How to improve the lighting rate of vegetables in greenhouses, how to improve the lighting rate of v

1) Reasonable layout.

When planting different kinds of vegetables in greenhouses, 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 mutual shading should be 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 greenhouse 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 of the new film, the light in the shed will decrease by %. 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.

3) Cover the straw curtain reasonably.

On the premise of doing a good job of thermal insulation, appropriately remove the straw curtain and delayed cover 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 curtains should be properly removed to make full use of the sun's scattered light.

4) Use drip-free film.

The non-dripping film adds several expressive agents to the production formula, so that the affinity between the 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 shed and increase the temperature of the shed.

5) Set up a reflective curtain.

With an aluminized film reflective curtain with a width of 2 meters and a length of 3 meters, hang it on the north side of the greenhouse to make it perpendicular to the ground, which can brighten the ground by about 40% and increase the temperature of the shed by 3 4. In addition, laying silver-grey mulch on the ground can also increase the light intensity between the plants.

6) Do a good job of plant tidying.

Timely field management such as pruning, pruning, tying vines, and beating old leaves is conducive to ventilation and light transmission in the shed.

The plastic film is selected with high light transmittance, and selectively opens the light transmission and ventilation during the day.

If it is a rainy day, you can manually fill the light (turn on the lights in the shed), or lay the anti-film in the shed, of course, the money saving is to be diligent, regularly clean and clean the greenhouse film, and keep the greenhouse film clean.

The light conditions in the greenhouse directly affect the growth and development, yield and quality of vegetables. Especially in rainy and snowy weather, the light is relatively weak. Lack of light is a common problem for greenhouse vegetables.

Insufficient light not only fails to carry out more vigorous photosynthesis, but also reduces transpiration, and the plant grows slender, affecting the yield and quality of vegetables. Therefore, it is very necessary to take some effective measures to improve the light conditions in the greenhouse and produce greenhouse vegetables. Let me take a look at how to improve the light rate of the vegetable greenhouse!

1.Rational layout

When planting different kinds of vegetables in the greenhouse, the principle of "high in the north and low in the south" should be followed, so that the plant height is staggered and orderly, and the phenomenon of mutual shading should be minimized. When transplanting the same kind of vegetables, strive to make the size of the seedlings consistent, so that the plants grow neatly and reduce the shade between the plants. At the same time, it is best to plant them in a north-south orientation so that they receive as much sunlight as possible.

2.Keep the film clean

Water droplets, dust, and other debris on the film can reduce light transmittance by half. With the increase of the number of uses, the light in the shed decreases sequentially. Therefore, it is important to clean the film surface regularly and rinse off dust, dirt, and water droplets to increase the transparency of the film and thus keep the film surface clean.

3.Lift the curtain reasonably

On the premise of doing a good job of thermal insulation, remove the straw curtain and the delay curtain as soon as possible to keep warm, extend the light time, and increase the amount of light. The curtains are generally removed about an hour after the sun comes out and then closed half an hour before sunset. Especially on rainy days, when the rain stops, the curtains should be pulled open to take advantage of the diffused light of the sun.

4.Choose a drip-free film

The drip-free membrane is made with several active agents in the formulation, so the affinity between the water molecules and the membrane is greatly reduced, and the water droplets flow along the surface of the membrane without producing water droplets. The use of drip-free film increases the light intensity in the shed and increases the temperature in the shed.

5.Good plant preparation

Timely field management such as pruning, forking, tying vines, and beating old leaves is conducive to ventilation and light conditions in the shed. Sunlight is necessary for the photosynthesis of green plants. In the season when the number of light hours is low and the intensity is low, collecting more sunlight in the greenhouse plays an important role in improving the yield and quality of vegetables.

Reasonable layout of the location of the greenhouse, the use of the principle of low in the north and high in the south, replace the film with good permeability, and clean up the garbage and dust on the film in time, open the grass curtain covering the plant as soon as possible, and use the position from high to low when planting vegetables, so as to improve the lighting rate of the greenhouse; It is possible to replace the plastic film, adjust the lighting position of the greenhouse, and clean up the garbage on the film in time.

The construction of greenhouses should be rationally laid out, so that the greenhouses are built on the sunny side, and the specific methods adopted are high in the south and low in the north. Then we have to clean the film of the greenhouse from time to time to avoid dust blocking the sun.

