Do a good job of "four defenses" to increase corn yield

First, it is necessary to consume a lot of nutrients and water during the growth of premature aging corn, and too much water in the growth will cause soil hypoxia. At this time, the root activity is weakened and the water absorption is difficult, but the leaf transpiration is not reduced, especially on sunny days. More, easy to cause physiological metabolic disorders, leaf curling, slow growth, if the lack of fertilizer at this time, the plant will be short, even withered death. Control method: If it is rainy, it should be done to prevent and stain the sputum. If there is a trend of premature aging or yellowing of the leaves, the phosphate fertilizer should be sprayed at the beginning of flowering to prolong the green leaves and increase the ear.

Second, the anti-empty stalk mineral nutrient deficiency, can not meet the nutrient requirements of the ear differentiation period, or the density is too large, light and weak, and nitrogen fertilizer, less phosphate fertilizer, lack of potassium, etc. will cause empty stalks. Prevention and treatment methods: attention should be paid to the density during planting. It is required that large rows of corn are not sealed to ensure that the plants are ventilated. The nutrients and water should be supplied in an appropriate amount at appropriate time to facilitate the differentiation and development of the ear. When fertilizing, attention should be paid to the combination of nitrogen, phosphorus and potassium. .

The third is the lack of phosphate fertilizer in the soil of deficiencies and baldness. If the sugar metabolism and protein synthesis and cell division are blocked during the flowering stage of the booting stage, the top of the ear will shrink, the elongation of the filament will slow down, affecting pollination, which will lead to baldness and even empty ears. . If the soil is deficient in potassium, soluble carbohydrates are hindered from transporting to the grain, and there is less grain starch. Or early damage to insects and winds will cause the seedlings to transport insufficient nutrients, or rain during flowering, etc., which will cause baldness, mites or empty grains. Control method: To prevent premature aging of plants, it is necessary to prevent pests and diseases, and apply more phosphorus and potassium fertilizers. If it is encountered early in the spinning, it should be watered in time. It is best to carry out artificial pollination during flowering.

Fourth, the density of the anti-floating seedlings is too large, and the fertilizer and water are not properly managed when the stems are elongated, which is likely to cause lodging and affect the yield. Control method: When planting, it is necessary to deepen the cultivation layer, increase the application of base fertilizer, and properly cultivate the soil during the cultivating, so that the corn can be stabilized. At the time of fertilization, attention should be paid to the combination of nitrogen, phosphorus and potassium, and the plant density should be paid attention to ensure that the leaves in the growing season have sufficient sunlight to make the plants thick and strong, so as to increase the lodging resistance.

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