How to Do Corn Topdressing Well? Key Methods and Techniques Explained

Corn is a high-yield crop with a large fertilizer requirement, and scientific fertilization is the key to achieving high and stable corn yields. Reasonably determining fertilization methods and techniques according to the fertilizer requirements of corn is the key to achieving high and stable corn yields, and is also the main measure for obtaining maximum economic benefits.

Topdressing is mainly based on quick-acting nitrogen fertilizer, and an appropriate amount of potassium fertilizer can be applied along with it according to the different growth stages of corn. The scientific topdressing method for corn consists of three topdressings, namely seedling fertilizer, jointing fertilizer and ear fertilizer; however, in agricultural production practice, the seedling fertilizer and ear fertilizer are often omitted or merged into the jointing fertilizer, and some even adopt a one-time fertilization method and simply do not do topdressing at all. From a scientific point of view, without slow and controlled release agents, one-time fertilization is not advocated.

Foliar fertilization, as an economical and effective fertilization measure, such as spraying corn at the seedling stage and jointing stage with foliar fertilizers such as potassium dihydrogen phosphate, plant growth regulators and humic acid, has a certain effect on increasing corn yield, and especially under adverse conditions such as drought, low-temperature chilling injury and phytotoxicity, the effect of spraying foliar fertilizer is even more significant.

Precautions for corn topdressing: reasonably determine the topdressing time, apply fertilizer deeply, and topdress according to growth conditions. Apply potassium fertilizer in an appropriate amount. Reasonably apply foliar fertilizer. Zhang Cuiyun