What is the Principle and Characteristics of LED plant growth lamp
The necessity of filling light in greenhouse
In recent years, with the accumulation of knowledge and technology and the increasing maturity, the plant growth lamp, which has been considered as a symbol of high-tech modern agriculture in China, has gradually entered people’s field of vision. With the gradual in-depth study of the spectrum, it was found that different bands of light have different effects on each growth stage of plants. The point of lighting inside the greenhouse is to extend enough light intensity throughout the day. It is mainly used to grow vegetables, roses and even chrysanthemum seedlings in late fall and winter.
On cloudy days with low light intensity, artificial lighting is a must. Give the crop at least eight hours of light a day at night, and the amount of light should be fixed each day. But a lack of nighttime rest can also lead to disrupted plant growth and reduced production. Under fixed environmental conditions such as carbon dioxide, water, nutrients and temperature and humidity, the size of the “photosynthetic luminous flux density PPFD” between the light saturation point and the light compensation point of a specific plant directly determines the relative growth rate of the plant, so the efficient combination of light source PPFD is the key to the production efficiency of the plant factory.
Fill light time arrangement
1, as a supplementary light, at any time of the day can enhance the light, can extend the effective lighting time 2, whether at dusk or at night, can effectively extend and scientific control the light required by the plant. 3, in the greenhouse or plant laboratory, it can completely replace natural light and promote plant growth. 4, completely solve the seedling stage to see the day to eat the situation, completely according to the seedling delivery time to reasonably arrange the time.
Selection of plant growth lights
Scientific choice of light source, in order to better grasp the speed and quality of plant growth. When using artificial light sources, we must choose the natural light that is closest to meeting the conditions of plant photosynthesis. Photosynthetic luminous flux Density (PPFD) produced by light source on plants is measured to master the rate of plant photosynthesis and the efficiency of light source. The light amount of photosynthetically active photons initiates plant photosynthesis in chloroplasts, including light reaction and subsequent dark reaction.
The plant growth lamp should have the following characteristics
1. Efficient conversion of electrical energy into radiant energy. 2. In the effective range of photosynthesis to achieve high radiation intensity, especially low infrared radiation (thermal radiation) 3. The radiation spectrum of the bulb meets the physiological requirements of the plant, especially in the effective spectral region of photosynthesis.
Plant fill light principle
LED plant light is a kind of plant light, light emitting diode (LED) as the light source, according to the law of plant growth, with light instead of sunlight to create a plant growth and development environment of a lamp. LED plant lights help shorten the growth cycle of plants, the light source is mainly composed of red and blue light sources, using the most sensitive light band of plants, red wavelength using 630nm and 640-660nm, blue wavelength using 450-460nm and 460-470nm. These light sources can allow plants to produce the best photosynthesis, so that plants get the best growth state. Light environment is one of the important physical environment factors for plant growth and development. Controlling plant morphogenesis through light quality regulation is an important technology in facility cultivation field.
