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1 Fog prevention Fog days should be properly increased cover, insulation and antifreeze to prevent vegetables from freezing. Keep the film clean and increase the amount of light transmitted. To control the humidity, if the humidity in the booth is too large, it is necessary to ventilate and ventilate it in time; when it cannot be ventilated, weeds may be used to soak moisture in the rows of wood ash or fine dry soil.
2 Snowy days prevention If rain and snow weather occurs during the day, weeds should be rolled up before rain and snow, covered with plastic film to prevent rain and snow from adding weight and smashing the shed, and promptly clearing the greenhouse. Snow and stagnant water.
If rain and snow weather occur in the evening, a plastic film or kraft paper should be put on the grass rake on the awning, and attention should be paid to clearing the snow in time.
3 Even with the prevention of cloudy days, the uncovered grasshoppers should still be carried out normally, so that vegetables in the shed can use the cloudy scattered light to sustain their lives. At the same time, a reflective curtain can be hung in the north wall of the shed to increase dishes. The light intensity between the strains. When the number of days of cloudiness reaches more than 3 days and low temperature cold current is encountered, the temperature in the shed will fall below 5°C. Warming measures should be taken immediately. With convenient power supply, several light bulbs can be installed in the shed. Mercury lamps and fluorescent lamps are the best, which will have the dual effect of increasing the temperature and increasing the temperature. The method of using a hot wire to create a brazier is also effective in raising the temperature inside the shed.
4 Prevention of Low-Temperature Cold Waves There are generally four or five times stronger cold air in the cold winter each year. Meteorology is called cold wave. When encountering low-temperature cold weather, temperature gauges must be provided in the shed. When the temperature in the shed quickly decreases, fire paths or geothermal wires can be warmed up so that the temperature in the shed is not lower than 5°C, and at the same time, the temperature must be avoided. Rain, snow and wet pressure shed; when the temperature of the shed is lower than 5 °C, it will be given to warm, heating bulbs can be used, the bulb can increase the temperature but also increase the light, but also endogenous fire.
5 The prevention of strong winds in the strong wind prevention. It is important to listen to the weather forecast and prepare for wind protection. Ropes can be used to reinforce the shed and block the areas where the wind is to be blown to prevent loss.
If it is a seedling, it is best to use artificial climate chambers to prevent these meteorological disasters, so as to provide a safe and reliable growth environment for vegetable seedlings.
How to ensure the growth of seedlings in different meteorological disasters
In winter, after a long-term observation by small weather stations, winter sheds often have cold winds and snowfall, and five days, rain and snow, even cloudy days, low temperatures and cold waves are common meteorological disasters in winter greenhouses. How to take effective measures to prevent these natural disasters is something that every vegetable grower should consider because it can cause plastic sheds to suffer devastating damages and pose an inestimable threat to the production of greenhouses. Therefore, after winter, vegetable farmers must take early measures to deal with them.