How to set the arch shed film
For autumn stubble arch sheds that mainly grow peppers and eggplants, when the minimum outside temperature drops to 10 ℃, two membranes should be installed to enhance the heat preservation of the shed. When the lowest temperature in the shed drops to 8°C, three membranes can be added on the hanging vine steel wire to further improve the thermal insulation. As the temperature continues to drop and the growth of vegetables stagnates, vegetable farmers can untie the hanging vine ropes, close the plants, and then directly cover the plants with a film to ensure that the existing vegetables on the plants are not damaged by freezing and extend the storage time to sell them. Better price.
For the arched shed for planting chrysanthemum chrysanthemum and other vegetables, the setting of two membranes and three membranes can be the same as that of spring vegetables. The four-membrane small arch canopy can be selected according to the width of the border to support the small arch canopy.
Three layers of membranes are set on the arch frame. One membrane refers to the exposed greenhouse film; the second membrane can be 20-30 cm away from the bottom of the canopy, and the bamboo poles and iron wires are erected according to the arc of the arch by the columns, and then set on the bamboo poles and iron wires. The film is covered with soil at the bottom of both sides, and the joints of each film are overlapped by about 10 cm, clamped and sealed with iron clips; the third film is under the second film, and the installation measures can be the same as the second film, and the distance from the second film Can be increased appropriately. The first film, second film and third film require not only good light transmission, but also good anti-fogging and dripping properties, so as not to have the opposite effect due to dripping and fogging.
A small arch can be supported in the arch shed, which is covered with a film after inserting arches of different lengths. If it is covered with 7 membranes, 3 small arch sheds should be installed from the outside to the inside, and the lengths of the bamboo splits used are 4 meters, 3 meters, and 2 meters in turn; while some vegetable farmers choose 6 membrane coverage, only 2 small arch sheds are added. Yes, the length of the bamboo split used is 4 meters and 2.5 meters.
The layer of mulch covering the ground is the seventh layer. The seventh film is the one closest to the vegetables, and its quality has a great influence on heat preservation. It is necessary to choose a mulch film with consistent transparency, smooth and bright appearance, uniform thickness, and good horizontal and vertical tensile force for coverage. Do not use low-quality mulch, otherwise the harmful gases released by the mulch may cause gas damage.
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