How to grow vegetables in a greenhouse in winter, how to supplement the light to receive the best ef

If you grow vegetables in winter, the weather will be cloudy and foggy, low temperature, and less lighting, and the growth momentum of vegetables will be very poor, and the growth will be slow, and it will be easy to get sick. In addition, when there is less light, the taste of some vegetables will also be affected, resulting in a decrease in sweetness. Continuous cloudy weather can directly affect the yield and quality of vegetables.

This is because fog can absorb blue color, which promotes chlorophyll synthesis, and the quality of light decreases, and vegetables do not absorb it, resulting in a slowdown in growth, etc., and absorbs light that is conducive to the growth of vegetables. At the same time, in the hazy weather for several days, a lot of dust has accumulated on the film, and the transmittance has decreased.

The management of this period is very important for the cultivation of tomatoes, vegetables, melons, leafy vegetables, etc., on the one hand, to increase the temperature in the warehouse, and on the other hand, to supplement the light to ensure the growth of vegetables. In addition to warming measures, if you want to reduce the impact of the weather on vegetables, using fill lights is also an effective way. So, how can you use fill lights to be more effective?

Different types of fill lights have different effects. For example, fluorescent lamps or tungsten filaments, which are commonly used in many farms. And now we're using a spectrum fill light.

The predominantly blue and red colors simulate sunlight so that plants can absorb it. The wavelength of light emitted by this kind of fill light and the absorption amount of crops are also relatively sufficient. The advantage of fluorescent lamps is that they are relatively inexpensive to use.

Farmers can choose according to their crop growth needs. For plants, plenty of light is needed to grow. In this way, they can grow better, because the leaves have to shine to make the nutrition better, so the lack of light will also make the growth momentum of the vegetables worse.

But in winter, in addition to the drop in temperature, the lighting is also drastically reduced. There are more cloudy days, and sometimes there are haze days, and the light is worse. In particular, some crops grown in plastic greenhouses are at a stage where the light is very low.

In addition to lighting time, lighting intensity is also important. Lack of light can lead to serious diseases, which must be artificially improved. For example, to supplement to meet the growth of crops.

So, how do you complement this light? I'm here today to tell a simple story. The lighting in the plastic greenhouse is already very weak, so pay more attention to whether there is anything blocking the light source.

Try to improve. Climbing crops are usually supported by bamboo poles, and ropes can be used to reduce the shade area. Originally, the base of the plastic greenhouse supported by bamboo poles can be replaced with iron wire, which can not only reduce the shading, but also make the plastic greenhouse into a card surface with better lighting.

Too much dust will affect the light transmittance of the greenhouse, so it is necessary to clean the pollutants on the greenhouse film in time, especially the snow after snowfall, to keep the film surface clean, and to ensure its lighting area in the morning and evening without affecting the light intensity. The deterioration of the greenhouse film will directly affect the intensity and light quality of light transmission, so it is necessary to choose high-quality film. Branches should be sorted out in time and old leaves should be removed.

Diseased leaves, dead leaves, improve the light conditions of vegetable greenhouses, and increase the yield of vegetables. Sowing is carried out reasonably in accordance with the principle of high in the north and low in the south, so that the seeds are arranged in the same direction, parallel arrangement when transplanting, and strict cultivation specifications, so that the plants grow neatly, reduce the light blocking between the columns, and make the plants evenly fill the light.

Mechanical roller blind: the use of mechanical roller blinds in winter can not only save manpower and reduce labor intensity, but also significantly shorten the time of uncovering and covering the straw curtain (or insulation quilt), and effectively extend the light time of vegetables in the shed.

How to use fill light for vegetables in vegetable greenhouses? What do you know?

Friends who have studied biology should know that plants need to photosynthesize.

How to use the fill light for the vegetables in the greenhouse? What do you know?

The first point is the choice of fill light. Different types of fill lights have different effects. Fluorescent lamp.

