Matters needing attention of plastic film mulching in vegetable greenhouse

Vegetable cultivation is very common in our country. Now no matter what vegetables are planted, they are usually planted in greenhouses. When growing vegetables in the greenhouse, plastic film mulching is indispensable. When covering the vegetable greenhouse, there are many places that need us to pay more attention to. So what are the specific ones? The following editor brings you the precautions of plastic film mulching in the vegetable greenhouse, let's have a look!

1. Pay attention to the selection of plastic film

The choice of plastic film is the first thing we need to pay attention to. Plastic film is generally divided into industrial film and agricultural film. When we grow vegetables, we must give priority to agricultural plastic film, not industrial plastic film. Because the industrial plastic film contains certain toxic substances, it will cause harm to crops, and when it is serious, it will cause no harvest. While the agricultural plastic film is mainly transparent film, black film and silver gray film, when we choose plastic film, we should make a reasonable choice according to its seasonal changes and planting crops. If you need to keep warm and humid, then you should mainly use transparent film, and if you want to cool down and weed, you should use black film.

2. Pay attention to water management

When covering plastic film, many people think that plastic film can retain water, so they ignore the management of water after plastic film mulching. The premise of the water conservation function of plastic film is that there is water in the soil. Therefore, before we cover the plastic film, we should pour sufficient water, increase the soil water content and ensure the emergence rate, which is also the key to ensure the healthy growth of vegetable seedlings. However, if the soil is too sticky and heavy, too much water content leads to the reduction of oxygen content, then it is very disadvantageous to the germination of vegetable seeds. Therefore, it is necessary to air it, wait until the appropriate humidity and then cover the plastic film to avoid excessive humidity and rotting roots and dead seedlings.

3. Pay attention to the sowing time

Covered with plastic film when growing vegetables, because of its good heat preservation performance, good soil moisture and fast seedling emergence. Therefore, if you encounter the phenomenon of late frost, it is very easy to cause seedlings to freeze, from the emergence of dead seedlings. Therefore, we must pay attention to control the sowing time, first of all, we must consider the environmental requirements of the seedlings. Then there is the frost period in the planting area, and finally the time from sowing to emergence of the planted variety. To ensure that the three conditions are suitable, then it is best to sow before the final frost period to ensure that seedlings can emerge after the final frost period, which is very beneficial to its yield.

4. Pay attention to fertilization

Many people will apply fertilizer blindly in order to increase the yield in the process of planting. Especially when sowing, strip application will be carried out, which will not only lead to waste of fertilizer, increase planting costs, but also lead to fertilizer damage and burning seedlings. However, some people think that mulching plastic film can increase the yield, so the use of organic fertilizer and chemical fertilizer is greatly reduced, which leads to the phenomenon of vegetable de-fertilization in the later stage and reduce the yield. When we fertilize, no matter what fertilizer is, we should mainly apply fertilizer in the whole layer, turning it to a depth of about 25 centimeters to ensure that it is fully mixed with the soil and avoid shallow application on the topsoil. Finally, the amount of fertilizer should be controlled, and the organic fertilizer should be fully mature.

The above is a brief introduction to the matters needing attention of plastic film mulching in vegetable greenhouse. That's all for today's introduction. This article is for reference only. I hope it can help you all.