How to top up corn in summer?

How to top up corn in summer? Please introduce that corn is a high-yield crop, which requires a large amount of fertilizer. Scientific fertilization is necessary to meet the nutrient needs of corn in the whole growth period, and to achieve the goal of high quality and high yield. In recent years, due to the large-scale popularization of hard stubble sowing technology, the use area and amount of summer corn base fertilizer are relatively small, so topdressing is particularly important to improve the production level of summer corn. To this end, corn expert Liu Pingshe suggested that we should grasp the following four points for summer corn topdressing. First, it is necessary to cooperate with fertilization of summer corn in addition to a large amount of nitrogen fertilizer, phosphate fertilizer and potassium fertilizer also play an important role in obtaining high yield. Zinc fertilizer also has an obvious effect on increasing production. Therefore, summer corn topdressing must be the combination of nitrogen, phosphorus, potassium and micro-fertilizer, according to the target yield, according to what is missing, according to the principle of how much to make up, soil testing formula fertilization. Fields with an output of 600 kg per 667 square meters with medium fertility without base fertilizer are generally applied with zinc fertilizer for about 40 kg of urea, 25 kg of diammonium and 15 kg of potassium sulfate. Second, step-by-step fertilization can not only improve fertilizer use efficiency, but also meet the needs of growth and development of summer maize at different growth stages, especially play an important role in preventing late de-fertilization and premature senescence and improving seed setting rate and grain weight. The first fertilization is usually in the 7-leaf stage, all diammonium and 40% nitrogen fertilizer are applied, and zinc fertilizer is not applied in the base fertilizer. The second time is usually about 13 leaves, applying the remaining 60% nitrogen fertilizer. Third, it is necessary to focus on fertilization for fields with small and weak seedlings or replanting, transplanting seedlings and weak seedlings due to late sowing, "partial eating and drinking" and appropriate application, so as to promote the growth and development and the early development and rapid growth of weak seedlings. Fourth, to avoid spreading fertilizer to improve fertilizer utilization rate, general topdressing should be applied in holes or ditches, and irrigation should be made in time when the soil moisture is poor. In production, in order to reduce the amount of labor and improve efficiency, some people generally combine irrigation, apply with water, or borrow Rain Water before fighting for rain, and the effect is also good. Click to get more corn planting techniques click to get more food crop planting techniques