According to the weather forecast, in June, rainwater in many places in the country was generally higher. For greenhouse vegetables, the outlet is the main channel for rainwater to enter the shed. In the production, often due to the close of the outlet, the rainwater will not enter the shed, causing the vegetables to die.

Install a waterproof membrane at the air outlet

Add a layer of film on the inside of the front face of the greenhouse to prevent rain. The specific approach is: this film can be about 50 cm in width, if it is too wide to block ventilation, the length is the same as the length of the front face of the shed. One end of the film is covered with soil at the bottom of the front face of the shed, and it is tightly attached to the lower end of the insect net, and the other end is fixed on the column at the front face with a rope or wire. The film between the two columns is then tied with rope or wire. Hang it to make the membrane a canal, and a dozen centimeters high “thin film barrier” is formed near this end of the column. Through this arrangement, not only can some rainwater be blocked when it rains, but it can also catch some rainwater and prevent rainwater from entering the shed. In addition, a rain film should be installed below the ventilation openings at the top of the greenhouse to allow the rainwater to enter the shed, and the membranes will flow into the drains at the back wall of the shelter.

Install smart ventilation equipment to quickly close the air outlet

In summer, unexpected rains appear to be numerous and often occur within ten minutes or even minutes. Even if the vegetable growers are working in the shed, they may not have time to close the air outlets, causing rainwater to enter the shed. Many smart ventilation devices currently available on the market can quickly close the air outlets of greenhouses. A shed can be used for a few thousand dollars. When unexpected rainfall occurs, the air outlet can be closed in time by using a mobile phone remote control. Conditional farmers can consider it.

Excavate the ditch at the outlet

The ditches to be dug are not too deep to block or store the rain water left over from the shed film, and the height of the ditch near the vegetable is prevented from overflowing into the rows after the rain has accumulated in the ditch. Ditches can also be dug on both sides of the arch. Such a storage ditch is mainly for rainfall with long rainfall and little rainfall, and must be closed when the rainfall is large. Instead of digging trenches, only the soil between the vegetables and the front face can be trimmed to form a slope that is low in the south and high in the north, and laying old membranes on the slopes can also achieve good results. This will not affect the ventilation, but also Allow rainwater to flow outwards to prevent rain from entering the shed.

Once rainwater enters the shed, the vegetable farmer should promptly remove the accumulated water and remove the soil around the base of the vegetable stem, speed up the evaporation of water, allow part of the root system to fully contact the air, and re-cover the soil after 2~3 days. When the soil on the shed is dry and wet, it is time to scratch. At the same time, rooting fertilizers such as amino acids, humic acids, or chitin can be used.

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