The advantage is that it is cheaper to use. Farmers can choose according to the needs of crop growth. Fluorescent or tungsten lamps commonly used by many farmers.

Now we use spectral supplemental light, mainly blue and red light, to simulate sunlight and let the plants absorb it. This kind of supplemental light, the wavelength of light emitted, the amount absorbed by the crop is also relatively sufficient. Reduce relative air humidity.

The second point is to clean the shed film, the shed film is easier to adsorb and accumulate dust and debris, etc., which will reduce the light transmittance of the shed film.

and the amount of light in the shed. Therefore, growers should also pay attention to cleaning the greenhouse film at any time in winter to ensure that the greenhouse film is always clean and has high light transmittance. Greenhouse vegetable mulching is not only conducive to increasing the ground temperature and reducing the air humidity in the shed, but also the reflected light formed after the mulching can also enhance the light intensity in the shed.

Vegetable base to make up for the lack of direct light at the base.

The third point is to keep the greenhouse mulch clean. Debris such as water droplets and dust* on the canopy membrane reduces light transmittance by about 30%. Frequent cleaning and rinsing of dust, dirt and water droplets on the tarpaulin surface helps keep the film surface clean and increases the light transmittance of the tarpaulin film.

Use a non-dripping membrane. The advantage of not dripping the film is that it can remove water vapor from the air close to the greenhouse film.

Adsorption to the surface of the film to prevent and eliminate fog in the shed and increase the light intensity.

The fourth point is to hang reflective film on the north wall of the shed, which can effectively increase the amount of light in the shed. Even in the winter in an environment with poor light conditions, the vegetables on the north side of the shed that are not conducive to flower picking can also have better light conditions. The turning time of the fill light should be determined according to the weather conditions and the needs of the crop, and cannot be used blindly.

Fill lights are not always on, leafy vegetables and Solanaceae.

Vegetables have different requirements for light. Have you learned this?

In winter, the natural light time is short and the intensity is relatively weak, which affects the lighting of the plastic greenhouse. Collecting more sunlight plays an important role in improving the yield and quality of vegetables.

Use drip-free film. At present, the most advanced plastic film on the market is mostly ordinary film, due to the high temperature and humidity in the shed, there are often many water droplets attached to the shed film, which affects the permeability of sunlight.

Clean up in a timely manner. It is necessary to clean, rinse, and wipe the dust and dirt on the outer wall of the greenhouse frequently, and clean the snow on the shed surface in time to increase the transparency of the shed film and increase the temperature in the shed.

Pay attention to heat preservation. The insulation covering outside the shed film should be covered and unrolled in time, and the covering should be rolled up as tightly as possible to ensure that the lighting area and lighting time reach the maximum.

Match the variety. The varieties of vegetables planted in the greenhouse should be reasonably matched, so that the height of the plants is scattered and orderly, and the phenomenon of blocking light from each other should be minimized, so as to make it evenly lighted, so as to enhance photosynthesis and improve yield and economic benefits.

In the northern region into winter, due to the shorter and shorter sunshine time, coupled with the continuous cloudy rain and snow weather in winter, will affect the growth of agricultural greenhouse crops to varying degrees, at this time the use of artificial plant light source is necessary to promote the growth of greenhouse crops. Below, I will combine the experience of many farmers in Hebei Province in recent years to supplement the light for the plants in the greenhouse, how to scientifically supplement the light for the plants and the problems that need to be paid attention to in artificial lighting? All living things depend on the sun to grow.

Due to the cold winter weather in the north, the sunshine time is short, the rain and snow are more, and the occurrence of haze, which will bring a series of problems to greenhouse crops and affect the normal growth of agricultural greenhouse crops: First of all, those temperatures will be lower, and the crops will grow slowly; In addition, with less light, photosynthesis in plants cannot be carried out efficiently; In addition, if the fungus occurs in continuous cloudy weather, it can also cause diseases such as gray mold. There was a year in Hebei Province that there was no sunshine for half a month of continuous cloudy days, causing a variety of vegetable diseases and causing heavy losses to vegetable farmers.

