Winter is the most important period for the production of vegetable greenhouses. Low temperature and ignorance in winter have the most obvious impact on the production efficiency of vegetable greenhouses. However, because of the low temperature in winter and the frequent occurrence of natural disasters such as ice, snow and frost, it will affect the vegetable greenhouses. The crops inside cause adverse effects.
Most parts of the north are located in a temperate monsoon climate. In winter and spring, affected by the southward movement of cold air from Siberia, rain and snow sometimes form due to the convergence of cold and warm air. 1-3 days with low temperature and little light, 7-8 days or even cloudy days with little light. Due to the promotion of market demand, greenhouse planting began to appear in large numbers, but only to solve the problem of planting environment. However, there is still insufficient sunshine. When the light intensity is lower than its compensation point, the organic matter consumption is greater than the accumulation, and the dry weight of the plant decreases. The growth of the plant is also weak. Therefore, it is necessary to use LED plant growth lights to fill light.
Therefore, in the cold winter, how to use full-spectrum LED grow lights to increase temperature, heat preservation and supplement light has become an important skill to ensure high-quality and efficient vegetable greenhouses.
LED grow lights provide a reasonable light environment for greenhouse plants, promote the growth and development of plants, and have certain requirements for light quality and intensity. LED plant growth lamp is an artificial light source used for plant photosynthesis growth system to meet the light conditions of photosynthesis. Yaorong's fifth generation of LED grow lights in Shenzhen, Guangdong! In the lack of sunlight, this kind of lamp can play the role of sunlight, so that plants can grow and develop normally or better.
Requirements for illumination of LED grow lights at night:
When using LED grow lights to fill light, it is recommended to use light wave lengths between 400-460nm and 600-660nm in the field of horticulture production. This spectral wavelength can give plants better growth and is the most needed spectral stage.
The temperature requirements of LED grow lights for supplementing light at night:
Melons, solanaceous fruits and vegetables require a minimum temperature of 13 degrees Celsius or more, and the growth will stop if the temperature is below 10 degrees Celsius. Therefore, general vegetables should be kept warm at night to prevent them from being damaged by freezing, so that the plants can grow at night. They will basically not grow below 10°C. Therefore, the temperature of the greenhouse at night cannot be lower than 10°C, which happens to be the LED grow light. Dissipate a small amount of heat to maintain the balance of indoor temperature.
The distance requirements for LED grow lights to fill light at night：
LED grow lights will generate a certain amount of heat. If they get too close, they will burn the plants and cause some damage to the plants. If the distance between the LED grow light and the plant is too far, it will greatly reduce the light utilization rate, thereby weakening the light supplement effect. If the heat of LED grow lights is less than other grow lights, but there will be a certain amount of heat. If the distance is too far, it will also affect the effect of fill light.
The time requirements of LED grow lights to fill light at night：
If the weather is fine, the plants can fill up the light for 2-3 hours in the morning and evening when the light is weak. If it is cloudy, rainy or hazy, plants can fill up the light all day. There is a time limit for plants to supplement light. Plants have 14 hours of supplementary light a day, which is a very suitable time. They also need to rest at night and have time to breathe.
Tips for supplementing light at night in LED grow light greenhouses:
(1) Different types of plants are planted reasonably and arranged in accordance with natural rules. For example, plant plants in the northern hemisphere. It is best to follow the principle of high in the north and low in the south, so that all plants can be evenly illuminated, and try not to shade between plants;
(2) At the same time, reflective measures can be taken in the greenhouse to improve the effective utilization of light. When erecting the frame, use reflective materials. In addition, all the brackets do not need to be upright at 90 degrees. Keep the middle brackets upright, and the north and south brackets are slightly Tilt, this can increase the light utilization rate by 5--10%, and it can be reused by plants.
(3) Cleaning the roof of greenhouse planting regularly clean up "roof garbage", otherwise the transparency is not enough, it will have a great impact on the light and temperature in the shed, which will affect the photosynthesis and respiration of plants, and ultimately affect the yield and quality of plants .
(4) Reflective measures can be taken around the greenhouse, which can reflect a large part of the scattered light back and be reused by plants;
(5) Using LED grow lights to fill light, on the one hand, the light distance can be appropriately shortened. Generally, when buying LED grow lights, they will be purchased according to the installation area and the irradiated area of the LED grow lights. The irradiated area can be appropriately shortened to increase plants in a reasonable range. Fill light.
LED grow light greenhouse planting advantages
High light efficiency and energy saving: The electro-optical conversion efficiency of LED grow lamps is more than 20 times that of incandescent lamps, 3 times that of fluorescent lamps, and nearly 2 times that of high-pressure sodium lamps. The application of LED grow lights can greatly reduce power consumption, thereby achieving energy saving.
Spectrum customization: LED grow lights can cover dozens of monochromatic lights with wavelengths. And can realize monochromatic light composite spectrum or full-spectrum white light through monochromatic light excitation phosphor powder, and realize the spectrum customization of different plants.
Adjustable spectrum: The function of adjusting the spectrum can be realized by separately controlling the current size of LED grow lights with different light colors. At present, the adjustable spectrum plant lights on the market are mainly used for scientific research, and the plant lights with adjustable light intensity have been widely used in production.
Less fever: It can be close to the plants without causing problems such as plant leaves and burning by the operator. Thanks to the low heat generated by LED grow lights.
Long lifespan: The theoretical lifespan of LED grow lights is more than 100,000 hours. Subtracting the influence of various factors, the lifespan of the LED grow light can be left with 50,000 hours. Compared with traditional plant lights, the light decay of LED grow lights after 36,000 hours of operation is still less than 10%. The fluorescent lamp usually has a light decay as high as 30% after 10,000 to 15,000 hours of operation.
Safer and more environmentally friendly: Compared with other traditional plant lights, LED grow lights have no mercury or other polluting elements, and are more energy-saving in terms of power saving. The power supply adopts waterproof male and female plug connections, and has the advantages of IP65 waterproof rating.
Greenhouse planting is to meet the needs of plant growth on the environment and various nutritional positions. This must be established under the condition of sufficient light. You only need LED grow lights to solve the problem of greenhouse planting, and give plants healthy growth and growth. Good, to meet the normal growth needs of plants.
