Is soil acidification harmful to crops?

Soil acidification is harmful to crops, mainly reflected in:

1. The change of soil acidity refers to the change of hydrogen ion concentration in the soil, while soil acidification is the process of increasing hydrogen ions in the soil, or the process of soil acidity changing from low to high. Soil acidification in China mainly occurs in acidic soils in the south, and there are also serious acidification in protected areas and high-yield fruit tree areas in the north.

2. The root cause of soil acidification lies in the increase of hydrogen ions in the soil.

1) The amount of acid rain is large and concentrated, the leaching effect is strong, and a large amount of alkaline salt groups such as calcium, magnesium and potassium are lost, which is one of the reasons for soil acidification;

2) The lack of traditional agricultural measures such as the application of organic fertilizer and the imbalance of soil nutrients in cultivated land are one of the causes of soil acidification.

3) Long-term application of a large number of acidic fertilizers, especially physiological acidic salts, is an important cause of soil acidification. Long-term use of chemical fertilizers for many years will cause the remaining acid roots after crop absorption to combine with hydrogen ions in the soil to form acid, which will lead to soil compaction, increased acidity, and destruction of soil structure.

Soil acidification inhibits root development: soil acidification can aggravate soil compaction, make it difficult to stretch roots, weak root development, difficult to slow down seedlings, easy to form old and young trees, old stiff seedlings, poor root development, reduced absorption function, weak growth, and reduced yield. Soil acidification aggravates pesticide waste:

In acidified soil, the growth of plants is weakened, the disease resistance is reduced, and they are easily infected by diseases, so they have to increase the amount of pesticides.

Soil acidification can lead to very low absorption and utilization of most medium and trace elements. Soil acidification leads to serious fertilizer loss, and the fertilizer utilization rate is less than 30%!

Soil acidity not only causes the loss of 70% of nitrogen, but also makes 60-80% of the phosphorus and potassium components that are easy to generate insoluble substances can not be absorbed, coupled with acidity leads to weak root growth and low nutrient self-absorption and utilization rate, which leads to a large number of chemical fertilizers, but crops grow slowly, there are many diseases, low yield, poor quality, resulting in increased inputs, and greatly reduced benefits.

Soil acidification can lead to: crop malnutrition, serious nutrient deficiency, such as apple bitter pox, red spots, nodules, clumps of leaves, mosaic leaves, fruit rust and pear iron heads, spots, chicken paw prints and other deficiencies and viruses occur frequently.

The soil is too acidic, containing a large amount of aluminum ions, after the plant is absorbed, it will grow poorly, and the plant will be in the strong acidic soil for a long time, and the unsuitable growth medium can cause the plant to die. After the soil is acidified, chemicals such as quicklime and calcium chloride can be used to improve the soil. Before planting plants, it is necessary to use suitable soil to avoid damaging the root system of the plants.

Soil is an important substance for plant growth, which can be used to grow plants, and is generally composed of a variety of substances such as granular soil, humus and organic matter, and the soil is divided into acidic soil, neutral soil and alkaline soil. The soil is rich in nutrients and humus, which is beneficial to the growth of plants, but the soil is too acidic, which will affect the growth of plants and can seriously cause plant death.

Soil acidity refers to a decrease in the pH of the soil, such as acid rain, which can enhance the acidity of the soil. Acidic soil contains a large amount of aluminum ions, after the plant is absorbed, it will grow poorly, and the root system of the plant is easily damaged in the strong acidic soil for a long time, which can seriously cause plant death. Excessively acidic soil can make the growth of plants worse and can also induce pests and diseases.

The soil is mainly divided into three categories, sandy soil, loam soil and clay soil, sandy soil contains a large amount of sand, the soil is particle-rich, the drainage performance is good, and the air permeability is strong. Loam soil is the soil commonly used by ornamental plants, the soil is more delicate, the soil is soft, and the sand content is average. The loam soil has good water and fertilizer retention ability, and the air permeability and drainage energy are average.

Clayey soils contain very little sand, the soil is fine, the drainage capacity is poor, and the speed is slow. The soil of clayey soil has good water retention performance, but the soil has poor air permeability, which is suitable for growing crops. When planting plants, it is necessary to use suitable soil for planting and breeding according to the root system of the plant, so as to avoid the unsuitable substrate affecting the root system of the plant.

Only understand that soil salinization is harmful, but do not think that soil acidification is not good. What are the effects of soil acidification? What causes soil acidification?

