How to remedy the freezing damage of greenhouse vegetables, and how to remedy the freezing of vegeta

How to save vegetables after frost damage.

1. Don't close the shed immediately to heat up:

After the greenhouse vegetables are frozen, do not close the greenhouse immediately to raise the temperature, if the temperature rises too fast, the frozen tissues will be dehydrated and die. After the sun comes out, the vent should be opened moderately, and then the vent should be gradually reduced and closed after a period of time, so that the temperature of the shed will rise slowly, so that the frozen tissue can fully absorb water, promote cell resurrection, and reduce tissue death;

2. Prune dead branches.

Cut off the stems and leaves that have been damaged by frost to prevent the tissue from becoming moldy and disease-inducing.

3. Irrigation and heat preservation.

Irrigation or watering of frozen vegetables can increase the heat capacity of the soil and prevent the ground temperature from continuing to drop. After irrigation, it can stabilize the atmospheric temperature near the surface layer, so that the air temperature rises on average, which is conducive to the natural recovery of some cell tissues of frozen vegetables, thereby reducing frost damage. The water should be watered thoroughly, and the water in the field should be soaked out on the same day. After irrigation or watering, seize the favorable period when the temperature rises to loosen the soil and keep it warm.

4. Top dressing of fast-acting fertilizer to promote recovery.

For vegetables that are not dead at the growth point, irrigate them in time, cultivate the soil, and remove frozen branches and leaves. After the seedlings of frozen vegetables are retired, they can be applied in time with soil blessing + natural macroelements to promote the recovery and growth of plants, improve the life of the body, and reduce losses. In winter, the temperature is low, less nitrogen fertilizer should be applied, more phosphorus and potassium fertilizer should be applied, and anti-expert + Chimeitong can be appropriately sprayed to speed up the repair of damaged parts.

5. Shade and spray with water.

After 2-3 days of mild frostbite, greenhouse vegetables and seedlings should be shaded for a short period of time around noon to avoid sudden water loss and death due to strong sunlight. At the same time, according to the humidity situation, spray a small amount of water at noon to increase the surface temperature and humidity, inhibit the dehydration and drying of frozen tissues, and promote the absorption of water by frozen tissues. Reduce ventilation for a few days and raise the temperature of the shed appropriately to promote the recovery of vitality.

6. Disease prevention and replanting.

Frozen vegetables are susceptible to pests and diseases, fungicides such as chlorothalonil can be used, and fumigants can also be used in the shed to kill germs. If the frost is severe, pay attention to timely replanting.

In winter, continuous low temperature and rain and snow weather will cause the greenhouse vegetable crisis continues, if improper management will cause crops frost damage, photosynthesis hindered, lack of nutrients, fruit deformity, poor color and other physiological obstacles, the key at this time is to improve the greenhouse vegetable stress resistance.

After the vegetables are frozen, we must go to remedy them in time. If you don't remedy the vegetables in time, it will have a great impact on the quality of the vegetables. And we can also see that vegetables are also rich in a lot of nutrients, so vegetables are actually very important for our normal life.

Of course, we can also see that everyone is also very concerned about this. Therefore, after the vegetables are frozen, we must go to remedy them in time.

If we have the ability, we should move all the vegetables to the greenhouse as soon as possible, and let the vegetables be ventilated, and keep them in a good environment. If you don't have the ability to move the location in time, I think you can use plastic wrap.

I think it's also very important to cover all the vegetables directly, so that you can also keep them warm to a certain extent, and it is also very important for the development of vegetables. Therefore, after we find that the vegetables are frozen, we want to warm up the vegetables.

I think it is also possible to fertilize the vegetables and give them energy and water, so that they can grow better and faster. So we can see that this is also very important, and I think this is also very important for the environment in which the vegetables are grown. And it can also protect the better growth of vegetables.

We can also loosen the soil properly for the vegetables, and let the cold air in them be discharged. And we can also wrap the surface of the vegetables with clothes and other things, so that we can protect the vegetables well, and this method is also very good.

The best remedy for freezing is to transplant them indoors, to ensure that the indoor temperature is controlled at about 20, and they can be soaked in warm water before eating.

If you want to remedy, you can put it in a place where the wind does not let the wind blow, let it slow down, or cover it with a black plastic bag, or let the greenhouse slow down when it heats up, so that the dish can slowly adapt.

There should be plenty of light so that it can be remedied in time, and it should also have a very good temperature.

Hello, shed vegetables antifreeze measures.

Enhance coverage. Buckle a small arch in the greenhouse, make an arch with a thin bamboo pole, cover the film at night, and cover the grass on the film; Cover the shed with mulch film to warm and moisturize. The bottom of the shed is made of plastic film as an apron, which can significantly reduce the invasion of cold air at the bottom; At the same time, pay attention to plugging the gaps in the shed to minimize the heat dissipation of the gaps.

