What is the reason why cultivated loose soil can promote the absorption of inorganic salts?

Loosening the soil promotes the respiration of root cells.

Purpose: Mainly to loosen the surface soil, generally combined with weeding, after rainfall, irrigation and soil compaction. In the nursery industry in North America, cultivated seedlings in the field are mostly cultivated and hoeed, which not only plays the role of loosening the soil and weeding, but also avoids the pollution of the environment by using herbicides.

Function: It is topsoil tillage between the rows during the growth period of crops. Tools such as hand hoes, cultivators, tooth rakes and various cultivators can be used.

Cultivating can loosen the topsoil, increase soil aeration, increase ground temperature, promote aerobic microbial activity and nutrient effectiveness, remove weeds, promote root extension, and regulate soil moisture.

Principles and methods of cultivating.

The timing and frequency of tillage varies depending on crop species, seedling condition, weeds, and soil conditions. Generally, dryland crops are carried out at the seedling stage and before the canopy closure, and rice is carried out at the tillering stage. A crop is cultivated about 3 to 4 times.

If the crop growth period is long, the closure is late, there are many weeds in the field, and the soil is heavy, the number of tillage can be increased to keep the ground loose and free of weeds.

During the growth period of crops, the principle of shallow-deep-shallow should be mastered in the depth of cultivation. That is, the seedling stage of crops should be shallow, so as not to hurt the roots; The middle growth stage should be deepened to promote root development; In the late growth stage, the crop should be shallow before the closure, and the main thing is broken and compacted.

Loosen soil to absorb cropsInorganic saltsIons have a good promoting effect, and the most direct reason is that the loose soil promotes the root cellsRespiration

Loosening soil can increase the air content in the soil, strengthen the cellular respiration of roots, and increase the formation of ATP. The absorption of mineral ions by the root is active transport.

Energy is consumed, so loosening promotes the absorption of mineral element ions.

The specific role of cultivators.

1. Increase soil aeration. As crops grow, they continuously consume oxygen and release carbon dioxide.

The oxygen content of the soil is constantly decreasing. After cultivating and loosening the soil, the oxygen in the atmosphere continues to enter the soil layer, and carbon dioxide is continuously discharged from the soil layer, so the respiration of crops is vigorous, and the absorption capacity is strengthened, so that they can grow luxuriantly.

2. Increase the content of available nutrients in the soil. The organic matter and mineral nutrients in the soil must be decomposed by soil microorganisms before they can be absorbed and utilized by crops. After cultivating and loosening the soil, soil microorganisms are active due to sufficient oxygen, which decomposes and releases a large number of potential nutrients in the soil, and improves the utilization rate of soil nutrients.

3. Adjust soil moisture content. Cultivating in drought can cut off the capillary of the soil surface, reduce the transport of soil moisture to the soil surface, reduce evaporation and loss, and improve the drought resistance of the soil.

The stems absorb inorganic salts from the soil

First of allThe stems are not in direct contact with the soil, soThe part of the inorganic salt it absorbs does not come from the soil for the first time, butThe roots of the plant absorb water and inorganic salts from the soil in the soil, and after absorption, they are transported to the various organs of the plant through the stem, and the stem absorbs a part of the water and inorganic salts absorbed by the roots from the soil during transportation.

The stem of the plant has the function of transporting nutrients, intellectuals and water, as well as supporting leaves, flowers and fruits in a certain space. Some stems also have the functions of photosynthesis, nutrient storage and sock propagation.

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The main function of loose soil is permeable aeration. The loose soil is easy to flow water, which is conducive to the exchange of materials between plants and soil. The entry of air into the loose soil gap not only facilitates the aerobic respiration of the roots, but also inhibits the activity of denitrifying bacteria and prevents the loss of nitrogen fertilizer denitrification. At the same time, loosening soil can also reduce the resistance to root growth, cut off the hair cell duct on the surface, and reduce the evaporation and loss of soil moisture through the soil surface.

Does loosening the soil or fertilizing too much affect the absorption of inorganic salts by the roots?

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Loosening the soil or fertilizing too much will affect the absorption of inorganic salts by the roots, and the main role of loose soil is permeability and aeration. The water in the loose soil is easy to flow, which is conducive to the material exchange between plants and soil. The inflow of air into the loose soil fiber ridge gap is not only conducive to the aerobic respiration of roots, but also inhibits the activities of denitrifying bacteria and prevents the loss of nitrogen fertilizer denitrification. At the same time, loosening soil can also reduce the resistance to root growth, cut off the hair cell duct on the surface, and reduce the evaporation and loss of soil moisture through the soil surface.

