Introduction of plant growth lamp
Selection of light sourcesWhen using artificial light sources, we have to select the closest natural light that satisfies the plant's photosynthetic conditions. The light source should have the following characteristics:1. efficient conversion of electric energy into radiant energy2. achieve high radiation intensity in the effective range of photosynthesis, especially low infrared radiation (heat radiation)3. the radiation spectrum of the bulb conforms to the physiological requirements of the plant, especially in the effective spectral region of photosynthesis.Compared with the intensity in the effective zone of photosynthesis, the energy conversion effect of sodium lamp is two times higher than that of mercury lamp in various artificial light sources with horizontal radiation. Sodium light is the most effective light source for greenhouse plants to affect photosynthesis and correct growth. The tubular lamp can achieve high efficiency radiation 150lm/w, is currently on the growth of various crops most favorable choice. Increasing the sodium vapor pressure in the ceramic arc tube can broaden the spectrum of blue and red light, which is a high range of wavelengths pursued. In high-pressure sodium lamps applied to horticultural products, we recommend PLANTASTAR (OSRAM), SON-T, AGRO (PHILIPS), LUCALOX, XO (GE). Their difference is to raise the higher 0-40% blue range and activate the chlorophyll of plants. To achieve maximum radioactivity, all sodium lamps are fitted with reflectors at the side of the lampshade. At present, the majority of factories in China generally use the sodium lamp as the street light, and use the sodium lamp on the spot. The export has caused a lot of losses to the customers.
The significance of interior lighting in GreenhouseWhat we need to know is that the growth rate of plants depends on the intensity of light, that is, the amount of radiant energy absorbed by the plant surface, not by the number of light sources. Many people ask, what is the meaning of greenhouse lighting, and how to choose which light source should be chosen?The significance of internal lighting in the greenhouse is to extend enough light intensity in a day. Mainly used in the late autumn and winter planting vegetables, chrysanthemum seedlings rose even. Greenhouse lighting has a great influence on the growth period and seedling quality. Usually, the tomatoes begin to shine after two leaves of the seedlings are grown, and 6-8 days of light lasts for 12 days to reduce the seedling preparation period. But more than 24 hours of light note is a plant growth disorder. The most suitable time of illumination is 8 hours per day. In cloudy and light days, artificial lighting is a must. Give at least 8 hours of light each day at least during the evening, and keep the light hours fixed every day. But lack of night rest also results in plant growth disorders and reduced production.For tomatoes, the most effective hours of illumination are from dusk to midnight, 16:00-24:00, or 24:00-8:00. from midnight to early morning, with 8 hours of light and 8 hours of rest. In practice, we should provide illumination for plants throughout the growing period, from seedling to colonization. In the end, we should reduce the amount of light to 6 hours a day, or even 2-3 days. If the light condition is bad, it will take a long time to reach the planting period, and usually the illumination will last for one month.
Now plants fill light on the market basically is three kinds: Agricultural lamp, LED, energy-saving lamp. Among them, the light efficiency and photosynthesis efficiency of agricultural sodium lamp are the highest. In the developed countries, 100% of the greenhouse use sodium lamp, the efficiency and the cost performance of sodium lamp are the highest. The efficiency of LED is lower than that of agricultural sodium lamp, but the price of each tile is about 10 times that of agricultural sodium lamp. The cost performance is poor. In addition the monochromatic light plant spindling, also known as jump seedlings, defects of monochromatic light itself, is unable to solve. The efficiency of energy-saving lamps is basically less than thirty percent of agricultural sodium lamp, waste of energy. Literally, the light energy saving lamp seems to be energy-saving, energy-saving lamps for incandescent lamps in fact just before it is energy saving, for plant lights, energy-saving lamp efficiency is the lowest. If you need the agricultural sodium lamp, you can use the Baidu plant light.
