Is humus organic or inorganic in soil? Does it help with plant growth?

With the progress of science and technology, people's planting and management methods are constantly improving, but soil has always been the carrier of planting, so the importance of soil is obvious, so if you want to grow well, you must ensure the fertility of the soil, and the organic matter in the soil determines the fertility of the soil.

Organic matter equals humic acid?

The first thing to know is that organic matter is not equal to humic acid. Some experts believe that the content of lignin determines the content of humic acid, while coal chemical scientists believe that weathered coal and peat contain a large amount of humic acid, and coal humic acid and soil humic acid have similar physical and chemical properties, molecular structure and molecular weight range, and have consistent applicability.

Humic acid is an organic substance caused and accumulated by microbial decomposition and transformation and a series of geochemical processes. exchange, adsorption, complexation, chelation and other effects with metal ions; As a polyelectrolyte in the dispersion system, it has the functions of agglomeration, colloidal solubilization and dispersion. There is also a certain amount of free radicals on the humic acid molecule, which is physiologically active.

According to the solubility and color classification in solvents, humic acid can be divided into fulvic acid, brown humic acid, and black humic acid. Due to the special function of humic acid, it will play its unique role in sand control, soil improvement, urban sewage treatment, ecological agriculture construction, green organic product production, and the development of medicine and health products.

What are the functions of humic acid?

Humic acid is a soil amendment. With the improvement of people's living standards and the change of lifestyle, more and more farmers do not like to use dirty and smelly farm fertilizer. The soil structure will be destroyed for a long time, so the importance of humic acid is reflected.

Humic acid can promote the formation of soil aggregate structure, reduce soil bulk density, increase cation substitution, and adjust soil alkalinity, thereby contributing to the improvement of soil water and fertilizer retention capacity.

Moreover, because humic acid is a kind of polymer organic matter, it can provide sufficient energy for soil microorganisms after entering the soil, promote the metabolism and reproduction of microorganisms, increase the number of microorganisms, and enhance the microorganisms in the soil, which is particularly important for soil improvement.

Humic acid is a synergist for fertilizers. Nitrogen, phosphorus and potassium fertilizers play a great role in improving the quality of agricultural products, while humic acid can effectively increase the use of nitrogen, phosphorus and potassium, thereby solving the cost of fertilization.

I think all of a sudden rot is wine, because it secretes some really good fertilizer and so on, and we can make these plants grow better and absorb these nutrients.

It's organic. Of course they are helpful, they are a lot of fertility for the soil and provide a lot of nutrients for the growth of plants.

1. Increase the application of organic fertilizer. Farmers have always had the habit of applying organic fertilizer, and there are many types and quantities of application, such as: manure, compost, manure, grass, young branches and leaves, cake fertilizer, fish fertilizer, etc., among which manure and manure are the main organic fertilizers commonly used.

This should encourage farmers to vigorously develop organic fertilizer while vigorously developing animal husbandry. On the basis of increasing organic fertilizer, the use of Aonong microbial agent to improve the soil environment, solve the problems of soil compaction, salinization and acidification, improve soil fertility and water retention capacity.

2. Straw returning to the field, straw returning directly to the field is an effective measure to increase soil organic matter and improve crop yield. Crop straw contains more cellulose and lignin, and in the process of decomposition, humification is slower than that of leguminous plants, but more humus can be formed. For soils with more nitrogen, the effect of straw returning is better.

When straw is returned to the field, fast-acting nitrogen fertilizer should be appropriately applied, otherwise the straw will be decomposed slowly or the crop will produce nitrogen deficiency in yellow seedlings despite decomposition. When returning straw to the field, the straw or manure of gramineous plants is mixed, which can accelerate the decomposition of residues, accumulate humus and prevent the occurrence of nitrogen deficiency in crops, which is better than the yield increase effect of gramineous straw or leguminous straw alone.

3. Plant green manure crops. The planting of green manure and the rotation of green manure and grain crops have always been an important fertilizer source used to replenish soil organic matter in China's agricultural production. Green manure has high yield, high organic matter mass fraction, rich nutrients, fast decomposition, rapid formation of humus, and continuous renewal of soil humus.

