Maize is a high-yielding crop that requires a large amount of fertilizer and must be reasonably fertilized in order to meet the nutrient requirements of maize throughout its growing period. According to the survey, the production of 100 kilograms of corn seeds requires 2.5 kg of nitrogen, 1 kg of phosphorus, and 2.1 kg of potassium. If the mu yields 500 kg of corn, the mu needs about 33 kg of urea, or 50 kg of ammonium nitrate, 31 kg of superphosphate and 13 kg of potassium sulfate. The three stages of corn growth require different proportions of fertilizers. The seedling stage accounts for 2% of the total required fertilizer, the panicle stage accounts for 85%, and the grain stage accounts for 13%. Maize from the jointing stage to the Dagukou period is the peak period of fertilizer demand, so according to the amount of fertilizer required by the maize, fertilizer requirements, to achieve a reasonable fertilization, that is, base fertilizer, seed fertilizer, top dressing combination; nitrogen fertilizer, phosphate fertilizer, potash fertilizer combination Agricultural fertilizer, chemical fertilizer, biological bacteria fertilizer combination. The base fertilizer should be given enough. This is the basis. In general, 2000 kg of organic fertilizer applied in the Mushi, 7,5 kg of phosphorus pentoxide, and 5 郾 5 kg of potassium fertilizer are used as the base fertilizer. In order to increase the yield of corn and improve the quality, the production should be properly grasped and grasped earlier, reasonable fertilization should be carried out, and top dressing should be done to “eat fewer mealsâ€, when it needs to be chased, what needs to be pursued, and how much it needs to be pursued to satisfy The need for nutrients for corn growth and development. In the base fertilizer, seed fertilizer application level is not high, soil conditions are poor, planting late-ripening varieties of land, in the corn 6-7 leaf stage, top dressing, mu recovery urea about 15 kg, deep recovery of 15 cm or more, increase fertilizer Utilization rate; base fertilizer, seed fertilizer applied to a high level of land, mu recovery urea about 10 kg. Corn fertilizer should be carried out as early as possible. Generally, the fertilizer is applied in combination with shoveling the fertilizer twice. The method is to apply fertilizer in the front, reclaim the land in the back, and combine the top dressing with the topoil to reduce the volatilization and increase the utilization rate of the chemical fertilizer. Second, use the grind pit to chase deep into 15 cm. Above, to play a fertilizer effect; third is to use fertilizer, deep chase more than 15 cm, top dressing, the combination of chemical fertilizers and biological fertilizers to promote good root development, under normal circumstances, acres of 10-15 kilograms of urea, plus 1 kg of biological bacteria , can activate the soil and mature earlier. At the heading stage of grain filling stage, 0.25 kg of potassium dihydrogen phosphate and 0.5 kg of urea are used for mu, and 50 kg of water is sprayed on the foliage to prevent the tipping and lack of grain, increase the yield and improve the quality. Organic food corn, can not use fertilizer The best use of fermented organic fertilizer, as the base fertilizer, top dressing with cake fat, fertilizer effect is stable and lasting, the effect is better than chemical fertilizer, and long-lasting, but when top dressing, cake fertilizer and crop seedlings to maintain a proper distance, so as not to The heat generated during the fermentation of the cake fat burns the seedlings.