Why doesn t wheat freeze to death in winter?

Some farmers said that in the past few years, the winter was relatively warm, and vegetables could be grown in the cold shed, but this winter, the tomatoes grown in the greenhouse were very seriously frost damaged. I obviously feel that this year is colder than last year, and now it is the strongest cooling, and it is snowing in some places.

I asked, how is the wheat growing? Have you watered before?

Farmers say that they often hear others say that the better the wheat grows, the more likely it is to freeze to death. At present, there is no frost damage, and the wheat is growing well, and there are three tillers.

The good ones have five tillers. It had rained once before, and I saved a watering. After planting, I have watered once, and almost no management has been done.

Now I am afraid that the temperature is too low, and the wheat will be frost damaged, and the tillering will not be able to form ears after the year. If it can be prevented in time, it is enough to ensure that the wheat overwinters normally.

In fact, this year, due to various factors, many farmers began to be very concerned about the output of grain, and in the past, there was less idea that a pound of grain could not be exchanged for a bottle of water. Wheat itself is a hardy crop and, in general, has the ability to withstand cold. The farmer's wheat is also growing well, and there is less chance of frost damage during the overwinter.

However, some wheat has not been watered with winter water, and the growth is vigorous or weak, and this type of wheat seedlings are susceptible to frost damage. At low temperatures, it inhibits the growth of wheat and has certain benefits. But at the same time, the cold resistance of such seedlings is poor, and farmers who have not been prevented in the early stage should pay attention.

Some farmers say that the low temperature has come, can they still water or spray antifreeze?

Wheat watering winter water also has conditional requirements, all say that winter irrigation should be early, in some places now the daytime temperature is below zero, the soil is frozen, in this case, watering, soil surface freezing, also has a great impact on wheat seedlings. Therefore, this situation is not suitable for watering overwintering water anymore. In addition, some farmers need to spray potassium dihydrogen phosphate.

and brassin, when the temperature is too low, the ability of wheat seedlings to absorb is reduced, and the best spraying effect is generally seven days before the cold snap.

Frost damage occurs during wheat overwintering, and management should be strengthened in the spring regreening period. Tillering has the effect of regeneration, if the main stem or tiller is frozen to death, when the water and fertilizer conditions are reached, a new tiller will grow again. Therefore, in the overwintering or early spring, when the wheat has frost damage, it is necessary to pay attention to watering and topdressing of fast-acting nitrogen fertilizer after returning to green, so as to promote the re-tillering of wheat seedlings to improve the panicle rate.

During the overwintering period, it is not recommended for farmers to blindly carry out frost damage, watering, spraying antifreeze, and suppressing these work, which will affect the growth of wheat.

If you grow wheat in the winter, you can cover the wheat with a protective film so that it will not freeze to death.

Because wheat is dormant in winter, it has a certain ability to resist cold, so it will not freeze to death.

Because it itself is very hardy. And it's designed to adapt to the outside environment. Regulates its own moisture content.

Whether wheat freezes to death in winter depends on the approved area of the wheat variety.

If the wheat variety has been approved locally, it can safely overwinter and will not freeze to death if the old management is in place and the frozen water is poured. If the wheat varieties in Hebei and Shandong are planted in the southern part of Henan and Jiangsu, the wheat varieties in Anhui will be dangerous, and their latitude is southern, and the frost resistance of wheat varieties is obviously worse than that of Hebei and Shandong, and frost damage will occur in low temperature weather.

Winter wheat will not freeze to death in winter, the growth period of winter wheat is longer, the best growth temperature is 16-20 degrees, winter wheat needs to go through a period of low temperature growth process in the growth process, so that there will be spring heading and maturity.

Wheat cultivation methods

1. Prepare the soil: Prepare soft, breathable and fertile soil in advance for planting wheat seedlings. If it is a potted plant, choose a pot with a slightly larger caliber, fill it with soil, and mix humus in the garden soil.

2. Treat seeds: It is best to soak wheat seeds in advance to promote germination, and then sow them after they are exposed, and the purchased seeds can be planted directly.