In order to provide more humus fertilizer for the soil, the first thing is to use farm fertilizer as much as possible, and secondly, it is best to bury as much plant leaf litter and weeds in the soil as possible, so that it can increase the humus of the soil after it decays.

Humus. It will not be directly absorbed by plants. Its essence is organic nitrogen, which is absorbed after decomposition, so organic fertilizer is a base fertilizer and has a slow-release effect.

Soils can be divided into organic soil and mineral soil according to the organic matter content. Organic soil is generally found only in wetlands and swamps, where the rate of degradation is extremely slow. Organic soil looks like decaying organic matter, is very dark, and has no obvious mineral structure.

And in many cases the soil is mineral soil. The organic matter content in mineral soils generally does not exceed 10%, and most ranges from 1% to 5%. So less than 2% organic matter is the normal content.

And 5% soil organic matter is considered a very fertile level of organic matter. Before fertilizing, the soil is tested to see how much nutrients are present in the soil, including pH.

Mineral content, etc., so that it can be targeted, and it is best to adjust and fertilize according to the actual situation.

In addition to minerals, soil is also composed of humus, interstitial water, interstitial air, etc. It can be said that sand is just inorganic.

The mixture, and the soil is a mixture of organic and inorganic matter, the soil humus content is an important indicator of soil fertility, and the quality of soil humus is for all kinds of soil inlay, humus refers to the soil rich in humus. What is humus? It is the residue of the decay of the stems and leaves of the plant.

Therefore, this kind of soil needs to be found in the forest and by the ditch, and the surface soil should be collected in areas with dense barren grass or fallen leaves, and it is better to collect it together with the surface humus.

The organic matter contained in organic fertilizer is similar to the nature of naturally formed humus in the soil, so organic fertilizer can play a role in water and fertilizer retention, improve soil porosity, and improve soil microbial activity. After a long period of wind and rain, large rocks become small stones or debris, and then continue to weather, detritus becomes soil, plus the corrosion of other plants and animals on the rocks, it increases the nutrients of the soil, and the soil with nutrients can be better conducive to the growth of plants.

The humus in the soil is organic matter. It is beneficial, and the presence of such impurities in the soil can make the soil particularly nutritious, so that the plant yield will be particularly high.

It's good for the soil, and it's also an organic matter, which can then increase the fertility of the soil, and it can also provide a particularly good production environment for plants.

It's good for the land, of course, it's organic matter, and it's good for plants, and it can provide rich nutrients.

The decomposition of organic fertilizers is a complex process. The process of mineralization and humification of organic matter can only be carried out under soil microbial crops. In order for organic matter to be decomposed, the release of nutrients must rely on the activities of microorganisms.

In the process of decaying, the decomposition and synthesis of organic matter are carried out at the same time.

On the one hand, some organic substances change from complex forms to simple forms, from water-insoluble substances to water-soluble substances, so as to improve the effectiveness of nutrients and make nutrients easy to be absorbed and utilized by crops, which is mineralization.

On the other hand, some simple compounds or intermediate products in the decomposition process, under the action of microorganisms, are resynthesized into complex compounds, and finally can be synthesized into humus, which is humification. Therefore, the production of humus is an important indicator of the decomposition of organic fertilizer, and its content is closely related to the quality of organic fertilizer.

Loam soil has good air permeability and is suitable for plant growth, especially grasses. Deciduous and rotten roots are important for organic matter in the soil. Correcting the fact that the organic matter content of loam is not necessarily high, but it is generally higher, and if you want to analyze the reasons for the high, it is what I said.

Due to the action of microorganisms, the soil polymerizes to form a special class of polymer organic compounds.

The components in the soil that plants can absorb are minerals and small organic molecules.

Minerals mainly refer to the inorganic components of the soil, such as medium and trace elements.

sulfur, calcium, magnesium, copper, zinc, iron, etc.).

Humus. It is the main component of organic matter in the soil, and is a mixture of a variety of macromolecular carbon-containing compounds, but can be decomposed into small molecule substances under the action of microorganisms and some plant exudions.

Plant roots absorb substances in the soil, which can only be absorbed in the form of ions or small molecule organic matter, so macromolecular humus cannot be absorbed, but it can be decomposed into small molecule organic matter to be absorbed.