Be sure to do a good job, choose plastic sheets with good light transmission effect, pay attention to the density of planting, open windows for ventilation when the temperature is relatively high, choose the appropriate dense planting, and clean up the garbage of plastic sheets in time.

When vegetables are planted, lighting is very important, so you should choose a suitable plastic film for regular ventilation and drying. Keep your time under tight control.

1.Strengthen the prevention and treatment of bacterial diseases.

Vegetables are prone to bacterial diseases after being disturbed by high temperatures, and it is recommended to spray fungicides such as quinoline copper and thiazole zinc to control bacteria.

2.Improved high temperature resistance.

Improve the tolerance of greenhouse vegetables to high temperatures and bright light. Spray chitin, amino acids, fulvic acid foliar fertilizer, etc. Foliar spraying 1500 times can form a protective film on the leaf surface and improve the high temperature resistance of the leaf.

To sum up, there are some precautions to prevent high temperature barriers for greenhouse vegetables. At this time, it is susceptible to the influence of high temperatures, and diseases such as sunburn, poor differentiation of flower buds, and fruit deformity occur. Therefore, everyone should study more and take precautions in advance.

Priority is given to cooling and shading to avoid severe sunburn of plants under high temperature and strong light. When the temperature is high during the day (although a shade net is installed), the air outlets in the upper and front parts of the greenhouse should be fully open to strengthen the exhaust air to reduce the temperature in the greenhouse. Do not pat the leaves too hard when pruning the plant.

The upper part of the fruit should have leaves that act as a "parasol". Two functional leaves should be left in the lower part of the fruit to ensure the smooth expansion and discoloration of the fruit. In summer, nightshade vegetables should be left with leaves, so that the fruits are hidden under the leaves as much as possible and avoid direct sunlight.

In addition, when planting vegetables in summer, the plant spacing can be appropriately close to each other, so that the stems and leaves cover each other and avoid direct sunlight on the fruits. Sunburn is most likely to occur in sunny weather after rain. Therefore, on a sudden sunny day after rain, it is necessary to cover the shade net or spray a cooling agent in time to prevent sunburn.

Chemical irrigation to prevent and control diseases. Due to the hot weather and the rapid evaporation of water, vegetable farmers often irrigate and fertilize frequently, which is easy to cause root damage.

Leave an opportunity for pathogenic bacteria to infect, resulting in root rot, wilt and other root diseases. When the temperature in the shed is too high and the soil evaporation is large, we must pay attention to timely watering to ensure that the vegetables have sufficient moisture**. At the same time, water-soluble fertilizers can be sprayed appropriately to enhance the resistance of fruits and reduce the occurrence of sunburn.

It is recommended that vegetable farmers pay attention to root cultivation, rinse microbial agents, and rinse or irrigate their roots with fungicides, methamethoxine, chlorobromoisocyanuric acid every once in a while to prevent the occurrence of root diseases.

Be sure to pay attention to the temperature, pay attention to the humidity, pay attention to the carbon dioxide content, pay attention to the condition of the soil, and fertilize and water reasonably.

It is necessary to properly ventilate, to properly reduce the temperature in the greenhouse, and to remove the problematic plants in time. It is necessary to prevent pests and diseases, and to avoid excessive temperature in the greenhouse.

Pay attention to temperature control, water regularly, pay attention to the skills of top dressing, prevent pests and diseases, be sure to spray pesticides regularly, and pay attention to management skills in this regard.

Be sure to shade the sun in time, do a good job of ventilation, and ensure that the temperature in the shed is constant, but don't let the temperature be too high, and also water in time.

When growing vegetables in the greenhouse, it is also necessary to pay attention to the temperature, so the temperature must be kept at about 25, and at the same time, it should be ventilated and opened appropriately, so as to promote air circulation.

You can build a very strong greenhouse, let the greenhouse have a very good temperature, and then plant some vegetables in it, and properly manage those vegetables.

You can do a good job of keeping warm and put some air conditioning inside, and you also need to do a good job of ventilation when planting, and when the weather is warmer, open the plastic sheet on it and accept the sunlight before planting.

When planting greenhouse vegetables, we must choose a good variety, and then we must plant it, and the time should also be adjusted with the weather temperature, so it may be effective to make vegetables grow faster and avoid more pests and diseases.

