What is the remedy for the yellow and weak seedlings of wheat?

The sowing amount is too large, resulting in weak wheat seedlings. Many farmers feel that more sowing yields are higher; 1 acre of ground is planted with nearly 100 catties; ConclusionAfter budding, there are too many people, nutrients are insufficient, and the sunlight is not in place, resulting in incomplete personal development and weak seedlings, the solution is: manipulate the sowing amount when sowing, and 1 mu of land can meet the requirements of a bumper harvest at about 25 catties; There has been an effective way to carry out thinning seedlings with yellow seedlings and weak seedlings.

The drought of seedlings has led to the weak condition of yellow seedlings.

The most suitable soil moisture for wheat germination is 60%-70%, less than 40%, and wheat can also germinate, but the seedlings are weak. The main reasons are that the rhizome is underdeveloped, the secondary roots are few, the growth is slow, the heading is difficult, the rice seedlings are short, and the lower leaves are pale yellow. The solution is to irrigate and increase the application of fast-acting fertilizer.

Fertilizer is not scientific. When wheat is sown, due to various reasons, no or less base fertilizer, serious lack of nutrients such as light fertilizer in the soil, after wheat germination, digestion and absorption can not be enough nutrients, resulting in the occurrence of yellow seedlings and weak seedlings.

The solution is watering and fertilizing. In this case, a small amount of available nitrogen fertilizer should be filled immediately to improve the nutrient content of rice seedlings and promote the growth and development of rhizomes and seedlings as soon as possible. Several chemical fertilizers such as humic acid water-soluble fertilizer, leaf fertilizer, photosynthesis-promoting leaf fertilizer, and brassinolide can be sprayed on the leaves of wheat to carry out nutrient filling on the foliar surface of wheat to regulate the living environment of wheat and rice seedlings.

It can also be fertilized in advance to fill the various fertilizers needed for the growth and development of wheat.

Wheat seeds are sown too deeply, and there are still manpower to find a way to solve such a problem. For example, use an iron rake or a bamboo rake to shake the soil layer around the rice seedlings outward, which can make the soil layer lighter, which is beneficial to the rise of soil temperature and sunlight exposure at the roots of wheat rice seedlings, and promote the growth and development of rice seedlings. For the rice seedlings in this situation, we must fully consider the problem of keeping the rice seedlings warm through the winter, and spray cold-resistant leaf fertilizer to ensure that the rice seedlings survive the winter normally.

If the wheat is yellow and weak, if it is because of frost damage, then it can be solved by watering. If it is caused by drought in the field, then watering can be used to alleviate the drought, and if it is because the herbicide dose is too large, then the herbicide use can be reduced.

First, sowing too deep leads to poor root development and insufficient breathing.

This situation is not difficult to solve, and it is recommended to use a single dose of oxazalin combined with foliar fertilizer spraying, which can basically return to normal growth in three to five days.

Second, the yellow seedlings of wheat after the corn stubble, and the wheat seedlings after the soybean or other broad-leaved crops are not yellow seedlings, which is caused by the repeated conflict between the two crops before and after the nutrient absorption.

This is not difficult to solve, it is recommended to use brassinolide with foliar fertilizer, and you can basically see the green the next day.

Third, sowing too early or too late, high temperature in the early stage and too fast growth lead to underdeveloped root system and weak seedlings, and the later rain and cooling cause stunted and unstrong wheat development.

The remedy is: if there is nitrogen deficiency in wheat seedlings, 10 15 kg of urea can be applied per mu, and nitrogen deficiency turns yellow after spring. About 5 kg of urea per mu can be applied at the rejuvenation stage, and 12 15 kg of urea per mu can be applied at the upright or jointing stage.

It can also be sprayed on the foliar surface when the wheat seedlings are yellow, and the fertilizer is sprayed twice with 2% concentration of urea solution, with an interval of about 7 days each time.

1. The quality of cultivated land is poor and the bottom fertilizer is insufficient. In order to prevent the normal growth of winter wheat from being affected due to the return of corn straw to the field, when using urea as the base fertilizer, choose slow-controlled urea as much as possible, or choose nitrogen, phosphorus and potassium controlled-release fertilizer with nitrogen control of about 15%.

2. Pest damage. Wheat seeds must be dressed with insecticides, for example, thiamethoxam coating agent, phosphine and so on. After the bud worms are found on the plant, the drug should be sprayed immediately, and 1000 times the liquid pymetrozine, thiamethoxam, acetamiprid, etc.

The problem of seeds is also related to the weather, which may be caused by germs or drought.

The problem of seeds is related to the planting environment and the weather, and there are many reasons for this.

