In order to obtain high yields of corn, it is necessary to understand the fertilizer requirements of corn. Corn seedling stage is a critical period for phosphorus and potassium fertilizer. The large trumpet period before the tassel is a critical period for nitrogen fertilizer. Secondly, the determination of the amount of fertilization should be based on the production of fixed fertilizer. Generally, the land with a yield of 700 kg per mu needs to be applied with 35 kg of urea, 15 kg of diammonium and 20 kg of potassium sulfate. The plot of 800 kg of per mu should be increased. And micro-fertilizers such as zinc sulfate and borax. In addition, we must grasp the fertilization period and method. In the seedling stage, all the phosphorus and potassium fertilizers, about 20% of the nitrogen fertilizer and the zinc fertilizer should be used as the base fertilizer (fertilizer). Studies have shown that the rational application of base fertilizer (fertilizer) can increase production by about 15%.
In the period of large bell mouth, it is necessary to apply nitrogen fertilizer, about 60% of the total amount of nitrogen fertilizer, and it is best to apply about 20% of nitrogen fertilizer after tasseling. It is best to apply or ditch the hole at a distance of 10-15 cm from the corn root. Do not apply it. If it is applied in a drought, it should be combined with watering.
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