is not reduced, especially on sunny days, the leaves consume water. More, it is easy to cause physiological metabolic disorders, curled leaves, slow growth, if the lack of fat at this time, there will be short and thin plants, and even withered to death. Control methods: If there is a rainy area, drainage and anti-smuting should be done well. If there is a trend of premature aging or yellowing of the leaves, the application of fine fertilizer or spraying of phosphorus fertilizer should be applied at the early stage of flowering to extend the green leaves and increase the ear. Or potassium sulfate fertilizer can also prevent premature aging.
The second is anti-air stalks. Insufficient supply of minerals and malnutrition cannot satisfy the requirements for nutrients during ear differentiation, or the density is too large and the photosynthetic intensity is weak, while nitrogen fertilizer, low phosphorus, and potassium deficiency all cause empty stalks. Control methods: When planting, attention should be paid to the density, which requires Daehang corn not to be sealed to ensure ventilation and ventilation of the plant. It is necessary to supply nutrients and moisture in a timely manner in order to facilitate ear differentiation and development. At the same time, attention should be paid to nitrogen, phosphorus and potassium during fertilization. The three elements are properly combined. The soil with poor soil fertility should be applied with more organic fertilizer. In areas with high soil fertility, more phosphorus fertilizer should be applied during the seedling stage in order to grow long roots and strong stalks. During head differentiation, fertilization should be carried out. If too dense or weak, please pull it out in time.
The third is to prevent lack of grain and baldness. There is a lack of phosphorus in the soil. Plants in the flowering stage of booting, such as sugar metabolism and protein synthesis, cell division is blocked, the top of the ear will shrink, filament elongation will also slow down, affect the natural pollination, it will lead to bald or even empty ears. Soils such as potassium deficiency, transport of soluble carbohydrates to the grain are hindered, and grain-starch starch is also necessarily less. Or early infestation of insects, wind damage caused by the lack of nutrient delivery, or flowering during the rain, pollen fertilization obstruction, etc. will cause baldness, pods or empty grains. Control methods: To prevent premature plant failure, the key is to prevent pests and diseases, apply more phosphate fertilizer, potash fertilizer, such as drought in case of spinning, watering and irrigation in time, the best flowering artificial pollination.
The fourth is to prevent lodging. The density of exudates is too large. When the stems are elongated, the management of fertilizers and water is improper, which can easily cause lodging and affect the yield. Control methods: When planting, we need to deepen the cultivation layer, increase the base fertilizer, properly cultivate the soil when cultivating, and make the corn stably. Fertilizer should pay attention to the combination of nitrogen, phosphorus, and potassium, and pay attention to the plant density to ensure that the growing leaves have enough sunlight to make the plants robust and thicken the seedlings to increase their lodging resistance.
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