In winter, the vegetables on the front face of the greenhouse showed poor growth and development, and the author adopted the “one diaphragm, one membrane and one ditch†insulation measures in front of the greenhouse to better solve this problem.
"One-hit" means that before the shed is put in the afternoon, it is covered with a grasshopper on the film before the shed, and then put on the shed. As a result, the front of the shed is equivalent to an additional layer of insulation material. At night, it can effectively reduce heat loss and increase the temperature there. After pulling the shed in the morning, the grasshoppers on the film before the shed should not be eagerly removed first, because withdrawing it will lead to continued cooling. Therefore, it is recommended that after the shed is pulled for another hour, the temperature will gradually rise and then it will be withdrawn. Grasshoppers are not late.
"A film" refers to the placement of a film on the inside of the front face of a greenhouse with a white mulch, and maintains a spacing of about 20 centimeters from the shed film. This also serves to strengthen the insulation at the place and reduce heat loss. In addition, in addition to the thermal insulation effect of the second membrane, it can also block moisture, prevent the water droplets dripping from the shed film from evaporating again into the shed, reduce the humidity in the shed, and control diseases such as gray mold and downy mildew. Have a positive effect.
"One ditch" refers to installing a cold-proof ditch outside the shed. The specific method is to dig a width of 35 cm deep and a depth of 50 cm deep from the outside of the front face of the greenhouse, and fill 10 cm thick corn stalks in the trenches in three layers, each filled with a layer of clay straw. . By digging the cold-proof ditch, the heat exchange at the front face of the greenhouse can be effectively blocked, so as to achieve the effect of heat preservation.
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White Willow,The stem bark of white willow is 10-12 meters high. It can be harvested all year round and used for bark. It is cultivated all over china. Mainly distributed in the yangtze river basin and south china. It can dispel wind and dampness, disinfect swelling and pain, and has antipyretic effect.
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