In recent years, in order to improve and increase the light intensity, farmers in many areas of Hebei Province have taken measures such as keeping the membrane clean and removing water droplets from the membrane in a timely manner. Also, remove the curtains in advance to let the vegetables see the light. Some farmers who grow vegetables try to use fluorescent lights to illuminate greenhouse vegetables, and many believe that incandescent lights are particularly bright and vegetables can also increase yields.

However, this idea is clearly wrong, as the spectrum of incandescent lamps has no effect on crop growth. During the assimilation of plant metabolism, red light is absorbed the most.

Red light is not only good for the synthesis of carbohydrates, but also for the development of long-day plants. Especially during the flowering and fruiting period, red light can increase the number of fruits and reduce the occurrence of deformed fruits. The role of blue light is to maximize the absorption rate of chlorophyll and carotenoids, regulate the opening of stomata in plants, and promote plant development.

Yellow light, on the other hand, can promote the development and germination of roots. Incandescent bulbs, on the other hand, do not contain the light waves needed for plant growth and at best raise the greenhouse temperature slightly. Because this is artificial lighting, it is necessary to buy special plant planting lights.

You can make up the light by the lamp, and now there are many plants that can be filled with light at night, and you can choose a film with good light transmittance, which can also solve the problem very well.

You can put some lights in the greenhouse or place some transparent glass plates, which can better fill the light and help vegetables grow better.

To remove the cover early and evening, it is necessary to regularly remove the dust and debris on the plastic film of the greenhouse. Be sure to choose a plastic film with good light transmittance.

Hello, dear, I am glad to answer for you, practice has proved that if the greenhouse collects more sunlight, it plays an important role in improving the yield and quality of vegetables. 1. When planting different kinds of vegetables in the greenhouse with a reasonable layout, the principle of "high in the north and low in the south" should be followed, so that the height of the plants is scattered and orderly, and the phenomenon of blocking each other is minimized. Transplanting the same kind of vegetables, strive to make the size of the seedlings consistent, make the plants grow neatly, and reduce the shading between the plants.

At the same time, it is better to plant furrows in the north-south direction to make them accept sunlight as much as possible. 2. Keep the shed film clean. Water droplets, dust and other debris on the greenhouse film will reduce the light transmittance by about 30%.

After 2 days, 10 days, and 15 days of use next to the new film section, the light in the greenhouse will decrease by % in turn. Therefore, it is necessary to clean frequently, rinse the dust, dirt and water droplets on the shed surface, and keep the membrane surface clean to increase the transparency of the shed film. Snow should also be swept away in time on snowy days.

Third, the selection of non-dropping film, the non-drop film in the production of the formula added several expressive agents, so that the affinity between water molecules and the film is greatly weakened, and the water droplets flow into the ground along the film surface without water droplets. The use of non-drip film buckle shed can increase the light intensity in the greenhouse and increase the greenhouse temperature. Fourth, reasonable uncover the straw curtain, on the premise of doing a good job of thermal insulation, appropriately remove the straw curtain and delay curtain for thermal insulation in advance, which can prolong the light time and increase the amount of lighting.

Generally, the curtain is lifted an hour after the sun comes out, and the curtain is closed half an hour before the sun sets. Especially on rainy days when the rain stops, the curtain should also be properly opened to make full use of the scattered light of the sun. 5. Set up a reflective curtain, with an aluminized film reflective curtain with a width of 2 meters and a length of 3 meters, and hang it on the north side of the greenhouse to make it vertical to the ground, which can brighten the ground by about 40% and increase the shed temperature by 3-4.

In addition, laying silver-grey mulch on the ground can also increase the light intensity between the plants. Sixth, do a good job in plant arrangement, timely pruning, branching, vine binding, old leaves and other field management, is conducive to the greenhouse ventilation and light transmission conditions. I hope this service can help you, thank you for your consultation, and I wish you all the best!