LED lighting customizes light recipes for plant growth
We all know that light is one of the standard conditions for plants to carry out photosynthesis, and it is also the standard for plant growth and results. The reason why the fruits in Xinjiang are so sweet is because the light conditions are good, which facilitates the accumulation of sugar. However, in the greenhouse, in addition to the influence of uncontrollable factors such as seasons and weather, due to the influence of the construction materials of the greenhouse, when the light required by the plants cannot be fully satisfied, LEDs are needed.
In fact, in popular terms, LED is a diode that emits light, and it is a "diode" with functions such as controllable brightness, adjustable color change, controllable switch, and controllable time! Compared with general incandescent lamps, metal lamps and fluorescent lamps, agricultural LED products have numerous advantages.
The first is its low power consumption. A study in Japan shows that replacing incandescent and fluorescent lamps with LEDs can save about 60 liters of electricity generated by mineral resources. Under the premise that the world's mineral resources are so tight, it is imperative to develop facility agriculture, and the use of LEDs can save a large part of agricultural production costs. Secondly, LED lamps can be said to be the most “green” light source supply except sunlight. The fluorescent lamps, high-pressure mercury lamps and high-pressure sodium lamps used in the earlier facility agriculture all contain non-degradable toxic substances, which will cause irreversible damage to the environment. However, LED lights do not contain toxic substances, are impact-resistant, recyclable, and have no impact on the environment, so they can be used in facility agriculture without any worries. At the same time, LED is a cold light source. The fill light has fast heat dissipation and can illuminate plants at a close distance. In the greenhouse where "an inch of land is an inch of gold", it can increase the planting space of crops, increase the yield of crops, and reduce the cost of cultivating crops. What everyone is most concerned about is that LED lights can promote the growth of crops, increase market share, and increase the income of growers. To put it simply, LED light irradiation can accelerate the photosynthesis of crops, promote growth, and make crops market earlier, seize market opportunities and gain more income.
People who have a certain understanding of plant growth know that the growth of crops mainly absorbs long-band red and orange light of 640nm-700nm and blue and violet light of 400nm-510nm, while LED lights can fully meet the light quality, light quantity, and even Both photoperiod and photoproduct values ??can be accurately calculated. In Shandong Shouguang vegetable planting base, LED lights are widely used. The crops illuminated by the LED lights have become lush and leafy, the plants are strong and the leaves are thick, and the fruits are more numerous, the color is more beautiful and uniform, the appearance and taste are better, not to mention the sales volume, and there are even "no" The "rumor" of "Shouguang Vegetables that can't be sold" shows that vegetables grown under LED lights are selling well. Not only vegetables grown under LED lights are impressive, but fruits and flowers are no exception.
Taking strawberries as an example, different light qualities have different effects on various parts of strawberries. Experiments have shown that under orange and red light, the photosynthesis and transpiration of strawberry leaves are increased respectively, which promotes the growth of strawberry seedlings; different light qualities have different effects on strawberry root vigor. Light energy can significantly improve the root vigor of strawberries. When the roots are active, the plants and seedlings can absorb more nutrients and grow better. Different light qualities also have different effects on strawberry fruits. The strawberry fruits under the irradiation of red and yellow light are fuller and taste better. Well, although strawberry fruits are small in blue light, there are a lot of them. Therefore, the rational use and combination of red, blue and yellow light can "do their best" and reasonably increase the yield of strawberry fruits. Seeing this, do you finally understand why the strawberry plantation is always illuminated with red, blue and yellow light?
Moreover, many teams on the market have increased their research on LED lights, striving to provide more scientific and effective facilities and convenient operating systems for modern agriculture. For example, Philips, which we are familiar with, has also started LED products. At the 2021 Asian Horticultural and Vegetable and Fruit Technology Expo, Philips' Green Power series LED top light modules have the advantages of increasing light, shortening the growth cycle, improving plant quality, and being relatively independent of light and heat. It has attracted wide attention from the exhibitors, and there is an endless stream of photos, inquiries and business negotiations.
It is believed that with the continuous progress of science and the continuous development of facility agriculture, not only will the proverb that "everything grows depends on the sun" be broken, but more "subversive" agricultural facilities will continue to emerge.