“Each year in the cold winter and spring seasons, the vegetables growing on the front face of the greenhouse are generally poor and are more susceptible to disease and cold. Is there a good solution?†Recently, a vegetable farmer called an urgent request for help.
The space on the front face of the greenhouse is small, the heat dissipation area is large, and the temperature is reduced. In particular, when the shutter is used, the overall rolling of the rolling machine is inconsistent, the height of the lower end is not uniform after the straw curtain is laid or the insulation is warmed, and the area is not covered in some places. , will lead to lower temperature at the front face. And the water inside the film drops on the front face, causing excessive humidity. Such intense temperature and high humidity conditions often lead to abnormal growth of vegetables on the front face and reduced yields. I visited and found that many vegetable farmers in the greenhouse before the insulation on the way to think of a lot of ways, the effect is good.
Inside the front face of the greenhouse with two membranes
The two membranes on the inner side of the front face can reduce the heat loss, increase the temperature in the shed, and also help isolate the wet soil on the front face, reduce the humidity on the front face of the shed, and reduce the occurrence of diseases. The two membranes can be used without drop film, less dew, good insulation. You can also use the mulch, the most economical. When the two membranes are installed, the two membranes cannot be tightly attached to the outer shed membrane, and should be spaced 20-30 cm apart from the outer shed membrane, which is conducive to the increase of temperature and isolation of moisture. When the night temperature in the shed is between 16°C and 17°C, the two inner membranes can be set at half height of the front face, which can not only improve the daytime and nighttime temperatures, but also not affect the light transmission of the front face. When the night temperature in the shed is between 15°C and 16°C, the temperature at the front face will decrease to 12°C-13°C. At this time, the two membranes should be set at the same height as the front face to enhance the heat preservation.
Outside the front of the greenhouse, add non-woven or old straw
Outside the front of the greenhouse, non-woven fabrics or old straw curtains are added. It is like putting an apron on the greenhouse. The layer of non-woven cloth or old straw curtain covered by the shed is covered under insulation, which can greatly enhance the insulation effect on the front face of the greenhouse. The softness of the non-woven fabric is higher than that of the front face when it is used. The non-woven fabric is first placed on the lamination film, and the insulation is then put down. With the old straw curtain, the height of the old straw curtain should be lower than the height of the front face of the shed, and the height of the front face should be set to more than half, so that when the shutter reaches the front face, the height difference from the ground is lower. Big, shutter irons will soon land on the bottom of the front face. If the height is the same as the front face, it is easy to overwhelm or hold up the old straw screen, which does not provide insulation. The main purpose of covering the non-woven fabric or old grass curtain on the front face of the greenhouse is to strengthen the heat preservation at night, so after the shed is opened the next day, it should be removed timely to facilitate the light transmission at the front face and avoid the front face. Vegetables cause shading.
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