Prevention of Freezing Damage in Vegetable Shed Room
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In early spring, the temperature is low and the rain is frequent. Vegetables in greenhouses are prone to frost damage, resulting in varying degrees of loss, and even no harvest. Here are a few ways to prevent freezing damage: 1. Adding cover: Put grass or corn around the shed (Wheat) straw, can increase the temperature of the greenhouse 1~2 °C; in the original grass cover and then cover a layer of film, not only can block the snow, but also allows the greenhouse to increase the temperature of 2 ~ 3 °C. 2, often cleaning, cleaning shed film: often cleaning, cleaning the dust and snow cover film, in order to facilitate the increase of light and heat, increase the temperature of the shed. 3, covering the film or a small shed: if the shed is a high ridge cultivation, can be covered in a layer of high ridge mulch; if flat ridge cultivation, can support a small arch shed, can increase the ground temperature of 2 °C or so. 4, double film coverage: in the absence of drape below the rope, take a layer of film above the wire, which is separated by air, can significantly increase the temperature of the greenhouse. 5, smoke around the shed: before the arrival of the cold, smoke outside the shed to smoke, to prevent the surrounding heat radiation to the upper reaches; but not in the shed with firewood to ignite temperature, because when the firewood burning, the smoke emitted by the great vegetables The hazards. 6, increase the application of organic fertilizer and topdressing carbon dioxide: base fertilizer buried horse dung and broken grass set brewing substances, can increase the temperature. Topdressing with carbon dioxide can provide sufficient raw materials for photosynthesis of vegetables, promoting robust vegetable growth, early maturing, and enhanced frost resistance. 7. Hanging light curtain: Hang plastic coated or tin foil coated with metal layer on the back wall of the booth and hang one every 2-3 meters to reduce the absorption of heat energy and increase the temperature of the greenhouse by 2-3°C. It can also increase the light in the greenhouse, which is conducive to the growth and development of vegetables. 8, timely exposing the grass: generally sunny morning, when the sunlight spills over the front slope to open the grass, can make the temperature within the shed not less than 18 °C; dark clouds or cloudy, the light is weak, but scattered light injection, can Vegetables carry out photosynthesis and grow strong. Improves frost resistance. 9, increase the black object: due to the black object heat absorption ability. When the greenhouse is nursed or transplanted, fine fine coal or fine coal fines can be sprinkled on the floor to blacken the ground; carbon black can also be mixed with water and sprayed on the ground to make the entire shed a solar cooker. , Can make the temperature of the shed 2~3 °C, or black plastic film in the shed to increase the temperature. 10. Spray anti-freezing element: use "freeze-killing will be applied". When using, it can be sprayed or brushed. 400 to 600 times of liquid can be used for spraying. When brushing, it is only diluted to 5 to 100 times. Spraying (brushing) the plants in the early stage, spraying (brushing) the leaves, flowers, buds, etc. of the vegetables during the spraying may play a role in preventing cold and freezing.