On the north side of the greenhouse, crop straw is piled up to form a windproof barrier to protect from wind and cold.

Temporary warming. When the temperature in the greenhouse is lower than 15 during the day and 5 at night, cold damage or frost damage may occur. At night, temporary heating measures should be taken to artificially supplement the heat energy, that is, several briquette stoves should be placed in the shed to increase the temperature in the shed.

However, it is necessary to pay attention to prevent carbon dioxide poisoning, and when adding briquettes and taking out the coal stove, the greenhouse should be ventilated first, and then the person should enter.

Strengthen fertilizer and water management. Before and during the low temperature frost damage, the use of nitrogen fertilizer should be stopped to prevent the plant from being too soft and the cold resistance of the plant from declining and the fertilizer from killing the seedlings. Water dilute manure water in the shed to make the soil not easy to freeze and achieve seedling protection and cold protection.

In rural areas, frost and frost protection for crops is done every year. For some vegetables, flowers and plants are frost and frost proof, most of them will take the construction of plastic sheds, and for some potted flowers and plants that can be moved, frost and frost protection can only be moved to a warm house. The trunk is painted white:

This is the use of the reflective effect of white lime to reduce heat absorption on sunny days, narrow the temperature difference between day and night, prevent the bark from freezing and cracking, and have the effect of controlling diseases and insects.

The <> method is to transplant and plant crops, between the spacing and row spacing of vegetables, cover a layer of 2-3cm wild firewood, straw, straw, straw, millet, sawdust ash, and bran residue to let them slowly ferment and moisturize, and can also increase the fertility of crops and promote crop insulation for winter. So these kinds of use without frost and anti-freezing, spinach is not afraid of frost, nor is it afraid of freezing, it is no longer like it in winter, and there is a chance to grow to a tender green and delicious appearance in the case of watering and fertilization in the coming year, so there is garlic and coriander left.

The temperature difference between morning and evening is particularly large when frost, so you can choose to use plant ash in the morning to prevent freezing, the practice is to sprinkle plant ash on the surface of crops, and it will produce heat after the plant ash encounters frost, which can not only thaw crops, but also prevent crop diseases. Spreading dry manure to prevent frost damage is the most commonly used soil method for growing these two crops in my rural hometown in Gansu Province, and it is very simple to operate. It is enough to sprinkle the dry manure that has been fertile in the open space in advance directly in the gaps between these crops.

In the planting of many wintering crops, straw is used to cover between the rows or directly on the canopy surface of the plant, which can play a good role in protecting against cold and warmth. For example, in the management of tea plantations, plants such as straw, thatch and wheat straw are often used and covered in the fields, with a surface thickness of about 6 10 cm. Weather that is prone to early frost is very high, and many soybean farmers now prepare some waste tires and light these tires to resist frost before predicting that there will be an early frost.

Fumigation, spraying, shelterbelt, mulching and other methods can be used to increase or slow down the cooling rate, and drought-resistant varieties and early-maturing varieties can be selected to sow seeds in a timely manner, cultivate strong seedlings, improve soil and other methods to prevent frost and reduce hazards.

If you suffer from frost damage, the best remedy is actually to pay attention to keeping warm, and you should use this plastic film to buckle it, and then it can have a very warm effect.

Crops are damaged by frost in winter, we should spread film or straw for crops in time, which can effectively prevent crops from continuing to be damaged by frost.

A greenhouse can be built so that the temperature in the greenhouse is relatively high, and the crops will not freeze to death.

I think you should move these frozen crops to the greenhouse, be sure to raise the temperature to about 20 degrees Celsius, and then water and fertilize it, and that's it.

I think it would be possible to build a greenhouse to prevent the crops from freezing in the winter, but the cost of this will naturally be very high.

Greenhouse construction In order to prevent heavy snow from crushing the greenhouse, the conditional steel and concrete skeleton greenhouse, the use of bamboo, wood, plastic frame to ensure the strength, as far as possible to use the arch structure to enhance the supporting force, the roof of the shed to have a slope, in order to avoid snow.

2.Before snowfall, pay attention to check the condition of the shed film damage, scaffolding firmness, shed mouth insulation, film pressing line fastening, etc., and repair it in time. Take thermal insulation measures to prevent vegetable crops from freezing and can be harvested early.

Control watering and top dressing to reduce humidity and avoid overgrowth. If you like warm vegetables and sail stupid vegetables, you can add an extra layer of greenhouse film or build a small arch shed; If the temperature drops more, in addition to the seedling greenhouse, a small arch shed should be built to cover the cold quilt in addition to the straw curtain.

3.When snowfall, the number of columns and diagonal braces can be increased to clear the snow in time. In case of continuous snow, reflective curtains can be hung, or high-power bulbs can be hung for light and heating, and the wind should be released when the snow stops at noon.

