If corn wants to have a good yield and apply fertilizer, it must be fertilized three times according to the growing period.

At present, corn topdressing has been rarely adopted by farmers. At present, the maize fertilization method adopted in production is the integration of sowing and fertilization, that is, corn slow-release compound fertilizer is applied into the hole at the same time, eliminating the late topdressing link. From this point of view, the strategy of topdressing seems a little conservative.

On the one hand, because the current peasant friends are in a hurry to go out to work, they do not have to travel halfway home to fertilize, and on the other hand, most of those who remain in rural areas are old, weak, sick and disabled, and their physical strength is not strong enough, so the intermediate fertilization links that can be avoided are also avoided. Therefore, the selection of special slow-release fertilizer for corn has become the preferred scheme for maize planting.

However, for those friends who still use midway fattening, the following is also an introduction, hoping to help them.

As for the best choice of topdressing for corn, it is natural to choose it according to the law of fertilizer demand of corn. If the law of fertilizer demand of corn is not clear, it is difficult to apply fertilizer blindly.

Seedling stage

At present, corn sowing in Huang-Huai-Hai area of China is generally wheat stubble or garlic stubble, while the northeast region basically uses ploughing and applying base fertilizer to sow. For the ploughing and fertilization in Northeast China, there is already a lot of base fertilizer as the base fertilizer. Because the nutrient demand of maize plant is relatively small in the seedling stage, there is no need to apply topdressing, and the base fertilizer can be completely satisfied.

The wheat stubble in Huang-Huai-Hai area is the weakest in fertility, but in practice, there is no need to adopt topdressing. After all, there is little need for fertility at the seedling stage.

To sum up, it is not necessary to adopt topdressing at seedling stage. However, for wheat stubble, topdressing can also be taken if the corn is yellowed or purple seedlings appear at the seedling stage. After all, we still have to choose fertilization according to the actual situation!

Jointing stage

The jointing stage still belongs to the corn vegetative growth stage, and the demand for nitrogen fertilizer is relatively high, but the current production always seems to be overnourished, so the jointing stage is also the stage to control the prosperity of corn! Therefore, if we consider topdressing at the jointing stage, we should not be blind. We must apply fertilizer selectively according to the growth status of corn in the field.

Loudspeaker stage

This period belongs to the critical stage of maize vegetative growth and reproductive growth, so when considering corn fertilization, we should apply more phosphorus and potassium fertilizer, such as potassium dihydrogen phosphate or urea + potassium chloride (potassium sulfate) combination. In order to meet the nutritional needs of corn.

In addition, it is the filling stage of corn, although fertilization can also be considered in this stage, but generally in the big trumpet period one-time topdressing to meet the nutritional supply, to avoid multiple fertilization in the field.

Through the above analysis, Scientific Xingnong believes that it is very practical for early spring corn in Northeast China or summer corn in Huang-Huai-Hai region to choose topdressing in the big trumpet period as far as possible in corn production. Of course, if the conditions operate, you can also choose to topdressing at the jointing stage.

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