How to do a good job of topdressing corn

Corn is a high-yield crop, which needs a large amount of fertilizer. Scientific fertilization is the key to obtain high and stable yield of maize. According to the law of fertilizer demand of maize, the reasonable determination of fertilization methods and techniques is not only the key to achieve high and stable yield of maize, but also the main measure to achieve maximum economic benefits.

Topdressing is mainly available nitrogen fertilizer, and a certain amount of potassium fertilizer can be applied appropriately according to different growth stages of maize. The scientific topdressing method of corn is three times topdressing, that is, seedling fertilizer, jointing fertilizer and ear fertilizer, but in the practice of agricultural production. Seedling fertilizer and panicle fertilizer are often omitted or incorporated into jointing fertilizer, and some even adopt an one-time fertilization method, so as not to top up fertilizer at all. from a scientific point of view, one-time fertilization is not advocated without slow and controlled release agents.

Foliar fertilization as an economical and effective fertilization measure, such as spraying foliar fertilizer such as potassium dihydrogen phosphate, plant growth regulator and humic acid at seedling stage and jointing stage can increase maize yield to a certain extent. especially in the adverse conditions such as drought, low temperature chilling injury and drug damage, the effect of spraying foliar fertilizer is more significant.

Matters needing attention for corn topdressing: reasonably determine the time of topdressing, achieve deep fertilization, look at the growth of topdressing. Appropriate amount of potash fertilizer should be applied. Rational application of foliar fertilizer. Zhang Cuiyun