There are many reasons for the occurrence of red seedlings in corn, mainly due to the following reasons. One is phosphorus deficiency. The phosphorus in the soil can not meet the growth requirements of the corn seedling stage, the root growth and development are hindered, the seedling growth is slow, and the phosphorus content in the seedlings gradually decreases, and the leaves turn from dark green to red or purple. The second is the accumulation of water in the field. The soil moisture is high, which affects the respiration of the root system, and the growth of the root system is hindered, resulting in plant malnutrition and redness and purple. The third is underground pest damage. The roots of the seedlings are bitten by underground pests, and the water absorption and absorption capacity are weakened, which causes the seedlings to weaken and form red seedlings. Fourth, it is caused by other reasons. If the soil is too sticky, the seeding is too deep or too shallow, and the burning of the seedling caused by improper fertilization, improper treatment of the pesticide caused by seedling poisoning, etc. will lead to red seedlings.
For the above reasons, the following measures can be taken for prevention and treatment: early application of phosphate fertilizer should be based on quick-acting phosphate fertilizer, 10~15 kg of calcium phosphate per acre, and 1% superphosphate leaching solution combined with insecticide spraying; Land, excavate the drainage ditch, so that the rain stops and the water is dry, and there is no water in the field.
For the above reasons, the following measures can be taken for prevention and treatment: early application of phosphate fertilizer should be based on quick-acting phosphate fertilizer, 10~15 kg of calcium phosphate per acre, and 1% superphosphate leaching solution combined with insecticide spraying; Land, excavate the drainage ditch, so that the rain stops and the water is dry, and there is no water in the field.
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