1、 Seedling stage

1. Sowing: a living seed is buried in the soil. If the temperature and humidity are appropriate, it will grow seedlings in about 6 days. When it reaches the three leaf stage, the nutrition in the seed will be exhausted. It is the milk leaving stage, that is, the first stage of corn

2. Jointing: the three leaf stage is the first turning point of maize. It will change from autotrophy to heterotrophic. This stage is mainly the flowering of roots, leaves and stems. During this period, it is resistant to drought and afraid of waterlogging. Waterlogging will lead to dead seedlings. Mild drought is conducive to root development

2、 Panicle stage

Ear stage refers to the period from jointing to tasseling, which is the second turning point of maize. At this stage, its nutrition and reproduction are carried out at the same time, which is not only the most vigorous stage of growth and development, but also the most important period of management. It's best to apply topdressing to supplement enough nutrients, promote the increase of leaves and compact stems, so as to achieve the purpose of large ears and more ears

3、 Flowering and grain stage

The stage from tasseling to maturity is called flowering and grain stage. At this time, all the leaves have been expanded and the plant has been fixed to grow. It has entered the stage of reproductive growth, which is also its third turning point. During this period, we should protect the leaves from premature aging and damage, and strive for more and heavier grains to achieve high yield