Reasonable layout. When planting vegetables in greenhouses, the principle of “Northern High and Low South†should be followed to make the plants tall and orderly, and to minimize mutual occlusion. The same kind of vegetables are transplanted, and the size of the seedlings is consistent, and the shading between the plants is reduced. At the same time, it is better to do the planting in the north and south, so as to accept the sun as much as possible.
Keep the shed film clean. Water droplets, dust and other debris on the shed film will reduce the light transmittance by about 30%. After 2 days, 10 days, and 15 days of use, the light in the shed will be reduced by 14%, 25%, and 28%. Therefore, it is necessary to clean and rinse the shed frequently to increase the transparency.
Reasonably uncover the straw curtain. Under the premise of doing the insulation work, the straw curtain and the delay curtain for heat preservation can be removed early, which can prolong the illumination time and increase the amount of light. Generally, the sun is released 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 necessary to properly uncover the curtains to make full use of the scattered light of the sun.
Use a drop-free film. The drop-free film incorporates several surfactants into the formulation, so that the affinity between the water molecules and the film is greatly reduced, and the water droplets flow into the ground along the film surface without water droplets. The use of a drop-free film shed can increase the light intensity in the shed and increase the temperature of the shed.
Set up the reflective screen. Hanging the aluminized film reflective curtain 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 shed by 3 °C to 4 °C. In addition, laying a silver-gray mulch on the ground can also increase the light intensity between plants.
Organize the plants. Timely management of pruning, snoring, tying vines, and old leaves is conducive to ventilation and light transmission in the shed.
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