3. Sow seeds into the soil: sprinkle wheat seeds evenly on the surface of the soil, cover the thin soil, and water and moisturize.

4. Later management: wheat seedlings have strong adaptability to the environment, drought tolerance and cold resistance, but it is best to properly top dressing in the peak growth season.

If there is snow cover, it is no problem to have more than ten degrees below zero, this is northern winter wheat. If there is no snow cover, it will be fine for a few degrees below zero for a short time.

When the average temperature is more than 2 months lower than normal in winter, and the minimum temperature is more than 15 13 days, the vast snow-free wheat fields and unstable snow areas in the north are prone to winter long-cold frost damage.

Wheat is dormant and very cold-tolerant during the overwintering stage. However, due to the characteristics of wheat in the Huanghuai wheat area that does not stop growing over winter, the wheat at this stage is slightly longer in the aboveground part and the underground part of the growth stage, once the weather is warm, the seedlings begin to grow again, and the cold resistance is relatively weakened, and when the cold current cools down to 15 13 again, it will produce more serious overwintering frost damage. Overwintering frost damage is generally characterized by frozen leaves, which is less harmful to production.

1. I'm not a wheat expert;

2. What you said is "the leaves on the ground will freeze to death", there is no problem of whether the leaves of winter wheat freeze to death or not, and whether to freeze to death or not to freeze to death is the problem of winter wheat roots. As long as the root system of wheat is fine, what does it have to do with the leaves?

The overwintering wheat was not frozen to death under the snow cover, indicating that the temperature of the wheat did not drop too low, that is, the heat was not transferred to the outside world much, indicating that there was a layer of poor conductor of heat between the wheat and the outside world, and between the wheat and the outside world was snow and air.

There is a layer of imflowing air in the middle of the fluffy snow and between the snow and the ground, and the snow and air are poor conductors of heat, and the heat of the soil is not easily conducted, so the temperature of the ground will not drop too much, and the crops will not be frozen to death.

Winter wheat will not freeze to death in winter, winter wheat growth period is longer, the best growth temperature is 16-20 degrees, winter wheat will produce a lot of sugar in the body in winter, this sugar can greatly improve the cold resistance of winter wheat, at the same time, winter wheat needs to go through a period of low temperature growth process in the growth process, so that there will be spring heading and maturity, at the same time, only after experiencing winter, winter wheat will usher in the real growth period.

Winter wheat is hardy.

Winter wheat is relatively cold-resistant, the lowest temperature of cold tolerance is about minus 17 degrees, winter wheat can survive the winter in the north, there is no warm hall to cover the air will not be frozen to death, there will be perfect winter preparations:

First of all, the soil can be suppressed to make the soil compact, thereby increasing the temperature of the degree, and then the soil fertilizer can be implemented to increase the surface of the land by about 2 degrees to protect the winter wheat from winter.

Secondly, it is necessary to choose a sunny day at noon to press wheat to prevent cold, and the wheat field that has been watered with frozen water needs to be pressed in time to make the freeze-thaw layer effectively protect the water from evaporation, so as to protect the wheat seedlings from freezing to death.

Finally, on the basis of scratching the wheat loose soil, the soil is covered with tight branches on the wheat seedlings with farm tools, and the soil thickness is about 2 cm, which can effectively reduce the evaporation of water from the soil and ensure that the wheat is green and winter.

Winter wheat for the winter.

Winter wheat is not afraid of freezing, winter wheat wintering is more particular, there are certain wintering methods:

1. Check the seedlings and replant.

Before winter wheat wintering, should be timely check whether there is a lack of seedlings, if there is a need to check the seedlings in time to replant, the seeds of winter wheat can be soaked in cold water in advance for more than 24 hours, dry and sow to ensure that the whole seedlings, even seedlings.

2. Prevention and control of pests and diseases.

Winter wheat should be prepared for pests and diseases when overwintering, so as to avoid affecting the growth of winter wheat.