<> can directly put the soil in an iron container and burn it, if the soil smells burnt, it means that it contains humus.

Humus soil contains a large number of elements such as nitrogen, phosphorus, potassium, sparseness, and calcium.

At the same time, there are trace elements.

Generally, it can be released by microbial decomposition and absorbed by crops. Humus is an organic colloid, its water absorption and fertilizer retention ability is very strong, the water absorption rate of clay particles is about 50-60%, and the water absorption rate of humus can reach 400-600%.

1. How to judge that the soil contains humus

1. You can put the soil in an iron box to burn, and generally the soil containing humus will emit a burnt smell. Soil humus is a special form of organic matter in the soil, which has a special chemical and biological structure of complex polymer compounds.

It is the main form of soil organic matter.

2. Humus contains a large number of elements such as nitrogen, phosphorus, potassium, sparse and calcium, as well as trace elements, which can be released by microbial decomposition for crop absorption and utilization.

3. Humus is a kind of organic colloid, the water absorption and fertilizer retention ability is very strong, the water absorption rate of general clay particles is 50-60%, and the water absorption rate of humus is as high as 400-600%, and the fertilizer retention capacity is 6-10 times that of clay particles.

2. How humus is formed

The formation of soil humus is mainly divided into two processes.

1. Mineralization process.

1) The process by which animal and plant residues entering the soil are decomposed into complex organic matter into simple compounds with the participation of soil microorganisms, and carbon dioxide is generated under well-ventilated conditions.

Water, nitrogen dioxide.

Nitrogen, ammonia.

and other mineral nutrients, the decomposition speed is very fast, thorough, can release a lot of heat energy, and does not produce toxic substances.

2) Under the condition of poor ventilation, the decomposition speed will be relatively slow, incomplete, and the release of energy will be less, in addition to the production of plant nutrients, toxic substances will also be produced.

2. Humification process.

The process of decomposing and polymerizing the animal and plant residues that enter the soil under the action of soil microorganisms and then condense and polymerize into a series of black-brown polymer organic compounds.

Soil organic matter refers to the most life-like substances in the soil. Soil organic matter is an important component of the solid phase part of the soil, which is one of the main components of plant nutrition, which can promote the growth and development of plants, improve the physical properties of the soil, promote the activities of microorganisms and soil organisms, promote the decomposition of nutrients in the soil, and improve the fertilizer retention and buffering properties of the soil. It is closely related to the structure, aeration, permeability, adsorption and buffering of soil, and is usually positively correlated with soil fertility level within a certain content range under the same or similar conditions.

Soil humus is not a pure compound, but represents a class of complex polymer compounds with special chemical and biological properties, which are acidic and brown or dark brown in color. It can be seen that soil humus is a special form of organic matter in soil, and polymer compounds with special chemical and biological properties and complex structure are the main forms of soil organic matter.

The amount and formation of humus in the ecosystem are related to the amount of litter returned and decomposed.

The rate of humus decomposition is closely related to factors such as temperature, humidity and aeration. In terrestrial ecosystems, usually in areas with high latitude and low humidity, the slower the rate of decomposition, which is conducive to the accumulation of organic matter. For example, tundra is located in high latitudes, and the accumulation of humus takes a long time to reach the maximum, with low temperature, slow decomposition, and relatively large accumulation. Tropical rainforests, located at low latitudes, have good hydrothermal conditions, large biomass, and the accumulation of humus can reach its maximum in a short time.

However, due to the high temperature and fast decomposition, the accumulation amount is small.

The process by which soil organic matter forms complex and stable macromolecular organic compounds, humus, through the action of microorganisms.

Basically, it is divided into two stages, the first stage produces the raw material that makes up the main components of humus, that is, a mixture of organic substances in various forms and states, which are broken down into various simple compounds under the action of microorganisms; The second stage is the synthesis stage, which is a biochemical process dominated by microorganisms. The raw material is synthesized into humic monomer molecules, and then polymerized to form complex cyclic compounds of different molecular weights. Factors influencing humus formation include soil moisture and aeration, temperature, soil response, and soil organic matter C/N ratio.

The humification process causes the soil to accumulate humus, and as a result, the soil is differentiated, often forming a dark humus layer in the upper part of the soil.