Vegetable greenhouses can increase light

First, the layout inside the greenhouse should be reasonable. When planting different types of vegetables in the greenhouse, the principle of high in the north and low in the south should be followed to make the plant heights staggered and orderly, and to minimize mutual obstruction. The same kind of vegetables are transplanted, and the seedlings are of the same size, so that the plants grow neatly and the shading between the plants is reduced. At the same time, it is better to do sedge colonization in the north-south direction so that it can receive as much sunlight as possible. At the same time, do a good job in plant arrangement, timely pruning, pruning, bundling, and old leaves, etc., which is conducive to ventilation and light transmission in the shed.

The second is the use of non-drip films. Several drops of active agents are added to the formulation of the dropless film, which greatly weakens the affinity between water molecules and the film, and water droplets flow into the ground along the film surface without water droplets. The use of non-drip film buckle shed can increase the light intensity in the shed and increase the shed temperature.

The third is to keep the shed film clean. Dirt and other debris on the film will reduce the light transmittance by about 30%. Therefore, the dust and dirt on the shed surface should be cleaned frequently to increase the transparency of the shed film.

The fourth is to reasonably cover the straw curtain. On the premise of doing a good job in heat preservation, removing the straw curtain and delayed cover for heat insulation as early as possible can extend the light time and increase the amount of light. Generally, the curtain is opened 0.5 to 1 hour after the sun comes out, and the curtain is covered half an hour before the sun sets. Especially in the rainy days when the rain stops, it is also necessary to unveil the curtain properly to make full use of the sun's scattered light.

The fifth is to set up a reflective screen. Hanging an aluminum-coated reflective screen with a width of 2 meters and a length of 3 meters on the north side of the greenhouse to make it vertical, can increase the ground by about 40%, and increase the temperature of the greenhouse by 3 ° C to 4 ° C. In addition, laying silver-gray film on the ground can also increase the light intensity between plants.

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