What lights are used to promote plant growth in vegetable greenhouses at night

Plant grow lamp mainly refers to "high gloss sodium lamp", which is mainly used in plant cultivation greenhouses to provide light for plant growth that is insufficient for ordinary sunlight. The plant is in a stable growth environment for a long time, not affected by the external natural climate, and the healthy plant growth also brings great convenience to the cultivators. The high luminous sodium lamp continuously provides a very high luminous flux for plant growth through its own luminous body, and it is designed to imitate the spectrum and luminous flux of daylight to make its performance similar to that of daylight, so as to prevent the continuous creation of a harmonious world for plants without ordinary light.

Successful cases: Institute of Botany, Chinese Academy of Agricultural Sciences, Jilin Provincial Institute of Vegetable and Flower Science, etc.

Grow lights are used for the following purposes:

As a supplemental light, light can be enhanced at any time of the day in order to always help the plants with photosynthesis. Especially during the winter months, it is possible to extend the effective lighting time.

Whether at dusk or at night, it can effectively extend and scientifically control the light required by plants, without being affected by any environmental changes.

In greenhouses or botanical laboratories, natural light can be completely replaced to promote plant growth.

High luminous sodium lamp characteristics:

The arc tube is filled with a sodium lamp with the highest efficiency of high-pressure hernia.

GE's patented technology - external sodium amalgam storage tank.

20% increase in light efficiency to 150 lumens watts.

Lumens maintain up to 90%.

The average life span can reach 28,500 hours.

In addition, high-pressure sodium lamps and ordinary fluorescent lamps can also be used for supplementary lighting.

The reason why vegetables appear green is because green light is the most "hated" light of plants, and all green light is returned. Therefore, it is best to use red lights to illuminate at night, which can increase yields, and green complementary light can be used anyway, which can prolong the photosynthetic time of plants.

With iodine-tungsten lamps and sodium lamps! In order to prolong the light, you can increase it to about 10 o'clock in the evening, if it is too late, it will affect the respiration of vegetables!

An ordinary 1000W lamp will do. One meter is one for 2 rooms.

1.Plants need light to grow for photosynthesis, but not all light is needed by plants, and different plants need different light ratios to grow, so different wavelengths of light have different effects on plant photosynthesis.

blue) and 610-720 (red) contribute the most to photosynthesis. Blue light promotes the growth of plants, while red light causes plants to blossom and bear fruit. The red and blue combination of the plant lights is pink.

3.If the greenhouse vegetables need to use the fill light, it is recommended to use the red and blue color fill light, and the red and blue LED ratio is generally 4:1-9:

1 is appropriate, usually 6-9:1 can be selected. Weizhaoye Optoelectronics has done a good job in customizing the red and blue ratio of plant lights, and the light ratio required for the growth of different plants is different, such as stem and leaf plants need a little more blue light, and flower and fruit plants need a little more red light.

If you use white fill light for greenhouse vegetables, you can make your vegetables more shiny and bright, and I think white ones are good.

It is recommended to use red and blue color fill lights, the ratio of red and blue LEDs is generally between 4:1-9:1, and 6-9:1 is usually optional.

It can supplement light in winter and rainy days to promote plant photosynthesis and increase yield. In addition, for long-day plants, extending the light hours can also promote flowering.

The role of LED grow lights on the planting of greenhouses: the use of LED grow lights in greenhouses has a very significant effect, and the plant growth rate is nearly 3 times faster than that of ordinary naturally grown plants. LED plant lights are generally hung at a height of about 1 meter from the leaves, and continuous irradiation for 12-16 hours a day can completely replace sunlight.

In the winter when there is often no sunlight, the use of LED plant lamps and greenhouses can grow green vegetables, which can improve the sweetness of vegetables and fruits and reduce pests and diseases, and increase, increasing the yield by 3 to 5 percent.

LED grow light is a kind of lamp that uses the principle of sunlight to simulate the light environment required for plant growth. Plant growth needs light for photosynthesis, but not all light is needed by plants, using fluorescent lamps to plant plants, you will find that plant growth is not ideal or even withered, this is because different wavelengths of light have different effects on plant photosynthesis, plant photosynthesis needs light, wavelength is about 400-700nm. Light from 400 to 500 nm (blue) and 610 to 720 nm (red) contribute the most to photosynthesis.

The wavelength of the fluorescent lamp is about 1000nm (white light) or more, and without the light required by plants, photosynthesis cannot be carried out normally, and plants naturally cannot grow and develop normally.

The blue (470nm) and red (630nm) LED grow lights can just provide the light that the plants need. Blue light helps plant photosynthesis to promote green leaf growth, protein synthesis, and fruit formation; Red light can promote the growth of plant rhizomes, help flowering and fruiting, prolong the flowering period, and play a role in increasing yield. Therefore, it is ideal to use both color combinations.

Visually, the red and blue combination of the plant lights is pink. The ratio of red and blue LEDs of LED grow lights is generally 4:1-9:

1 is appropriate, usually 6-9:1 can be selected. Different plants need different light ratios to grow, for example, stem and leaf plants need a little more blue light, and flower and fruit plants need a little more red light.

The growth of plants is inseparable from light, and the light utilization rate in the shed is reduced due to construction and other reasons, and the light utilization rate in the shed cannot be met.

