Vegetable cover mulch guard against burns

Plastic film cover is a common technique for the production of vegetables in solar greenhouses. The use of mulching can not only increase the ground temperature, reduce the evaporation of soil moisture, prevent the formation of ground panel knots, but also reduce the air humidity in the shed, reduce the occurrence and spread of diseases, and is conducive to the growth and development of vegetables. However, when the mulching film is used to create a good growing environment for vegetables, if it is used improperly, it will easily have the opposite effect, causing vegetable burns and affecting plant growth.

More common is that in sunny high temperatures, plastic film sealing is not strict, easy to burn vegetables. This is mainly due to the increase in temperature of the mulching film, which causes moisture in the ground layer to vaporize and form water droplets on the surface of the membrane. When the planting hole is exposed, the vaporized hot air under the membrane rushes out of the hole. This vaporization heat The temperature of the air, especially during sunny days when the noon temperature is high, often burns seedlings, or causes heat damage to the leaves, rhizomes, or bases of the vegetables. This not only causes damage to the plants, but also can easily infect pathogens and cause stem rot. Disease, resulting in lack of seedlings or ridges or affect the normal growth of plants, severe cases will lead to reduced production.

In addition, when the leaves are in contact with the mulching film when the weather is sunny and hot, the temperature of the mulching film is high, and it is also easy to burn the leaves. This problem occurs when black mulch film is covered.

After the vegetable is covered with the film, it can be pressed on the film with fine soil to seal the planting hole and prevent the hot gas in the film from burning the vegetables. At the same time, timely attention should be paid to the weather. In case of high-temperature and high-light conditions, shade nets should be covered in time to prevent overheating in the shed.

If it is found that the plant has been burned, the fine earth should be pressed on the mulch surrounding the plant for the first time, and the gap between the mulch and the plant should be sealed to prevent the high temperature in the mulch from continuing to harm. In addition, according to the extent of burns, the following methods can be used to deal with: 1. If burns are not very serious, you can use drugs containing ingredients such as brassinolide, gibberellin to spray, regulate plant growth, and strengthen fertilizer management. Strong plant roots allow plants to quickly return to growth. 2. If the film seedlings are small and heat damage occurs, in order to prevent stem rot and other diseases, some protective fungicides can be sprayed for prevention. 3. If the plant damage is serious, remove it in time and replace it with new plants to reduce losses.

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