Plant growth lamp and spectrum introduction

- Mar 30, 2019-

Plant growth lamp and spectrum introduction

The plant growth lamp can be set according to the customer's demand and customized according to various plant growth conditions and needs. The plant lamp has a wide range of wavelengths and a large room for regulation. It can be adjusted according to various plant preferences through light adjustment. Plant light for lighting of various plants. Plant photosynthesis of light does not look at color temperature and lumens.

Blue light promotes green leaf growth; red light helps to flower and prolong flowering! Comparing the seedlings with 3 different illuminations, it was found that the seedlings illuminated with red LEDs grew the slowest and the smallest overall than the other two seedlings.

Seedlings illuminated with blue LEDs with fewer leaves and a slender overall shape. The seedlings illuminated with pink LEDs have larger leaves and a balanced growth of the plants as a whole. However, different types of plants, the wavelength of light that affects their growth, will vary somewhat. Therefore, in the future, it is necessary to carry out experiments including adjustment of irradiation time at agricultural test sites.

When the plant light is used to fill the plant, the height of the blade is generally about 0.5 meters, and the continuous sunlight for 10 hours can completely replace the sunlight. The effect is very remarkable, and the growth rate is nearly 3 times faster than that of natural plants. It solves the lack of sunshine in winter and promotes the chlorophyll, anthocyanin and carotene needed in plant photosynthesis, so that fruits and vegetables can be harvested 20% earlier. Increase, increase the yield of 3 to 5 percent, and increase the sweetness of fruits and vegetables.

Effects of spectral range on plant physiology 280 ~ 315nm –– > Little effect on morphology and physiological processes 315 ~ 400nm –> Less chlorophyll absorption, affecting photoperiod effect, preventing stem elongation 400 ~ 520nm (blue) –> chlorophyll The ratio of absorption to carotenoids is the highest, the effect on photosynthesis is 520 ~ 610nm (green) -> the absorption rate of pigment is not high 610 ~ 720nm (red) -> the absorption rate of chlorophyll is low, which has a significant effect on photosynthesis and photoperiod effect. 720 ~ 1000nm ––> low absorption rate, stimulate cell elongation, affect flowering and seed germination>1000nm ––>convert to heat. From the above data, different wavelengths of light have different effects on plant photosynthesis, plant photosynthesis The light required for the action has a wavelength of about 400 to 720 nm. Light from 400 to 520 nm (blue) and 610 to 720 nm (red) contribute the most to photosynthesis. Light from 520 to 610 nm (green) is absorbed by plant pigments at a very low rate.

According to the above principle, the plant lights are made into a combination of red and blue, all blue, and all red, to provide red and blue wavelengths of light, covering the wavelength range required for photosynthesis. In terms of visual effects, the red and blue combination of plant lights is pink. White LEDs, the most common ones, use blue LED dies to excite yellow phosphors, which in turn produce a visual white light effect. In the energy distribution, there are two peaks in the blue region of 445 nm and the yellow-green region of 550 nm. The 610 ~ 720nm red light required by plants is very scarce.

This explains why it is less favorable for plant growth under white LED illumination. The red-blue spectrum ratio of the plant lamp is generally between 5:1 and 10:1, and the ratio of 7 to 9:1 is usually selected. When a plant lamp is used to illuminate a plant, the height of the blade is generally about 0.3-0.5 m.