3. Cultivating loose soil.

Winter wheat overwintering when encountering stagnant water, pretend to be in time to loosen the soil, promote the growth of the root system, when the seedlings are controlled at more than 7 cm, the root control is prosperous, and the saline-alkali land should be hoeed after rain to prevent the return of salt.

Frost damage occurs when the temperature of wheat is below 10 for a long time, and can also occur when the temperature drops suddenly or when the spring cold falls. Wheat prevention and control can be sprinkled with quicklime in the field, or 10-15 kg of urea per mu can be applied at the jointing stage of regreening, and the wheat with frozen leaves can be sprayed with potassium dihydrogen phosphate + brassinolide in early spring to promote the regreening of wheat seedlings.

Winter wheat is planted at a suitable temperature between 14 and 18 per day. Among them, the winter varieties are 16-18, and the semi-winter varieties are 14-16. The wheat planted during this period can have two tillers per plant before freezing, and the plant has a strong and well-developed root system, so it has a strong frost resistance.

In our local area, it is usually planted in early October, depending on the actual temperature.

Wheat is a relatively drought-tolerant and frost-tolerant crop, depending on the period in which the wheat is located. If the wheat encounters such a low temperature during the jointing period, not to mention being frozen to death, at least it will be frostbitten. This will affect the yield of wheat.

If the wheat is in the growth period from the beginning of the seedling to the end of tillering, the wheat will not freeze to death.

Each region where wheat is grown has an optimal sowing date suitable for locally grown wheat. For example, in our Shijiazhuang area, the time for planting wheat is from October 5 to 20, not too early or too late. The wheat fields that grow too early and the three types of wheat fields that miss the best sowing date are prone to frost damage due to the lack of strong seedlings before winter and the extreme cold weather of minus 12 degrees.

At the beginning of winter, due to people's concerns about the weather, there may be a relative decrease in the cultivation of crops, so after the beginning of winter, can wheat be planted? This is a question that many young people don't understand, won't the wheat be planted at this time and freeze to death? Let's take a look.

1. Deep cultivation, suppression, loosening soil medium fertility above the water watering wheat field, after the beginning of winter, when the total number of tillers per mu reaches the number of planned spikes, the deep root should be broken, with the removal of the left and right teeth of the hoe interlaced, the depth of 10 cm. After deep cultivation, it should be immediately flattened and steadfast, to prevent the seedlings from being pressed and the wind is lost, and it is necessary to water and accompany the winter water in time. For wheat fields with large populations, deep rooting has an obvious effect on controlling the development of the group.

In wheat fields with overgrown populations and too large populations, suppressive measures can also be used to inhibit tillering growth before wintering. In the wheat field where the cultivation is extensive and there are more slumps, it is suppressed before the ground is frozen, crushed, and cracks are filled, which can play a role in keeping the soil warm and retaining moisture. Wheat pressing should be carried out after noon, so as not to have frost in the morning to suppress the injured seedlings, and saline-alkali land should not be suppressed.

It should be noted that after the wheat field is watered with winter water, it is easy to cause surface compaction, cracks, soil moisture is easy to lose, pull off wheat roots, freeze wheat seedlings, and hoe and loosen the soil in time.

2. Ensure that winter water and winter fertilizer can improve soil nutrients and water conditions, stabilize ground temperature changes, and create good conditions for wheat seedlings to return to green and improve tillering (when wheat develops, branches are born at the base of the seedlings close to the soil called tillering), and grasp the initiative of spring management. Winter irrigation in saline-alkali land also has the effect of alkali pressure and soil modification. The amount of winter fertilizer should not be too large, according to the seedling conditions, the amount per mu of middle-yield wheat field accounts for about 20 of the amount of top dressing, and the plots without bottom phosphorus fertilizer should be combined with nitrogen and phosphorus.

Wheat fields that have been applied with full-bottom chemical fertilizer do not chase winter fertilizer. Winter watering should end when the average daily temperature is 7 8 nights and the days are gone. In order to use the effective accumulated temperature in early winter and early spring freeze-thaw period, increase the sowing ground temperature, promote root tillering, in the case of high soil moisture, it is not suitable to water winter water.