How to improve the alkalized soil layer? In recent years, soil acidification has become more and more serious. We know that alkaline soils are not good for crop cultivation, and similarly, acidic soils are not good.

The growth and development of grain crops is most suitable for neutral soil layer and slightly acidic soil, and the harm of acidic soil is relatively large. First, after soil acidification, the effectiveness of chemical fertilizers is greatly reduced, and <>

The nutrients in the light fertilizer can not be digested and absorbed by the soil, so it cannot be absorbed by the crop. Severe alkalinization makes phosphorus deficiency after phosphorus application and low potassium after potassium application, and also reduces the effectiveness of calcium and magnesium medium elements and boron, molybdenum nutrients and other chemical components. The nutrients in the chemical fertilizer cannot be digested, absorbed and used, and finally it seems that there is still a shortage of fertilizer after fertilization, and it cannot promote the growth and development of crops as if it is not fertilized.

The second is that after soil acidification, manganese ions in the soil

Harmful elements such as aluminum ions become active, causing the poisoning of crop rhizomes and the death of plants. Third, under the acidic environmental standard, the microbial strains such as pathogens in the soil are reduced, and the harmful bacteria are increased, which in turn leads to the further aggravation of food crop diseases. The wrong way of watering will also cause the alkalinization of the soil environment, and many alkali cation components, due to unreasonable flood washing, or continuous heavy rain, so that the soil and water in the field are often fluid, and nutrients will also flow out.

Naturally, when it comes to how to solve alkalization, <>

In our village, everyone uses agricultural fertilizer, and it is enough to use jacks on one acre of land, and carry out deep ploughing in the futureCareful cropping, so that the lack of elements in the soil can be filled, after all, the nutrients contained in organic fertilizer are very comprehensive. Naturally, everyone will continue to use lime powder, after all, this is acidic, and the amount of land used per mu will continue to be distinguished according to the pH value, generally 50-100kg, so that it can have a buffering effect of pH value. In order for the soil layer to be used sustainably, it is also necessary to shape the appropriate planting and irrigation techniques, so that the soil layer can have higher fertilizer efficiency.

With the development of agricultural production, crop yield has increased significantly, and long-season cultivation and off-season cultivation have been realized, resulting in a great increase in the uptake of soil nutrients by crops. The concentrated erosion of rainwater in the rainy season, or the way of flood irrigation, causes the leaching to intensify, resulting in a large loss of alkaline salt bases such as calcium and magnesium, which is the main cause of soil acidification. Chemicals regulate the pH value, such as applying some alkaline substances to reduce the acidity of the soil through neutralization reactions, such as applying an appropriate amount of quicklime, alkali residue, calcium chloride, etc.

Increase the application of fully decomposed organic fertilizer, organic fertilizer contains a large amount of organic matter, has a very large buffer, can adjust the acidity and alkalinity of the soil, improve the soil environment.

Caused by excessive soil consumption, incorrect irrigation methods, and fertilization, it is necessary to fertilize reasonably and pay attention to the rotation of land.

It's very likely that you are watering in the wrong way, it is possible that the soil is over-consumed and planted too often, which eventually leads to soil and barrenness. At this time, it is necessary to eat chicken fat appropriately, and it should also be fully stirred with the soil.

Excessive soil depletion. With the development of agricultural production, crop yield has increased significantly, and long-season cultivation and off-season cultivation have been realized, resulting in a great increase in the uptake of soil nutrients by crops.

Crops absorb a lot of nutrients from the soil during their growth. These include alkaline ions such as calcium, magnesium and potassium, which completely escape from the field after the crop is harvested, and can lead to soil oxidation if the field is not replenished in time. Therefore, unreasonable right and wrong or insufficient nutrients are also one of the important causes of soil oxidation.

When the soil is in a high temperature and humidity environment, the organic matter in the soil will produce anaerobic fermentation, which will intensify the oxidation of the soil. After the soil hardens.

Microorganisms in the soil convert sulfur in the soil into sulfuric acid and chlorine in the soil into hydrochloric acid, thereby increasing the acidity of the soil. Low soil organic matter levels reduce the soil's buffering capacity, which is not effective at conserving and diluting various acidic ions, and can actually exacerbate signs of acidification. With the development of agricultural production, crop yields have risen sharply, long-term planting and off-season planting, crops' intake of nutrients has increased significantly, and some soils have been consuming nutrients all year round.

