The important role of soil organic matter? Why should soil organic matter be improved? Soil organic matter is the most active part of soil, the most important basis for soil fertility, and one of the important indicators for measuring soil fertility. It is an important part of the soil, not only an important source of plant nutrition, but also an energy source for microbial life and activities. Yue Ge Fertilizer Network will learn about relevant knowledge with everyone!

Soil organic matter refers to carbon-containing organic compounds in various forms in the soil. It refers to the life-derived substances in the soil. It is a substance other than soil minerals in the soil. It is the most active part of the soil and is the soil fertility. Foundation is one of the important indicators to measure soil fertility. It can be said that there is no soil fertility without soil organic matter. Soil organic matter has seven major effects on soil fertility.

1. It is the main source of soil nutrients.

The organic matter contains various nutrients needed for crop growth, and can provide carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and various trace elements for crop growth directly or simply. In particular, more than 95% of carbon and nitrogen in the soil are present in the soil in an organic state.

Because soil minerals generally do not contain nitrogen, in addition to the applied nitrogen fertilizer, the main source of soil nitrogen is provided after the decomposition of organic matter. Carbon dioxide and small molecular carbon-containing compounds produced by the decomposition of soil organic matter can be directly supplied to green plants for photosynthesis and root absorption. In addition, organic matter is also an important source of phosphorus, sulfur, calcium, magnesium and trace elements in the soil. Seaweed organic fertilizer has a good nutritional supplement effect!

2. Promote the growth and development of crops.

Humic acid in organic matter can enhance plant respiration, increase cell membrane permeability, and enhance the absorption of nutrients. At the same time, vitamins, humic acids and microbial metabolites in organic matter can promote plant growth and development.

3. Promote the formation of soil structure, improve soil physical properties, and improve soil structure.

Humus (humic acid) in organic matter is the most important cementing agent in soil aggregate structure. Soil organic colloid is an indispensable cementing material for the formation of stable agglomerate structure, so it helps cohesive soil to form a good structure, thus changing soil pores. Condition and water and gas ratio, adjust soil water, fertilizer, gas and heat to create suitable soil tightness.

The viscosity of soil organic matter is much less than the viscosity of clay, only a fraction of the clay. On the one hand, it can reduce the viscosity of sticky soil, reduce the resistance of farming and improve the quality of farming; on the other hand, it can improve the agglomeration of sand and improve its excessive loose state.

4. Improve soil fertility and cushioning performance.

The organic colloid in the soil organic matter, with a large amount of negative charge, has a strong adsorption capacity, can adsorb a large amount of cations and water, and its cation exchange capacity and water absorption rate are several times or even several times larger than the clay particles, so it can Improve the ability of soil to maintain fertilizer and water storage, and at the same time increase the buffering capacity of soil for acid, alkali and salt.

5. Promote soil microbial activities.

Soil organic matter supplies the energy and nutrients required by soil microorganisms, and supplies a good growth environment such as suitable temperature, pH value and carbon-nitrogen ratio of microorganisms, which is beneficial to microbial activities.

6. Increase soil temperature.

The organic matter is darker in color, generally brown to dark brown, and has a strong heat absorption capacity, which can raise the ground temperature. Can improve soil thermal conditions.

7. Improve soil nutrients.

Humus (humic acid) in organic matter has a chelation effect and helps to eliminate soil pollution. For low-yield fields, soil can be fertilized by increasing the organic matter content to increase the level of soil fertility. For high-yield fields, organic matter needs to be continuously replenished due to the continuous decomposition of organic matter. Humic energy forms complexes or chelates with phosphorus, iron, calcium, zinc and other ions, avoids precipitation of poorly soluble phosphates, and increases the amount and activity of effective nutrients.

According to these important properties and effects of soil organic matter, it is not difficult to see that soil with high organic matter content has higher soil fertility level, which not only provides abundant nutrients for crop growth, improves crop growth environment, but also has strong soil water and fertilizer retention capacity. It can reduce the loss of nutrients, save the amount of chemical fertilizer, improve the utilization rate of fertilizer and improve the quality of crops.

In soils with less organic matter, the opposite is true. Therefore, we should do everything possible to increase the application of organic fertilizers and increase the content of soil organic matter in order to fully exert the benefits of chemical fertilizer production and ensure crop yield and quality.

Organic matter is the soil organic matter (humus), which refers to the life-derived substances in the soil, including soil microorganisms and soil animals and their secretions, as well as plant residues and plant secretions in the soil. Organic matter has mineralization and humification.

Fertility

1. Is the main source of soil nutrients;

2. Promote the formation of soil structure, improve soil physical properties, change soil porosity, and improve soil water storage capacity;

3. Increase soil fertility and improve soil cushioning performance;

4. Humus has physiological activity and can promote crop growth and development;

5. Humus has complexation and helps to eliminate soil pollution.

This article URL: The important role of soil organic matter? Why should we improve soil organic matter?

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