How to apply fertilizer when sowing summer corn?

How to apply fertilizer when sowing summer corn? Please introduce the main reasons for sprouting and seedling burning of sowing corn such as improper application of seed fertilizer: first, the excessive application of seed fertilizer causes seed or seedling burning due to the contact between root system and chemical fertilizer in the process of seed emergence. Second, seed fertilizer and seed mixed sowing, although the amount of seed fertilizer application is not too large, but because the seed and fertilizer mixed sowing together, resulting in direct contact between seeds and fertilizer, resulting in seed burning, seedling burning. Third, pure nitrogen fertilizer is used as seed fertilizer. Some pure nitrogen fertilizers are highly volatile (such as ammonium bicarbonate), while others contain ingredients that have some corrosive effect on seeds or buds (such as biuret in urea), which can easily cause seedling burning. The fourth is to apply a large amount of seed fertilizer when sowing. As the soil moisture is better when sowing, after a large amount of fertilizer is applied to the soil, the fertilizer will quickly absorb moisture and form a scattered high concentration fertilizer film in the soil, causing damage to seeds or seedlings. In order to prevent seed fertilizer from sprouting and seedling burning, farmers should be reminded to pay attention to several problems when applying seed fertilizer: first, granular fertilizers such as nitrogen, phosphorus and potassium compound fertilizer and diammonium phosphate should be selected as seed fertilizer. This kind of fertilizer has strong fluidity, is more suitable for sowing with the seeder, and the fertilizer is applied evenly. Second, do not choose pure nitrogen fertilizers such as urea and ammonium bicarbonate as seed fertilizer. Third, in order to avoid burning seedlings and reduce waste, it is necessary to control the amount of seed fertilizer, generally speaking, it is appropriate to apply 1520 kg of nitrogen, phosphorus and potassium compound fertilizer per mu, especially when sowing while sowing, the amount of seed fertilizer should be strictly controlled. Fourth, the seed fertilizer must be applied separately from the seed, and it should be applied deeply. The horizontal interval between the seed fertilizer row and the seed row should not be less than 5 cm, preferably under the side of the seed row. Click to get more corn planting techniques click to get more food crop planting techniques