* Soil is unable to restore nutrient balance, resulting in * poor soil and acidification. In order to increase crop yields, chemical fertilizers are indispensable for agricultural production. However, some growers use chemical fertilizers inappropriately, using a large number of acidic fertilizers, nitrogen fertilizers, etc., which not only affects soil oxidation, but also affects the organic matter of the soil, and weakens the buffering capacity of the soil.

Acid rain caused by air pollution also plays a role in soil acidification. When nitrogen fertilizer is used excessively, nitrogen fertilizer is converted to nitrate during decomposition, during nitrate loss.

Taking away a large amount of calcium and magnesium ions from the soil, it causes the soil to oxidize, so the cause of soil oxidation is nitrogen fertilizer. Precipitation, concentration, flood water supply can also wash away the calcium, magnesium, potassium and other alkaline ions in the soil, and the residual hydrogen ions combine with sulfate plasma, resulting in soil oxidation, so unreasonable watering in the process of agricultural planting management, especially excessive watering, is also one of the main causes of soil oxidation. In the process of absorbing nutrients, the roots of plants secrete acidic substances.

This may be due to erosion by acid rain or due to the high frequency of fertilization of the soil, which can lead to soil acidification. It can cause nutrient loss of the soil, it can lead to poor soil, it can lead to soil damage, it can also lead to the destruction of the soil quality, and it can also lead to the loss of nutrients from crops.

Because the soil is degraded and not maintained in time, plant growth is inhibited. The specific harm is that it will lead to a large reduction in crop yield, will also lead to poor root development of crops, will lead to low absorption and utilization of nutrients by plants, will also reduce the content of soil organic matter, and affect the ecological environment.

1. Excessive application of nitrogen fertilizer, and the structure of fertilizer indiscriminate sales is unreasonable.

The utilization rate of nitrogen fertilizer by plants is only 30 50, and excess nitrogen fertilizer is converted into nitrate in the soil due to nitrification, forming H+, which leads to soil acidification and salinization. At the same time, in the structure of chemical fertilizer, the ratio of N, P and K is unreasonable, and the input of medium and trace elements such as calcium and magnesium is also relatively insufficient, resulting in soil nutrient imbalance, so that the calcium, magnesium and other elements in the soil colloids of Zhaozheng are easily replaced by hydrogen ions, so that the pH value of the soil decreases rapidly.

2. Do not pay attention to the application of organic fertilizer and microbial fertilizer.

Insufficient application of organic fertilizer will affect the number and activity of microorganisms, humus in the soil is the main form of soil organic matter, humus itself has a negative charge, can adsorb excess cations, and has a buffering effect on the acidity and alkalinity of the soil. If the humus content in the soil decreases sharply, the formation of aggregate structure is hindered, the soil structure is damaged, the soil acidification is aggravated, the soil compaction is caused, and the soil fertility is seriously reduced.

3. Irrigation and drainage are unreasonable.

Large, concentrated and flooded watering will also cause the calcium, magnesium, potassium and other base ions in the soil to be washed away, and the residual hydrogen ions and sulfate ions will combine, resulting in soil acidification.

4. Acid rain caused by industrial pollution.

Waste gases, waste residues, and wastewater generated by industry can directly or indirectly lead to soil acidification. The combustion of coal, natural gas, oil, the emission of automobile exhaust, SO2, NO and other gases into the atmosphere will be oxidized to form sulfuric acid and nitric acid, and with the rain, acid rain will be formed, which will lead to an increase in the content of acidic substances in the soil.

What causes soil acidification? How should I fix this?

The process by which the soil absorbent complex receives a certain amount of exchangeable hydrogen or aluminum ions, causing the leaching of alkaline (salt-based) ions in the soil.

Acidification is an important aspect of the process of soil weathering, which leads to the reduction of pH value, the formation of acidic soil, affects the activity of organisms in the soil, changes the form of nutrients in the soil, reduces the availability of nutrients, and promotes the dissolution of free manganese and aluminum ions into the soil solution, which has a toxic effect on crops.

1. The precipitation is large and concentrated, the leaching effect is strong, and a large amount of alkaline salt groups such as calcium, mold, and potassium are lost, which is the fundamental cause of soil acidification.

2. The lack of traditional agricultural measures such as lime application, fire manure, and organic fertilizer application makes the imbalance of soil nutrients in cultivated land the main cause of soil acidification.

3. Long-term application of a large amount of chemical fertilizer is an important cause of soil acidification, that is, long-term application of urea also causes soil acidification.