The methods to improve the lighting rate of vegetable greenhouses mainly include the following:

Reasonable layout: When planting different types of vegetables in the greenhouse, the principle of "high in the north and low in the south" should be followed, so that the height of the plants is staggered and orderly, and the phenomenon of mutual obstruction should be minimized as much as possible. When transplanting the same vegetable, strive for consistent seedling size and reduce shading between plants.

Keep the greenhouse film clean: Water droplets, dust, and other debris on the greenhouse film will significantly reduce the light transmittance. Therefore, regularly cleaning and rinsing the dust, dirt, and water droplets on the greenhouse surface to keep the membrane surface clean can increase the transparency of the greenhouse membrane.

Selection of Drip Free Film: Drip free film incorporates several surfactants into the production formula to weaken the affinity between water molecules and the film. Water droplets flow into the ground along the film surface without producing any droplets, thereby increasing the light intensity and temperature inside the greenhouse.

Setting up a reflective screen: Hanging an aluminum coated reflective screen on the north side of the greenhouse can increase the brightness of the ground by about 40% and raise the greenhouse temperature by 3-4 ℃. In addition, laying silver gray plastic film can also increase the light intensity between plants.

Optimizing greenhouse structure: Appropriately raising the height of the greenhouse, using No. 8 galvanized iron wire to tighten the greenhouse surface, and using polyethylene film and other measures can effectively improve the lighting rate. In addition, adjust the orientation and angle of the greenhouse according to the usage time and crop needs. For example, in spring and autumn, the angle of the greenhouse surface should be smaller, while in winter, a larger angle should be set and arch design should be adopted.

Strengthen cultivation management: Timely carry out field management such as pruning, branching, tying vines, and pruning old leaves, which is beneficial for ventilation and light transmission in the greenhouse.

Using greenhouse lighting: In cloudy or low light conditions, greenhouse lighting can be used to supplement the illumination and ensure that plants receive sufficient light.