In the cold winter, the vegetable farmers must know how to keep warm and keep warm? The winter solstice to the small cold has obvious cooling and continuous snowy days, which will inevitably have adverse effects on the greenhouse vegetable production. In order to ensure the safe wintering of shed vegetables and avoid undue losses, some experts here have arranged technical measures for cold-proof insulation of solar greenhouses.
1 Comprehensive inspection
Carry out a comprehensive inspection of the solar greenhouse, focusing on checking whether various measures to prevent cold in the shed are in place. If the wall is leaky, the back slope insulation performance is poor, and the shed film is damaged, it should be compensated in time. The thinner cover needs to be covered with double-layer straw curtains, and the conditional straw curtain is covered with a layer of shed film to prevent cold air conduction and prevent Rain and snow soak the straw curtain, or cover it with a layer of kraft paper to achieve the insulation effect.
2 Maximize the number of hours of illumination
First, remove the cover in time after sunrise, and cover the curtain in time, and cover the cover. Secondly, it is necessary to keep the shed film clean, often clean the shed film, enhance the light transmission performance, and improve the heat storage capacity of the greenhouse. In the case of snowy days when the shed surface does not freeze, the cover should be removed in time.
3 strict regulation of fertilizer and water management
In the warm room, the fertilizer should not be carried out in the snowy days. It is best to follow the weather forecast. After the cloudy and snowy days, the third day of the sunny day will be followed by topdressing and watering. The irrigation should be light and should not be heavy, avoid flooding; continuous cloudy days When it is really necessary to fill the water, it should be under the film, or the warm water (the warm water in the cistern storage tank), so as not to reduce the ground temperature, increase the humidity, and cause adverse effects.
4 Take emergency warming measures
Before the cold current arrives, the reflective curtain can be hanged, that is, the silver plastic cloth is hung on the back wall of the shed. Low-profile vegetables, small sheds in the shed to keep warm. Set up a temporary stove, but pay attention to smoke, to prevent smoke. An additional light bulb is added every 10 square meters for temporary warming. In the case of less severe cooling, a candle can be ignited every 1 meter in the front foot of the shed, but fire protection should be noted. The use of greenhouse warming fuel can increase the temperature of the greenhouse by 4-6 °C for 4-5 hours, and increase the concentration of carbon dioxide in the greenhouse, which is beneficial to increase the yield and deal with the freezing damage caused by severe low temperature, but it should be noted when using. The warming block is raised more than 15 cm above the ground to make it fully burned to reduce smoke and cause smoke damage.
Cover the snow-proof polypropylene shed to prevent snow and increase temperature. In the “four in one†solar greenhouse, a biogas lamp is placed every 10 square meters, or a biogas stove is placed every 50 square meters, and the biogas lamp is ignited from 5:30 to 7:30 in the morning, or cooked on the biogas stove. Boiling water, using steam to heat, for 2 hours, not only to increase the temperature, but also to increase the application of carbon dioxide gas fertilizer, played a role in preventing cold and increasing production.
The above are four solar greenhouse anti-cold damage, freezing damage technical measures, please friends as needed. Welcome everyone to continue to pay attention to Hui Nong Network!
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