3. Pay attention to the prevention of frost damage and the prevention of frost damage after the field management, in addition to the use of improved seeds, the application of sufficient base fertilizer, and the cultivation of strong seedlings, but also should be applied in the wintering period to cover the wheat and suppress the strong seedlings, which can be insulated, fertilized, and anti-freezing. Where conditions permit, water can also be diverted for winter irrigation. Wheat leaves are frozen, as long as the tillering nodes are not frozen to death, fast-acting chemical fertilizers should be applied as soon as possible to promote seedling transformation; In case of dryness, top dressing should be combined with watering shed dust to fight drought.

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Frost damage in early winter and overwintering stage are generally characterized by frozen leaves, which have little effect on wheat yield.

Wheat cultivation techniques

The crop grows well on both acidic and slightly alkaline soils, but the most suitable soil pH is to.

Farming and land preparation

The land preparation of the crop in the dry land should be based on the deep tillage layer year by year, combined with the application of organic fertilizer, and the improvement of water and fertilizer conservation, and the land preparation should be carried out according to different multiple cropping forms. That is, the previous crop harvested earlier, such as spring corn, sorghum, tobacco, etc., the harvest should first be shallow tillage to eliminate stubble, and then deep ploughing of the kang soil, so that the stubble rots and accept the autumn rain, shallow rake after the rain, reduce evaporation; The other category, such as sweet potato, cotton, etc., has a tight harvest time, and if the conventional method is used, it is bound to delay the sowing date, which is one of the important reasons for the low yield of the crop in the southwest region. Therefore, on the one hand, the implementation of loosening soil and moisture between the rows in the previous crop and later period, and then plowing and leveling when planting wheat; On the other hand, it is advocated to dig potatoes, level the ground, fertilize, sow and other continuous operations to ensure that the crop is sown in a timely manner.

High-yield technology

1. Pay attention to the selection of high-fertilizer and water plots. High-yield and high-quality crop varieties require that soil nutrients must be comprehensive and sufficient to meet the needs of high-yield cultivation, so it is advisable to choose plots with high soil fertility and good watering conditions, increase organic fertilizer, and adopt formula fertilization technology.

2. Pay attention to late sowing at the appropriate time, and determine the appropriate basic seedlings according to the characteristics of the variety. It is necessary to prevent excessive sowing volume, resulting in passive post-management.

3. Pay attention to prevent lodging and reapply jointing fertilizer. Some of the high-quality crop varieties promoted are not resistant to lodging, especially for wheat fields with too large groups, a chemical control treatment must be carried out before returning to jointing, and paclobutrazol or wheat yefeng can be sprayed. It is necessary to reapply jointing fertilizer to control the formation of excess falling ears and promote large ears and more grains.

4. Pay attention to watering grouting water, wheat yellow water, and spraying foliar fertilizer to prevent premature aging. Watering grouting water plays an important role in increasing granularity weight and preventing dry and hot air. In dry weather, the use of wheat yellow sweet potato is conducive to intercropping and preventing premature aging.

In the first half of May, combined with the prevention and control of pests and diseases, spray 2 to 3 times of foliar fertilizer, such as potassium dihydrogen phosphate, which can reduce the harm of dry and hot air and increase yield.

5. Pay attention to the prevention and control of pests and diseases. Generally speaking, the crop is more susceptible to pests and diseases, such as sheath paleopathy, powdery mildew, and aphids occur earlier and heavier than conventional varieties. It should be prevented and treated as soon as possible according to the forecast.

6. Spray the crop treasure once when the crop has just broken and reached about 60% to 70% before heading and flowering, so as to activate the biological enzyme activity in the crop, promote coordinated growth, enhance the photosynthesis of functional leaves, significantly reduce the empty stubble rate, improve the seed setting rate and 1000-grain weight, so as to achieve the effect of increasing yield.