What about the burned vegetables covered with plastic film?

In recent years, plastic film mulching is often used to cultivate vegetables in the process of vegetable production. Plastic film mulching technology can not only increase the ground temperature, reduce water evaporation, prevent ground consolidation, but also reduce the humidity in the greenhouse and reduce the occurrence and spread of diseases. However, if it is not used properly, it is very easy to cause vegetable burns and affect the normal growth of vegetables, so what about burned vegetables covered with plastic film? Let's take a look.

1. Symptoms and causes

In sunny and high temperature weather, because the plastic film seal is not strict, it is very easy to cause vegetable burns, this kind of situation is mainly because the plastic film transparently increases the temperature, is to get the surface moisture and its flowers, thus forming water droplets under the film, when the planting hole is exposed, the hot air under the film rushes out from the hole, and in the case of high temperature at noon, it will cause vegetable burns. It often leads to heat damage in the roots and stems of vegetables, which will not only affect the normal growth of vegetables, but also give germs the opportunity to take advantage of the opportunity to cause diseases such as stem rot, resulting in lack of seedlings and broken ridges, and yield reduction in serious cases. In addition, at noon high temperature, vegetable leaves directly contact with the plastic film, will also burn to the leaves, so the situation is more common when the plastic film is black.

2. Preventive measures

After the vegetable plastic film is covered, the plastic film can be pressed with fine soil or clods to seal the planting hole firmly, so as to prevent the heat in the plastic film from burning the vegetables. At the same time, we should pay attention to the weather changes, in case of high temperature and strong light weather, we should cover the sunshade net in time to avoid excessive temperature in the shed.

3. Emergency measures

After it is found that the plant is burned, it should be compacted around the plastic film with fine soil in time to seal the gap between the plastic film and the plant, so as to avoid the continued harm of high temperature. If it is a mild burn, brassinolide, gibberellin and other drugs can be sprayed to regulate plant growth and strengthen fertilizer and water management to restore plant growth quickly. If the seedlings are burned, some protective fungicides can be sprayed to prevent stem rot. If the burn is more serious, it should be pulled out in time, and then transplant a new plant, that is, the loss may be reduced.

The above is the introduction of how to burn vegetables covered with plastic film. I hope it can help you. If you want to know more about it, please follow us.