Matters needing attention of topdressing in corn field

1. Determine the time of topdressing reasonably. If you apply fertilizer three times, the corn seedling stage should not be topdressing too early, 5-6 leaves is appropriate, in order to squat seedlings thick and strong; jointing fertilizer is generally 10-11 leaves, mechanical operation can be properly advanced to avoid injury to seedlings; ear fertilizer should pay attention to the amount of nitrogen fertilizer, in order to prevent greedy green; if you apply fertilizer once, jointing fertilizer should be applied.

two。 Fertilize deeply. Corn topdressing must be applied deeply, otherwise the fertilizer use efficiency will be reduced. The most suitable depth is 5cm to 10cm, and cover the soil in time.

3. Look at the growth to get fat. In the land with uneven seedlings, strong seedlings and weak seedlings should be treated differently when topdressing. The weak seedlings should be fertilized early, and if necessary, foliar fertilizer can be sprayed alone to promote the early development and rapid growth of weak seedlings, and the time of topdressing for strong seedlings should be postponed appropriately.

4. Appropriate amount of potash fertilizer should be applied. When the amount of potassium in the base fertilizer is insufficient, an appropriate amount of potassium fertilizer can be applied to make up for the deficiency of potassium.

5. Rational application of foliar fertilizer. Foliar fertilizer spraying times, spraying period and solution concentration should be used strictly according to the product instructions. The spraying time should be before 10:00 or after 3pm, or you can choose to spray on cloudy days to avoid high temperature and direct sunlight; spray evenly on the back of the leaves so that the droplets do not drop; if there is heavy rain within 3 hours after spraying, it is necessary to re-spray; foliar fertilizer should not be mixed with pesticides as far as possible.

Si Zhongfeng