How to top-fertilize corn for high yield?

How to top-fertilize corn for high yield? Please guide corn to use the following fertilization methods: 1. Application period: 15 days before and after the heading of corn, no later than the silking period of corn, which is the application period of maize tapping fertilizer. Too late, it is easy to cause corn green and late ripening, affecting the sowing of the next crop. two。 Types of fertilizers: it is not easy to apply fertilizers with long effective period. Quick-acting nitrogen fertilizers, such as urea, ammonium bicarbonate and ammonium sulfate, should be applied. These fertilizers have a quick effect and are beneficial to the accumulation of corn starch. 3. Fertilizer amount: the amount of attack grain fertilizer need not be too much, too much will easily lead to late ripening of corn. The specific amount of topdressing should be determined according to the type of maize varieties. Compact corn has strong fertilizer tolerance, large population and high productivity per plant. Proper application of more fertilizer in the later stage will not cause greedy green and late ripening, but will promote yield increase. The amount of topdressing should account for 20% of the total amount of topdressing, and urea can be applied 8 kilograms per mu. Too much topdressing of flat corn will cause greedy green late maturity, affecting the sowing of the next crop, the amount of topdressing should account for 10% of the total amount of topdressing, and about 5 kg of urea can be applied per mu. 4. Timely watering: when applying grain-attacking fertilizer, we must water in time, combine fertilizer with water, promote fertilizer with water, and give full play to the role of fertilizer in increasing production. If there is more precipitation and sufficient soil moisture in the later stage of corn growth, it can only be fertilized and not watered. Click to get more corn planting techniques click to get more food crop planting techniques