LED plant light can fill light for plants, which can not only meet the needs of plants for photosynthesis, but also promote plant yield increase, early market, and increase quality.

Blue light promotes the growth of vegetable leaves; Red light promotes flowering and fruiting.

In the low temperature and photographic environment of winter, the focus of greenhouse vegetable planting management is temperature regulation, humidity regulation, fertilizer control, pest and disease prevention and extreme weather damage. Two of the most important are the temperature and humidity management that has the greatest impact on greenhouse vegetable growth and yield. Let's tell you about it in turn.

In winter, the vegetables in the plastic greenhouse grow well, grow strong, and the yield is high, and the thermal insulation and cold management in the warehouse is the top priority. After entering the winter, the outside temperature is low, the temperature in the warehouse is high, and the temperature difference between day and night is large. In the management of winter housing warming and cold protection, the following measures can be taken to raise the temperature of the warehouse and prevent vegetables in the East China Sea:

The vegetables in the warehouse are planted with furrows, which can receive more light during the day and absorb more air heat, which contributes to the rapid warming of the warehouse. After the vegetables are officially eaten, the warehouse is filled in a timely manner according to climate change and crop growth. When filling the warehouse, it is necessary not only to choose materials with strong light transmission and warmth, but also to cover the membrane firmly (taking care to prevent water leakage everywhere), and to frequently clean the rain and blind spots of the membrane (which will increase the light temperature in the warehouse).

Mulching film can not only effectively raise the soil in the warehouse by 2 3 degrees, but also reduce the evaporation of water in the soil and the number of watering times (frequent watering can reduce the soil temperature), and also prevent the humidity in the warehouse from being too high and causing diseases to the crops. A plastic greenhouse without mulch film can spray a few centimeters of straw or rotten organic fertilizer between the vegetables in the shed, and the insulation effect is very good.

In winter, the surface soil in the warehouse is prone to cracks, which will reduce the thermal insulation performance of the soil, so shallow tillage can be carried out when ventilating every day, which has a good thermal insulation protection effect. Before the arrival of the cold snap, you can thickly cover the greenhouse or multi-layer covering, or add medium film and small synovial film in the warehouse, or temporarily add electric stoves, fill lights, smoke, etc., to keep warm and prevent cold. Low temperatures and **, i.e. low temperatures and less light, can have a very detrimental effect on greenhouse planting, crop plants wilt, and even dead seedlings will appear.

In the case of low light in the greenhouse, crops cannot photosynthesize normally, so crop water evaporation also decreases during the same period, growth stagnates, and the demand for nutrients also decreases year-on-year. Don't use too much fertilizer at this time, and watering should be under control. If it's not too dry, you can pause the use of water.

Otherwise, the humidity in the greenhouse is too high, and chemical fertilizers may be applied when the temperature of the crop is low. In particular, chemical fertilizers such as ether and nitrogen compounds are applied. It also has the effect of reducing the temperature in the warehouse, and it will also affect the normal development of crop roots, so it should be avoided.

At this time, the use of lighting and reflector measures can enhance the lighting and ensure the growth needs of the crop. For the phenomenon that the crop has withered, it can be sprinkled with water on the foliage**, and at the same time, through separate irrigation treatment, the symptoms of continuous wilting of the crop can be reduced, and the root growth can also be promoted by increasing the soil of the crop roots.

1. Do a good job of supplementing light and heat preservation preparations: Before snowfall, you should prepare straw, quilts and other thermal insulation items and temporary auxiliary heating and lighting items such as stoves and lights, so that when the temperature in the greenhouse drops to the temperature and light required for vegetable production, plant lamp manufacturers can take warming, heat preservation and lighting measures in time.

2. Reasonable application of mulch: When it snows during the day, we should try to uncover the grass and other mulches, which is conducive to the use of scattered light to maintain the temperature and photosynthesis in the shed, and can also remove the snow on the shed in time. When it snows at night, cover the blanket with a layer of plastic film on top of the covering, such as quilts and straw, which not only makes it easy to remove the snow, but also prevents the greenhouse covering from getting wet.

Whether it is planting nightshade vegetables, melons or leafy vegetables, the management of this period is very important, on the one hand, to increase the temperature in the shed, and on the other hand, to supplement the light, so as to ensure the growth of vegetables. In addition to warming measures, the use of fill lights is also an effective way to reduce the impact of weather on vegetables. So, how to use fill lights more effectively?

1. The choice of fill light The type of fill light is different, and the effect is different. For example, fluorescent lamps or tungsten lamps commonly used by many farmers. In addition, we now use spectral fill lights, which are mainly blue and red light, simulating sunlight for plants to absorb.

The wavelength of light released by this kind of fill light is also relatively sufficient for the amount absorbed by the crop. The advantage of fluorescent lamps is that they are relatively cheap to use. Farmers can choose according to their crop growth needs.

Generally speaking, the luminous efficiency of low-pressure sodium lamps is the highest, followed by high-pressure sodium lamps and fluorescent lamps, and the luminous efficiency of incandescent lamps is the lowest. Energy-saving lamps do not play the role of supplemental light.

Shouguang Huikong Agriculture will answer for you.

Energy-saving lamps have a very weak or even no effect on plant supplemental light, and try to choose plant supplemental lights to increase plant income and yield.