In the spring, windy and dusty weather will adversely affect the production of vegetable greenhouses. The management is not good. The seedlings are frozen, the sheds are torn, the scaffolding is overturned, the vegetables are produced, and the income is delayed.
When encountering sudden winds and rainy weather, the vegetable grower can quickly drop the floating film to prevent the straw curtain from being blown or wet by the wind. When the wind blows, turn off the air outlet to prevent the wind from scraping into the shed from the air outlet and tearing the film. Lower the grass and compact the bottom. On the lowered grasshopper, press a No. 8 wire every 1.5 meters in the horizontal direction. The wire should be fastened to the mountain wall. The grass on the shed is like a belt, preventing the wind from blowing up the grass. When the wind is blown for a long time, when the temperature is high and it is not frozen, the grass can be sprayed with water, so that the weight of the grass is increased, the grass is not easily scratched by the wind, and the grass is basically dried when the wind stops. .
For the windproof of the arch shed, the vegetable farmer should set up a windproof membrane at the bottom of both sides of the arch shed. The width of the windproof membrane should be from the underground side of the arch shed to the uppermost venting opening. For example, when the westerly wind is blowing, the vegetable grower will be on the west side. The wind-proof membrane rises, so that the strong wind can be prevented from entering the shed from the air outlet on the west side of the arch shed to prevent the wind from smashing the shed film. If the wind exceeds 6 levels, the arch shed will also open the air outlet on the leeward side, so that the windproof effect is better.
The vegetable grower should pay special attention to: the greenhouse equipped with the roller blind machine has certain wind resistance, but the wind resistance is limited. Once the wind is too strong, the wind will directly tear the fixed position of the straw curtain when the grass curtain is blown over. The damage caused is more serious than the loss of the greenhouse without the roller blind machine, so the vegetable farmers should not rely on the roller blind machine for wind protection.
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