Is topdressing corn better before rain or after rain? When is the best topdressing time?

Generally, when corn grows to 6-8 leaves, it is the jointing stage of corn kernels, just waiting for rain. When the weather forecast says there will be moderate to heavy rain, some farmers will pull the organic fertilizer into the field and sow it, and then fertilize it after the rain. However, the weather changes rapidly in summer, and the weather forecast is sometimes inaccurate, so farmers have to wait for rain. There are also some farmers waiting for the rain to spread. Anything can be done as long as it can be sprinkled around rainy days. Whether after rain, in rain or after rain, the actual effect of fertilization is good or not, depending on how you apply it.

Different fertilizers are used in different periods. Generally, high-nitrogen compound fertilizer is applied after rain and buried in soil. Because the high-nitrogen compound fertilizer melts slowly, it avoids the open distribution of nutrients. So I will choose the way of burial. If fertilization is carried out in the rain, base fertilizer is the main fertilizer, such as urea solution, which will dissolve in water, so it will penetrate into the soil layer faster. If urea solution is applied after rain, the sand will melt slowly, and it will be released publicly when it sees sunlight, which is not conducive to the digestion and absorption of green plants. When planting, fine varieties suitable for local growth should be adopted, and precision seeder should be selected for planting.

After full sowing, it is necessary to carry out a replanting and budding stage, and after the budding stage, it is necessary to carry out a fertilization and soil cultivation, and apply one mu of fertilizer as a seedling to attack fertilizer, which is also the first important link of jade harvest, followed by panicle attack fertilizer. The whole soil should be loosened during the big horn period of corn, and urea solution should be applied, 30 kg per mu. The method of fertilization is to dig a hole between two plants and apply it. Before planting, give a comprehensive base fertilizer, which is enough for the supply of nutrients in maize seedling stage. If too much fertilizer is applied at seedling stage, plants will grow very easily because they grow too fast.

Fertilization is often applied at heading stage, because the nutrients given by base fertilizer are digested, absorbed and utilized at seedling stage. If nutrients are not provided at the heading stage, corn will be expensive and easily weakened, and the nutrients in the soil must be dissolved in water before it can be digested, absorbed, transported and utilized by corn. After fertilization, corn should be kept with enough water, which is beneficial to the digestion and absorption of organic fertilizer by corn. The changes of various microorganisms and the migration of organic matter in corn also need water as a substance.