In the winter and spring season, vegetables grown in plastic greenhouses often suffer from low light and low light barriers (abbreviated as “low light diseaseâ€). The general symptoms are: poor plant growth, thin stalks, and thin leaves and light colors. Yellowing; Poor flower bud differentiation, floral abnormalities, serious drop and fruit drop; fruit growth is slow, light color, astringent, coloring is bad. Low light disease has a certain influence on the yield and quality of vegetables. Preventive measures: mainly to improve lighting conditions in the shed as much as possible. When planting, increase the row spacing and reduce shading between plants. Keep the film clean to prevent water droplets and dust on the film surface. In the middle and later stages of vegetable growth, when the temperature outside the membrane reaches 15°C around noon, some of the shed films are properly opened so that the sunlight can be directly injected into the shed. According to another test, the use of polyester aluminized film spliced ​​into 2 meters wide, 3 meters long reflective screen, hanging in the plastic greenhouse (or greenhouse) after the upper end of the column, hanging down to the ground, the ground can add 40% to 43%, The greenhouse temperature is increased by 34 degrees Celsius, and the ground temperature is increased by 1.8 to 2.9 degrees Celsius, which can increase the yield of the tomato by 41.8% to 58.1% and improve the fruit quality. The laying of silver ash film or aluminum foil on the ground can also increase the light intensity between the plants, so that the fruit can be well colored, and can effectively prevent the premature decay of the lower leaves. Dental Nitrile Gloves,Nitrile Gloves Large,Eu Medical Dental Gloves,Gloves Nitrile Disposable Gloves Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshimedical.com