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Led plant growth lamp boosts greenhouse plant growth
- Aug 27, 2018 -

Recently, European horticultural workers have experimented with the application of winter greenhouses for LED plant growth lamps for horticultural applications. The results are gratifying, allowing growers to harvest raspberries in January (also called raspberries or raspberries). . The test was conducted in the Netherlands. Willemvan Eldik, a member of the Dutch research group Delphy, said the crop was sown in November, and with the mixture of red and blue LEDs, the large leaves grew "as fast as summer."

Van Eldrik said that Bud quickly grew and quickly produced nectar. The bumblebee and the bee pollinated and picked the fruit on January 31 this year.

The trial used the summer variety Tulameen (rubusidaeus) in a climate controlled greenhouse.

At the same time, the experiment of planting blackberries was carried out. Starting from November 20 last year, flower buds were grown in January this year, and pollination was carried out by bumblebees and bees, and fruits were harvested in February.

Researchers hope that the study will help Dutch growers achieve year-round production.

The potential of LED plant growth lamps has caused great concern in the field of horticulture. Unlike traditional high-pressure sodium lamps, LED plant growth lamps can be dimmed according to various crops, the so-called "light formula."

Each plant requires different illumination at different times of the day and at different times of growth. Most growers currently mix 450 nm wavelength blue light (which contributes to the production of chlorophyll and beta-carotene) and 660 nm red light (which affects germination, plant growth, leaf growth and flowering).

More red light usually increases crop yield linearly. Lighting can also be dimmed, affecting the shape, taste and other characteristics of the plant.


Led plant growth lamp in greenhouse application

In the use of LED plant lights, the effect is very significant, the plant grows almost three times faster than the plants that grow naturally. LED plant lights are generally suspended from the blade at a height of about 0.5 to 1 meter. Continuous illumination for 12-16 hours per day can completely replace sunlight. In the winter when there is often no sunlight, LED plant lights can be used to grow green vegetables, which can increase the sweetness of fruits and vegetables, reduce pests and diseases, and increase the yield by 3 to 50%.

Everything grows by the sun, and light is one of the important physical environmental factors that are indispensable for plant growth and development. LED plant growth lamps are mainly red and blue light, which just provide the light needed by plants. In the Netherlands, there has been a 1% increase in light, which can increase the yield by 1%. LED plant growth lamps can effectively control the intensity and length of light, and more photos on cloudy days and less photos on sunny days, maximizing photosynthesis of plants and shortening the growth cycle. At present, most of the colored peppers have just entered the fruiting period and are growing well.

It is the use of the principle of sunlight to simulate a luminaire suitable for plant growth. Plant growth requires light, but not all light is needed by plants. Plants used to grow plants may find plants not growing ideally or even withered because different wavelengths of light have different effects on plants. The light required by plants has a wavelength of around 400 to 700 nm. Light from 400 to 500 nm (blue) and 610 to 720 nm (red) contribute the most to photosynthesis. However, the wavelength is about 1000 nm () or more, there is no light required by plants, and photosynthesis cannot be performed normally, and plants cannot naturally grow and develop normally.

Blue (470nm) and red (630nm) LED plant lights provide just the light that plants need. Blue light helps plant photosynthesis to promote green leaf growth and fruit formation; red light can promote plant roots growth, contribute to flowering results and prolong flowering, and increase yield. So the ideal choice is to use these two color combinations. In terms of visual effects, the red and blue combination of plant lights is pink. The ratio of red and blue LEDs of LED plant lights is generally between 4:1 and 9:1, usually 6:9:1. Different plants need different light ratios. For example, stem and leaf plants need more blue light, and flower and fruit plants need more red light.