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Sun David

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Soil organic matter refers to the material from the soil, is the soil in addition to soil minerals other than the material, it is the most active part of the soil, is the basis of soil fertility, it can be said that there is no soil organic matter without soil fertility.

Soil organic matter refers to the organic compounds in the soil, including carbon compounds, lignin, protein, resin, wax and so on. Soil organic matter is very broad, such as animal and plant and microbial residues, excreta and secretions, waste water and so on. Microbes are the earliest source of soil organic matter.

Soil organic matter content is very different in different soils, high content of up to 20% or more than 30% (such as peat soil, fertile forest soil, etc.), low content of less than 1% or 0.5% (such as desert soil and sand Soil, etc).

What Is The Use Of Soil Organic Matter?

Soil organic matter contains the nutrients needed for plant growth and development, and is also an important source of phosphorus, sulfur, calcium, magnesium and trace elements in soil.

1, To promote crop growth and development.

The humic acid in the organic matter can enhance the plant respiration, improve the permeability of the cell membrane, enhance the absorption of nutrients, while the organic matter in the vitamins and some hormones can promote plant growth and development.

2, Improve the soil structure.

The humic matter in organic matter is the main binder of soil aggregates. On the one hand, it can reduce the viscosity of sticky soil, reduce the cultivation resistance and improve the quality of tillage. On the other hand, it can improve the agglomeration of sand and improve its excess Loose state.

3, To improve the soil water and fertilizer capacity.

Soil organic matter in the organic colloid, has a strong adsorption capacity, it can improve the ability of soil fertilizers and water storage, but also can improve the soil on the acid and alkali buffer.

4, to promote soil microbial activities.

Soil organic matter Supply the energy and nutrients needed by soil microbes, which is beneficial to the activities of microorganisms. The energy and nutrients required for soil microbial life activities are directly and indirectly derived from soil organic matter, and humus can regulate the acid-base reaction of the soil and promote the improvement of the physical properties such as soil structure, which is beneficial to the activities of microorganisms. This promotes the ability of various microorganisms to transform the substance. Soil microbial biomass increased with the increase of soil organic matter mass fraction, and the two had a significant positive correlation. But the soil organic matter mineralization rate is low, so unlike fresh plant residues that will have a rapid stimulating effect on microorganisms, but a lasting and stable to provide energy to micro-organisms.

5, To improve the soil temperature.

Organic matter for the dark material, usually brown to dark brown, heat absorption capacity, can improve the temperature. Can improve the soil heat situation.

6, Improve soil nutrient.

Organic matter in the humus has a complex effect, humus and phosphorus, iron, aluminum ions to form complexes or chelates, to avoid the precipitation of insoluble phosphate, improve the amount of effective nutrients.

7, To promote the physiological activity of plants Humic acid can promote plant physiological activity at a certain concentration.

Humic acid salt solution can change the plant carbohydrate metabolism, promote the accumulation of reducing sugar, improve the osmotic pressure of the cells, thereby enhancing the crop drought resistance. Fulvic acid is also the main ingredient of certain drought-resistant agents.

Can improve the activity of hydrogen peroxide, accelerate seed germination and nutrient absorption, thereby increasing the growth rate.

Can enhance the respiration of crops, increase the permeability of the cell membrane, thereby enhancing its ability to absorb nutrients, and accelerate cell division, enhance root development.

8, To reduce pesticide and heavy metal pollution Humus helps to eliminate pesticide residues and heavy metal pollution in the soil and the toxicity of Al, Mn and Fe in acidic media. In particular, cinnamic acid can make the residue in the soil of certain pesticides, such as DDT, triazepine and other solubility increases, accelerate its leaching of soil, reduce pollution and poison. Humic acid can also be complexed with certain metal ions, due to the water solubility of the complex, leaving the toxic metal ions may be discharged with water, reduce the harm to crops and soil pollution.

Increase soil organic matter measures Soil organic matter is a warehouse that provides nutrient for crop growth and development. It is a large family of soil nutrients. In addition, it is one of the important indicators to determine the standard of soil fat and thin. How to increase and maintain the soil organic matter content, improve the agricultural crop yield, is the main task of agricultural production.

Increase the total biological output. Increase soil organic matter under the premise of increasing production, because the ground part of the output increased, the underground roots also increased, while the corresponding biological creatures also developed, resulting in increased plant and animal residues.

Strive to straw more field. Straw return is directly added to the soil for organic matter. To change the habit of burning straw in the field, because the burning of straw is a waste of organic matter, but also the organic matter into carbon dioxide and air pollution.

Increase the amount of organic fertilizer. Reasonable fertilization, the implementation of organic and inorganic fertilizer with the increasing number of organic residues in the soil.

Reduce the consumption of soil organic matter tonic drugs. For example, to take less tillage, no-till, cover and other measures, its purpose is to reduce and control the supply of soil oxygen, weaken the microbial decomposition activities. Coverage can reduce soil erosion. So as to maintain the soil organic matter in the provision of nutrients at the same time, increase energy, keep the content stable.


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Dahua Group is a state owned manufactory in China, mainly in production of Ammonium Chloride & Soda Ash with annual output of 600,000mts each website:
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MLA Style Citation:
David, Sun "What is Soil Organic Matter ?." What is Soil Organic Matter ?. 28 Feb. 2017 25 Jun. 2018 <>.
APA Style Citation:
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David, Sun "What is Soil Organic Matter ?." What is Soil Organic Matter ?
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