At present, the wheat field planted is a plot of straw returning to the field, and there will be many bad operations in straw returning to the field, resulting in wheat yellowing. For example, the incomplete crushing of straw returning to the field and the large amount of straw returning to the field cause the soil to run and burn seedlings and produce yellowing; In fact, about the problem of wheat yellowing, the little helper has said a lot before (friends who pay attention to the little helper will see it for the first time), there are many factors, and the friends who have not seen it are fine, and the following will be specific to the 6 reasons for the yellowing of wheat from several aspects.

<> pests and diseases will cause the wheat seedlings to turn yellow; Sowing too deep of wheat can lead to yellowing; The quality of straw returning to the field is not high, resulting in the suspension of wheat seeds and causing yellowing; If the straw returning plot is not increased with urea, the wheat seedlings will turn yellow; Failure to suppress after sowing will cause the wheat seedlings to turn yellow; Drought can also cause yellowing. In addition, the yellowing of wheat seedlings may have the following situations, first of all, the serious occurrence of wheat damage caused by large soil moisture, second, fertilizer damage, inorganic fertilizer application amount, improper application method, large application amount or shallow application, seed and fertilizer contact caused by burning seedlings die, from the overall point of view, the straw returned to the field did not rot. **When the seeds are unearthed, when the wheat seedlings are unearthed, in the event of high temperature and dry weather, the heat and fertilizer power of the ground are low, and the roots of the wheat seedlings are born, just like the evaporated hot wheat when it is just green, because the various tissues of the leaves that have just grown are not mature, it will turn yellow, which is also a normal phenomenon, and the tissue of the leaves will change color after about a week or so when they mature and begin to photosynthesize.

I'm afraid of drought in the womb! That's what I'm talking about! If the yellowing of the wheat is severe after it emerges, it is best to water it immediately!

After the field can leave, hurry up and apply herbicides! In this way, the wheat seedlings will not grow wildly! No weeds yet!

The timing of the period and the size of the sowing amount will also lead to the phenomenon of wheat seedling yellowing. For those who have already been harmed by round spiders, one should be cultivated and weeded to eradicate the egg source to prevent and control the recurrence. Second, it is necessary to spray with different pesticides according to local conditions.

For the problem of weak yellowing of wheat seedlings, there are still more control measures. First, water in arid and frozen plots to provide sufficient water for wheat seedlings. Second, with the use of pesticides, the yellowing of wheat seedlings may be caused by pests and diseases.

If the plot is too dry, it should be watered in time to promote the normal growth of wheat seedlings. Or the density is too dense to cause seed grabbing, to carry out artificial seedling, in order to increase ventilation and light transmittance, deep ploughing and broken roots to reduce water and fertilizer absorption, and promote the growth of strong seedlings.

I believe that the weak yellowing of wheat seedlings is caused by a lack of chemical fertilizers, and in this case, the wheat should be fertilized immediately to allow the wheat to thrive.

Wheat seedlings yellow seedlings are weak, which will have a great impact on the yield of wheat, the effective distribution of wheat weak seedlings is less, and can not form enough effective ears, in the early stage, you can wait until the seedlings grow to about 3 leaves and 1 heart (about 25 35 days after sowing) for post-sowing suppression, at this time to suppress, the water and fertilizer retention of the soil will be much better. The suppressed seedlings will undergo secondary rooting at the place of tillering, which can promote multi-tillering.

<>1. Deficiency of nutrients seedling yellow: Foot fertilizer should be applied before planting, and targeted fertilizer should be supplemented after the deficiency of nutrients to promote the recovery of seedlings as soon as possible. 2. Sowing too deeply:

Peel off part of the soil on the seeds, and then combine with cultivating to improve the permeability of the soil, so as to promote the germination of lateral roots of wheat seedlings. 3. Growing too densely: For the wheat field that grows too densely, artificial thinning can be carried out to improve the permeability of the field, slow down the growth rate of wheat seedlings, and water properly when the field is short of water.

4. Disease and fertilizer damage: when root rot occurs, irrigate the roots with 800-1000 times of 70% methyl tobuzin wettable powder, and dilute the fertilizer with water when fertilizer damage occurs.

1. What is the way for wheat seedlings to turn yellow and die

1. Lack of nutrients and seedling yellow.

Before planting, foot fertilizer should be applied to meet the nutritional needs of seedlings during growth and development, and targeted fertilizer should be supplemented after the occurrence of nutrient deficiency to promote the recovery of seedlings as soon as possible.

2. Sowing too deeply:

Peel off part of the soil above the seeds to make the mulch soil thinner, and then combine with tillage to improve the permeability of the soil, promote the germination of the lateral roots of the seedlings, and make the wheat seedlings stronger.

3. Growing too densely.

1) Artificial thinning of seedlings in the over-dense wheat field to improve the ventilation and light transmittance of the field and slow down the growth rate of wheat seedlings.

2) Proper deep ploughing and root breaking, inhibiting the absorption of water and nutrients by wheat seedlings, so as to control tillering and avoid excessive growth of plants.

