Method for increasing temperature of benzene board in greenhouse

The greenhouse vegetable production in winter was affected by the sudden drop of outside air temperature or wind and snow weather, and the ground temperature and room temperature decreased, and vegetables were often frozen and harmed. Conventional heating methods (stove, liquefied gas cylinders, etc.) can only increase the indoor air temperature and the ground temperature rise is not significant. For this reason, the author conducted a trial of the benzene board for full greenhouse warming and received good results. First, the new greenhouse foundation, wall, sloping benzene board placement method 1. Basic benzene board placement according to the greenhouse design specifications after the line excavation foundation, deeper than the frozen layer, width than the design wall width of 20 cm. Determine the height of the benzene board according to the basic depth, place the benzene board upright on the inside of the foundation, and keep the gravity perpendicular to the soil. Then fill the ground with the sand and pour it with water. 2. The thickness of the wall of the benzene board placed brick-concrete structure is 12 cm + benzene plate thickness + gray mouth + 24 cm, benzene board is placed between 12 cm and 24 cm, 12 cm is inside, the wall is laid Water scum sand, to maintain the basic benzene board is not oppressed by the wall weight. The two walls sandwiching the benzene board are fastened to the wall height with iron reinforcement every 50 cm. 3. Post-slope benzene board is placed on the top of the greenhouse and is the top of the road. Because the strength of benzene board itself can not be placed outside the top of the slope, can only be placed on the inside. So take a solution from the inside of the hanging shed, which can be nailed to the side slope beam on the back side of the slope, and the benzene board is stitched with white ash and water to add “107 glue”. Second, the old greenhouse base, wall benzene board placement method 1. Basic benzene board placed in the greenhouse from the foundation about 25 cm excavation, width enough to work properly. After the frozen layer is over, the benzene board is placed vertically on the side of the wall and filled with water for compaction. 2. The sloping benzene board placed on the back wall shall be placed in the way of erecting the rear slope of the new greenhouse. Third, the insulation effect 1. The ground temperature through the benzene plate of the greenhouse and the benzene plate is not set the greenhouse contrast test, the result is the former than the latter in the evening high temperature 6 °C -8 °C, during the day 4 °C -5 °C. 2. The temperature of the former is 4°C-6°C higher than the latter in the evening and 3°C-5°C higher during the day. The experiment shows that this method is simple, the source of the material is easy to obtain, the effect of heat preservation is good, and the occurrence of cold injury of vegetables is reduced. At the same time, the type of planting has been expanded and improved.

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