Snowfall during the day, if the temperature is not very low, the grass can not fall, and the shed temperature does not drop, the light time should be appropriately extended; When the temperature is low or snowfalls at night, the grass should be dropped and covered with a greenhouse film to prevent the grass from getting wet.

4.After snowfall, repair the greenhouse that is overwhelmed by heavy snow, and remove the snow in time to increase the amount of light. Strengthen management, promote the rejuvenation of seedlings, carry out tillage and hoeing to increase the ground temperature, and gradually increase the temperature of the shed.

If the rainy and snowy weather lasts for a long time, pay attention to gradually uncovering the vegetables in a few days when the snow is suddenly sunny to avoid vegetables wilting and flashing seedlings. For the weaker growing greenhouses, spray 1% glucose solution and foliar fertilizer. If the disease occurs, it can be controlled with or good smoke.

If the heavy snow overwhelms the greenhouse, first of all, all the snow on the greenhouse should be treated and leaked, and then the greenhouse film should be removed and the steel pipe inside should be repaired. The wheel cavity can be rebuilt and it will be done.

The heavy snow overwhelmed the vegetable greenhouse, and the repair must be to re-lay the foundation, and then look at the damaged place of the greenhouse, and re-energize the vegetable greenhouse after the machine.

In the case of heavy snow overwhelming the vegetable greenhouse, it has a certain adverse effect on the cultivation of vegetables, so it is necessary to use strong materials to repair it reasonably, and to do a good job of heat preservation, so as to achieve a good degree of use.

The university has overwhelmed the vegetable greenhouse, how to fix it? Then you should first clean up the snow and then slowly put up the greenhouse. How can it be less labor-saving than building a greenhouse? How to fix it? Vegetable farmers will fix it.

The university has overwhelmed the vegetable greenhouse, then you have to look at the pigs. If the main good family is not finished, you can fix it.

Greenhouse vegetables can be used mulch film, greenhouse film, greenhouse film respectively for multiple coverage insulation and cold protection, because the greenhouse and the greenhouse are separated by air, can significantly increase the temperature in the greenhouse. In case of heavy snowfall, manual snow scraping can be used, and if necessary, film breaking measures can be used to protect the shed to prevent damage to the greenhouse. On the basis of freezing the seeds before sowing, the seedlings were refined at low temperature at the seedling stage to enhance the cold resistance of the plants.

For conditional greenhouses, use stoves, small boilers, coal-fired fans, oil-fired fans, etc. to supplement heat as much as possible. Pay attention to the weather forecast and apply foliar antifreeze or cryoprotectants before low temperature frost damage comes. <

Prevention of low-temperature frost damage of open-field vegetables: Before the occurrence of low-temperature frost injury, the soil is cultivated in combination with cultivating, and the soil depth is 5 10 cm, which can not only loosen the soil, but also increase the soil temperature and protect the roots. On the afternoon before the arrival of low temperature frost damage, 100 150 kg of straw or wheat straw per mu should be evenly covered on the vegetable furrow and vegetables, which can reduce the frost damage.

It can also be lightly covered with mulch film on vegetables to prevent the harm of late frost, or before cooling and frost damage, use straw around the field to smoke or spray plant cold resistance and other prevention.

During the vegetable growing season, when the temperature is below 0 degrees, the plant will also freeze, which will affect the plant's tissues if the low temperature continues. Vegetables will be more severely affected by freezing, especially when the temperature drops sharply. <>

After the vegetables are frozen, if it is a seedling or reproductive growth stage, the frost damage is more serious, the ventilation opening, the side row, near the shed film and the higher ground frost damage is more serious, if it is cloudy and there is no rain, the frost damage will be slightly lighter.

Frost-damaged seeds are generally more difficult to germinate, vegetable leaves will be thinned and rotten by frosting, like scalding with boiling water, the growth point of the heart leaf will turn black, the fruit will change color and soften when frosted, and finally rot and fall, the root system will stop growing when frozen, and the root system will turn black.

After the vegetables are frozen, the sun should be properly opened after the sun comes out, do not open all at one time, and the closure can not be closed all at one time, so that the greenhouse heating process is slower, it is not recommended to let the sun shine directly on the vegetables after freezing, which will cause the vegetables to wither quickly, you can set up a black shade net in the shed to reduce direct sunlight. <>

After being frozen, the application of fast-acting fertilizer can improve the nutritional status of vegetables, and can improve the frost resistance of vegetables, promote their recovery, generally speaking, the foliar spraying effect is better than the root application effect, leafy vegetables are recommended to spray 1% urea or sea elf foliar fertilizer 800 times spraying, sea elf contains humic acid, seaweed essence and other anti-freezing factors, which are helpful for pre-freezing damage and frost damage remediation.