3) If the field is dry, it needs to be watered in time.

4. Disease and fertilizer.

When root rot occurs, 70% methyl tobuzin wettable powder can be used 800-1000 times liquid along the ridge to irrigate the roots, and when fertilizer damage occurs, water can be poured to dilute the fertilizer.

2. What is the cause of the yellowing and death of wheat seedlings?

1. Lack of nutrients. 1) Wheat in the seedling stage lacks nitrogen, phosphorus, potassium and other elements.

2) When nitrogen is deficient, the plant shows dwarf and weak, few and weak tillers, and the leaves lose green and yellow, and in severe cases, chlorophyll decreases or even disappears, resulting in leaf tip wilting and old leaves yellowing and falling.

3) When phosphorus is deficient, the secondary roots of the seedlings are reduced, the tillers are less, the leaves are dark green, and the leaf tips are yellow.

4) When potassium is deficient, the tips of the old leaves begin to develop disease, then extend down along the veins of the leaves, and finally the plants will lodging to the ground.

2. Sowing too deeply:

Sowing too deep causes the seeds to consume a lot of nutrients when they are unearthed, and the leaves are slender, the root system is poorly developed, and the seedlings grow thin and yellow.

3. Growing too densely.

1) The field with too early sowing and a large amount of seeds is generally prone to the situation that the wheat seedlings and oranges grow too densely, which will make the permeability of the field poor and affect the development of wheat seedlings.

2) When the field is relatively dry, the secondary roots of wheat seedlings are less, tillering is difficult, and the leaves turn yellow and gradually dry up due to lack of water.

4. Disease and fertilizer.

1) The occurrence of root rot will cause the wheat seedlings to turn yellow, and in severe cases, the wheat seedlings will die and the roots will rot.

2) Failure to use well-rotted organic fertilizer, or the seeds and seedlings are burned due to contact with fertilizer, resulting in yellowing of leaves and leaf tips.

Some farmers reacted that the wheat seedlings that emerged had turned yellow, and when they saw that the wheat seedlings in their fields had turned yellow, the farmers were very worried and did not know why this happened, which not only affected the quality of the wheat, but may even lead to non-production. Let's introduce farmers to the causes of yellowing of wheat seedlings and related control methods.

1. Excessive soil moisture can lead to.

Many areas of Henan have experienced heavy rainfall this year, and the soil is relatively moist. When wheat is sown, the soil moisture is high, there is little oxygen, and the seeds cannot breathe properly. In the process of germination and emergence, it will be affected to a certain extent, some can not emerge, and some will turn yellow after emergence.

There are also two cases here. First, before wheat is sown, the soil moisture is high. The correct thing to do is to wait a few more days before planting, but depending on the weather forecast, there will be rain and a cooling temperature, so sow in the soil with high humidity in advance.

Secondly, after the wheat is sown, it encounters rainy weather and lasts for a long time, and the wheat will also turn yellow after emergence.

Second, the problem of sowing seeds and fertilizers together.

In recent years, the popularity of seeds and fertilizers sown together has become more and more widespread, and it is more and more recognized by farmers for saving labor at one time. With the correct operation of seed and fertilizer sowing, there are no problems with the emergence and growth of wheat. However, there are exceptions.

For example, in the process of sowing seeds and fertilizers together, due to machine problems or lack of mechanical experience, the distance between seeds and fertilizers is too small (less than 3 cm), and even some fertilizers directly cover the seeds, resulting in the phenomenon of "seedling burning". In this case, it will cause the wheat to turn yellow after emergence. In severe cases, wheat seedlings cannot emerge, and many broken ridges occur due to lack of seedlings.

3. Cooling. When sowing wheat, the temperature is still suitable, basically in the range of 10 to 20 degrees, which is conducive to wheat germination and emergence. However, when the temperature suddenly drops to about 5 degrees, not only will the wheat not be able to emerge, but even if it does, it will easily turn yellow and form weak seedlings. Take Henan Henan as an example.

On October 15, the temperature was still 14-25 degrees, and by October 17 it had dropped to 5-14 degrees, dropping by more than 10 degrees in one day. In case of such severe cooling weather, and the low temperature weather lasts for a long time, the probability of wheat emergence and yellowing will increase.

Fourth, the hazards of herbicides.

The herbicide damage mentioned here refers to the drug damage of closed herbicides, not the drug damage of herbicides after emergence. After all, wheat has just been planted, and post-emergence herbicides have no effect, and farmers will not do so. From the actual planting process, the spraying of closed herbicides on wheat is rare, but it also exists.

A small number of farmers choose to spray a sealing herbicide after wheat planting to reduce the growth of weeds in the field. However, in the process of spraying closed herbicides, due to the lack of rigorous spraying methods or excessive spraying doses, it will also lead to the yellowing of wheat after emergence, and in severe cases, it will also lead to wheat seedling failure.