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Summary. No, it is harmful, secondly, the harm is mainly due to the concentration of the solution in the soil, which leads to the loss of water in the roots of the plant, and the plant cannot absorb water, and it will slowly wither. If plants do not exist, there is no organic matter to be made for animals, and the animals of nature and soil will leave or die, and just as people do not drink seawater, the more they drink, the thirstier they become, and animals will not be able to find the water necessary for life in the salty soil.

No, it is dangerous, secondly, the harm is mainly to plants, the concentration of dissolved cherry attack liquid in the soil is too large, resulting in water loss of plant roots, and plants can not absorb water, and they will slowly wither. If plants do not exist, there is no organic matter to be made for animals, and the animals of nature and soil will leave or die, and just as people do not drink seawater, the more they drink, the thirstier they become, and animals will not be able to find the water necessary for life in the salty soil.

I'm still a little confused, can you be more detailed?

No, it is harmful, secondly, the harm is mainly due to the concentration of the solution in the soil, which leads to the loss of water in the roots of the plant, and the plant cannot absorb water, and it will slowly wither. If plants do not exist, there will be no organic dust benches to provide for animals, and the animals of nature and soil will leave or die, and even if brothers and brothers do not drink seawater, the more they drink, the thirstier they become, and the animals cannot find the necessary water for life in the salty soil.

Water is the raw material for photosynthesis, and transpiration requires water, which is an important component of plants, so that plants maintain a stiff and upright posture, so plants need water for their lives; Inorganic salts can regulate the pH value in the plant, maintain normal osmotic pressure, constitute plant cells, and promote the growth of plants, so the growth of plants also needs to regret inorganic salts Inorganic salts are mainly absorbed from the soil through roots and inorganic salts Inorganic salts must be dissolved in water before they can be absorbed and utilized by roots

Therefore, the answer is: inorganic salts; Wu Junyu; water

Water and inorganic salts absorbed by the roots from the soil.

This is not a sentence, it is a phrase (phrase) with a partial structure.

From a botanical point of view, the water and inorganic salts (that is, fertilizer) required by the plant are indeed absorbed from the roots, and the inorganic salts dissolved in the water are indeed absorbed.

So this statement is correct.

Why the source of loose soil at the right time.

BAI enhances soil inorganic salt content.

DU about the growth of plants, mainly the respiration, photosynthesis and transpiration of plants, because the air in the soil is not very much, proper loosening of the soil can increase the air of the soil, which is conducive to the respiration of plants. When transplanting plants, some leaves of plants can be appropriately reduced, which can weaken the transpiration of plants and reduce water loss. Reasonable dense planting of crops can enhance the photosynthesis of plants.

This question examines the application of the principle of plant photosynthesis and respiration in agricultural production, and if you want to improve the yield of crops, you must find a way to promote photosynthesis and inhibit respiration Answer: The principle of photosynthesis in plants is to use light energy in chloroplasts to synthesize carbon dioxide and water into organic matter and release oxygen.

First, the absorption process of inorganic salts must be accompanied by the absorption and transport of water. In winter, due to the lack of transpiration pull from the canopy, the plants absorb less water and less inorganic salts.

Second, after inorganic salts are absorbed into the plant body, they can form compounds in the cell and maintain the life activities of the cell. In winter, plants do not need to build a large number of cells, such as N, K, P, MG, etc., which are related to the formation of leaves and flowers, and the need for these elements is less.

As a result, the uptake of inorganic salts by winter plants is also reduced.

For the temperate region of China, winter is the period of plant dormancy, its physiological activities are very slow or even close to stopping, and the absorption of water is very small, so there are very few inorganic salts that enter the plant with the absorption of water. However, for tropical areas, such as Fujian, Liangguang, Hainan, Yunnan and other places, they are basically evergreen all year round, and there is no reduction in the absorption of inorganic salts by plants in winter or it is very insignificant. In other regions, such as South Africa and Namibia, where the summer is hot and dry during the dry season and the winter is cool and rainy, most plants grow in winter (rainy season) and dormant in summer, so the opposite is true, the uptake of inorganic salts by plants decreases in summer and increases in winter.

In winter, the growth rate of plants slows down, and their respiration intensity is relatively slow, and the demand for water and nutrients (including inorganic salts) is also reduced.

The roots of the plant breathe the oxygen in the air Frequent loosening of the soil 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 If the soil is compacted, the air in the soil crevices is reduced, which inhibits the respiration of the roots and also inhibits the growth of the roots

Therefore, ACD