Plants still show symptoms of water deprivation after flooding, why?

After the plant is waterlogged, the leaves show water shortage, such as wilting or yellowing, because the soil is full of water, which can weaken cellular respiration in a short period of time, and the generation of root pressure is affected, thus hindering water absorption; Long-term waterlogging will lead to the formation of anaerobic respiration in the roots, which will produce and accumulate more ethanol, resulting in root poisoning, less water absorption, leaf wilting and deterioration, and even plant death.

Crops also show symptoms of water deficiency in waterlogged or flooded situations, mainly due to poor soil aeration, which inhibits water absorption by the roots.

The main reasons for the difficulty of root water absorption caused by poor soil aeration are: O2 deficiency in the root environment, CO2 accumulation, and inhibition of respiration, which affect the root water absorption; For a long period of hypoxia, the roots undergo anaerobic respiration, which produces and accumulates more ethanol, and the roots are poisoned and injured, and absorb less water; The soil is in a reduced state, coupled with the activity of soil microorganisms, which produces some toxic substances, which are not conducive to the growth and development of the root system.

To put it simply, when the plant is flooded, the respiration of the roots is affected, and the energy to absorb the water is lost, and the plant will be starved of water.

After flooding the plant, the plant cannot respire aerobically, only anaerobic respiration, and the production of ethanol is phytoalcoholism.

If the density of cells in the outside world is greater than the density of the plant's own cells, the plant will lose water, so there will be symptoms of water shortage.

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It can cause the root system to ulcerate and even cause the entire plant to die.

Reason: Plants have been flooded for a long time due to the reduction of oxygen, and plants carry out anaerobic respiration to oxidize and decompose some organic matter into incomplete oxide alcohol, which has a toxic effect on plants, and at the same time releases a small amount of energy, which can not meet the respiratory consumption of plants, resulting in root ulceration and even death.

In the case of terrestrial plants, the roots will soak and rot, which is caused by long-term lack of oxygen.

Plants are often drowned because their roots are deprived of oxygen, the flooded soil is deprived of oxygen, and eventually the plant is "starved to death".

The details are as follows:

Many people raise the orchid at home, and many people will find that the leaves and roots of the orchid are rotten in the process of raising it, which is caused by our excessive watering. First of all, the root system of the orchid is fleshy roots, which is the same as the roots of orchids, and most people will not use orchid soil to plant in their homes, but use a liter of nutrient soil or humus soil.

In this case, if you put it at home, the ventilation is slightly worse, and it does not dry for a long time after watering, or the soil surface is still very wet, you will water, which will lead to the situation of stuffy roots and rotten roots.

In fact, it is very simple to raise a good Junzi orchid, we want it to have a developed root system, it will not dry the roots and will not rot the roots, the potting soil is about halfway dry, and it should be watered thoroughly in time, so that it will not dry the roots and will not rot the roots, it can grow normally, and then raise it according to its habits, it can quickly destroy the laughter and grow new leaves, and quickly go to grow buds and flowers.

The main trunk of the fortune tree is thick, the leaves are long, the meaning is good indoors, and it can also purify the air, it is sold more in the flower market, and there are more people who buy it, but the kind of fortune tree we buy is cultivated with garden soil, as long as it is found in the family that the leaves are rotten and the leaves are falling, etc., and even the situation of the rotten trunk will occur, which is due to the drowning of the slender watering and watering.

Because the fortune tree is a woody plant, the root system is relatively thick, the trunk can store a lot of water and nutrients, you water too much is easy to rot the roots, especially indoor garden soil cultivation, watering for a long time is not dry, you do not dry and go to watering, then it will not take long to rot.

Plants will be stunted due to lack of water, and the stems and roots will be small and thin, and at the same time, there will be symptoms such as leaf curl, leaf petiole drooping, wilting, flower dropping, fruit dropping, and bud dropping.

After finding that it is short of water, it is necessary to increase the frequency of watering appropriately to replenish its moisture, and you can also spray potassium dihydrogen phosphate of fertile leaves to help it return to normal.

It depends on what kind of plant it is, some plants lack water is the manifestation of yellow leaves, and some plants lack water is the manifestation of the leaves are not very energetic, this difference is not particularly big, succulents lack water is wrinkled leaves.

The flooded plant body, because the water squeezes the air in the soil out of the soil, resulting in a lack of oxygen in the soil, the roots can not get enough oxygen for respiration, so that the life activities of the roots are weakened or even die, the roots can not absorb enough water and inorganic salts from the soil for the use of the plant body, and the plant body will die due to the lack of water and inorganic salts

Therefore, b

The roots of plants breathe oxygen in the air Peichang often loosens the soil, which can loosen the soil, and the air in the soil crevices increases, which is conducive to the respiration of the roots and promotes the growth of the roots After the farmland is flooded, the water squeezes out the air in the soil crevices, so that the oxygen in the soil is too little, and the root hairs cannot breathe, causing the roots to rot; Therefore, after the farmland is flooded, it must be drained in time, so that the roots of the plants can quickly get enough oxygen to maintain the normal respiration of the roots

Therefore, c

b analysis: any part of the plant body with living cells must be respirated to produce energy to maintain the needs of life activities The plant body that is flooded, because the water squeezes the air in the soil out of the soil, resulting in a lack of oxygen in the soil, the roots can not get enough oxygen for respiration, so that the life activities of the roots are weakened or even die, and the roots can not absorb enough water and inorganic salts from the soil for the use of the plant body, and the plant body will die due to the lack of water and inorganic salts Therefore, b

When plants are short of water, plant cells lose water, turgor pressure drops, leaves and young stems droop, and wilts appear. Wilting does not necessarily mean that the plant will die, and there are two types of wilting: one is temporary wilting.

This wilting often occurs in the middle of summer when the temperature is high and the humidity is low, and even if there is available water in the soil, it will be in short supply due to strong transpiration, and wilting will occur. If this wilting state is under the external conditions of falling temperature, humidity and transpiration, the plant can return to its original state. The other is permanent wilting.

In the above case, if the evapiration is reduced, the wilted plant still cannot be restored to normal, such wilting is called permanent wilting, permanent wilting is essentially the water potential of the soil is equal to or lower than the water potential of the plant roots, and the plant roots can not absorb water from the soil, and can only increase the available water in the soil and improve the soil water potential to eliminate wilting. Permanent wilting, if persistent, can cause plant death.

In agricultural production, people increase the air content in the soil by cultivating and loosening the soil, timely drainage and other methods, and promote the respiration of plant roots to ensure the normal life of plants After flooding, the lack of air in the soil makes the roots unable to breathe normally and the water absorption decreases, and the plants show missing symptoms Therefore, the plants after flooding show symptoms of water shortage, because the roots are hypoxic, the respiration is reduced, and the water absorption is reduced

Therefore, b