Introduction to the winter fertilization of greenhouse vegetables

In the cultivation of greenhouse vegetables, we should all know that the roots of vegetables are the main organs for the absorption of nutrients by vegetable plants. If the roots absorb insufficient nutrients, they will cause multiple hazards. The main reason for this phenomenon is the management of fertilization and watering, especially in winter, there are many things to be aware of. The following small series will elaborate on the precautions for fertilizing vegetables in greenhouses in winter.

First, be careful not to fertilize under drought conditions

Most of the vegetables are water-loving crops. If the soil is fertilized under drought conditions, not only the fertilizer effect is not obvious, but also the vegetable roots are easily caused. Therefore, winter greenhouse vegetable fertilization should be combined with irrigation, or ditching and fertilizing.

Second, be careful not to use unfertilized cake fertilizer directly

In general, the cake fertilizer contains more nitrogen, and it is easy to produce high temperature after application, causing the vegetable to burn roots. Therefore, be careful not to use the cake fertilizer without decomposing directly. The cake fertilizer should be used after high temperature fermentation treatment.

Third, pay attention to potash and calcium fertilizer do not spray together

Potassium fertilizer and calcium fertilizer spray together, it is not easy to be absorbed by the leaves of vegetables, so it is best not to spray together, but boron and calcium, zinc and iron spray at the same time will be better.

Fourth, be careful not to use more chlorine-containing fertilizer

Fertilizers containing more chlorine will reduce the starch and sugar content of vegetables, have a bad influence on the quality and yield of vegetables, and are also likely to cause acidification of the soil. Therefore, it is not recommended to use fertilizers containing more chlorine.

5. Pay attention to water-soluble fertilizers.

Generally, the soil temperature in winter is low, and the root absorption capacity of vegetables will become poor. If a large amount of water-soluble fertilizer is applied at one time, the amount of fertilizer that can be absorbed by vegetable roots is actually very small. When applying fertilizer to greenhouse vegetables in winter, it is best to use them in small quantities and times.

There is also a point to be paid attention to in winter greenhouse vegetable fertilization. Vegetables generally need more potassium fertilizer before and after flowering. During this period, potassium fertilizer can be added in an appropriate amount, and then slowly reduced.

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