1. Ensure sufficient light to the greatest extent. 2. Keep warm and adjust temperature to ensure the appropriate temperature for vegetable growth. 3. Increase the application of organic fertilizer, fertilize the soil, 4. Implement soil testing and formula fertilization, so as to make fertilizer scientifically and reasonably.

5. Timely pruning and forking, dotting flowers, and thinning flowers and fruits. 6. Strengthen the diagnosis of pests and diseases, scientifically prevent and control pests and diseases, and use drugs rationally.

Hello, there are two reasons for this phenomenon, one is heavy stubble, a certain crop has a different preference for a certain or several nutrients, and the absorption of these elements is particularly strong, and the continuous planting of this crop will lack these elements in the soil. The ability of crops to absorb nutrients is restricted by the minimum nutrient rate, that is to say, the most lacking nutrients restrict the absorption of the most abundant nutrients, this lack of nutrients is often trace elements, and our soil testing and fertilization can not reach the level of measuring trace elements, so you often do not know which trace element is deficient, and then you take measures when the crop growth period shows the symptoms of lack of nutrients, and the effect is not obvious, and the loss has been caused. Therefore, it is best not to plant vegetables with heavy crops, but to rotate, and it is best to rotate with onion and garlic crops, which can also effectively control root-knot nematodes.

Another reason is fertilization, the crops will not completely absorb the organic fertilizers and chemical fertilizers you apply to the ground, especially chemical fertilizers. The side components contained in chemical fertilizers, including sodium chloride, will be deposited in the soil, resulting in a high concentration of soil solution, inhibiting the absorption of water, respiration, and the absorption of nutrients by crop roots, and the direct consequence is that crop growth declines, stress resistance is reduced, pests and diseases are aggravated, yield and quality are reduced, which directly affects the economic benefits of vegetable farmers.

So far, there is no particularly effective drug that can solve this problem well, and it can only be decomposed with biological fertilizer, that is, the beneficial bacterial community, which can have a certain effect, but it is not a panacea.

Hope my answer is helpful to you. 8

Ensure that vegetables are grown in the most suitable environment, with sufficient nutrition and no diseases.

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.

Measures such as strengthening the thermal insulation of the greenhouse, ensuring the tightness of the greenhouse in daily management, thickening the insulation, and exploring the cold-proof area can well improve the temperature of the greenhouse. It is reasonable windproof. When the temperature is too high, take windproof measures in time, which can quickly reduce the temperature in the warehouse.

Failure to do so will cause harm to the crop. Proper wind protection can also reduce the humidity in the warehouse and prevent the occurrence of diseases. If the temperature in the river is too low, you can set up a fill light and a reflective film to increase the temperature of the greenhouse, and at the same time, it can also detonate the temperature increase at night, which is also effective for raising the temperature of the greenhouse.

Removing the dust on the greenhouse film in time, improving the light transmittance of the greenhouse, and increasing the light of the greenhouse can increase the temperature of the greenhouse to a certain extent.

Timely laying of mulch film can effectively increase the ground temperature, and the operation row spacing can also be spread with rice husk or straw, which can effectively maintain the ground temperature, maintain soil moisture, and help the growth of water roots. In addition, antifreeze can also be sprayed to effectively prevent cold damage of crops, and full nutrient leaf fertilizer can also be sprayed on the leaf surface, which is also effective in improving the resistance of crops. By using a bioreactor in a plastic greenhouse, the heat generated by the straw can be used to raise the ground temperature while contributing to the air temperature rise.

Studies have shown that comparing plastic greenhouses that use straw bioreactors to those that do not use reactors increases the temperature inside the warehouse by more than 2.

The temperature inside the warehouse is also greatly affected by weather and seasonal changes. In winter, when it rains for days, the temperature in the warehouse does not supplement the temperature during the day, and the temperature is too low at night to make the vegetables grow poorly. In summer, when the temperature is high and the weather is fine, please pay attention to temperature regulation to avoid nutrient consumption caused by small temperature differences, apprenticeships, etc.

According to the survey, due to the long-term shortage of water, the leaves of the plant are small, the mechanical tissue formation is more, the fruit expansion rate is slow, the quality is poor, and the yield is reduced. When the relative humidity of the air is below 40% or above 90%, photosynthesis is hindered, adversely affecting growth and development.