Humic acid improved soil

Introduction: Soil is the loose surface of plants on the earth's land that can grow. Fertility is the basic property of the soil. There are many basic traits affecting fertility, including: the thickness of soil tillage layer; the texture and structure of ploughed soil: soil organic matter content; soil nitrogen, phosphorus, potassium and other nutrient contents; soil pH.

At present, in the domestic cultivated soil, the fertility level is low, the soil physical and chemical properties are poor, and the low-yield soil with low crop yield is about 30%. The basic traits of these soils can be summarized as: "dry, alfalfa, salt, alkali, acid, board, thin". Reconstructing low-yield soils has made it important for agriculture to achieve balanced production and accelerate agricultural modernization.

Among the measures to improve low-yield soils, the application of organic fertilizers in large quantities and the increase of soil organic matter are one of the important measures. Coal humic acid has similar structure and properties to humic acid in soil organic matter. Therefore, peat, lignite, weathered coal and humic acid fertilizer produced by it are widely applied. Practice has shown that it can also play a significant role in soil improvement.

I. Improvement of saline-alkali soil

The main hazards of saline-alkali soil are: the soil salt content is too high; the concentration of harmful ions (such as Na+, CI-, HCO3-, CO22-, Mg2+, etc.) is too large; the soil is too alkaline; the soil particles are highly dispersed, and the soil structure is poor. Crop growth and development is inhibited.

Long-term application of humic acid substances in large quantities can gradually change the physical and chemical properties of saline-alkaline soil.

1. Promote the formation of soil aggregates

2, reduce the amount of salt in the topsoil

3. Improve soil exchange capacity

4. Reduce the pH of saline-alkaline soil

Second, the improvement of white soil

The white soil is mainly distributed in the northeastern part of China. There is a layer of ashing layer about 5-10cm at the bottom of this kind of soil plough layer. This layer has poor soil permeability, strong cohesiveness, high acidity, poor soil structure, weak biological activity, and difficult penetration of crop roots, which leads to white pulp. The main reason for the low yield of soil.

The application of peat to the increase of soil organic matter and the change of soil humic acid composition have important effects, mainly in the absolute content of humic acid and fulvic acid, which are obviously increased, and the treatment of applying high amount of peat is more obvious. The improvement of peat to white soil improved the physical properties and nutrient status of the soil, increased the content of soil humus, increased the salt exchange capacity of the soil, and created suitable environmental conditions for crop growth. In the improved soil, the available nitrogen and phosphorus contents are stable at the level of 5-15mg/100g soil; the soil water holding capacity is maintained at 40-50%; the capillary porosity is above 50%, and the soil bulk density is 1.0g/cm3. Left and right, basically reach the physical and chemical indicators of high-yield and stable soil. After the improved white soil, the yield of corn and soybean cultivation has increased by nearly two compared with the unimproved output, and the economic benefits are also very significant.

Third, the improvement of red loam

The southern provinces of China are located in tropical and subtropical regions and have a large area of ​​red soil. Due to the high temperature and rain in this kind of soil, the soil organic matter decomposes quickly, and the fat content is easily lost with the rainwater, so the soil organic matter and nutrients are poor. Due to the heavy rain, most of the alkaline components in the soil are leached, and the acidic substances such as iron and aluminum which are not easy to flow are relatively accumulated, especially the increase of aluminum causes the red soil to be acidic or strongly acidic. At the same time, iron, aluminum and other components can easily fix phosphorus, which reduces the effectiveness of phosphorus. In addition, the soil structure is poor, the water is too much, and the soil particles absorb water and disperse into a paste; when the soil is dry, the clod becomes solid and hard. The characteristics of red soil can be attributed to the words "acid, sputum, plate, dry".

The effects of humic acid on the chemical properties of red soil are mainly reflected in the increase of soil organic matter content, the increase of available nutrient content, the increase of salt exchange and the decrease of acidity.

So what is humic acid in the end?

Humic acid is a kind of polymer-insoluble organic acid polymer with water-insoluble aromatic core as the main body and containing various functional groups. It includes humic acid (black humic acid + palm humic acid) and fulvic acid (yellow rot). Acid), widely found in nature, is an important part of the organic matter in the soil. It combines with a monovalent alkali metal substance such as ammonium, sodium or potassium to produce a water-soluble humate.

Humic acid contains 52% carbon, 3%-4.5% hydrogen, 30%-39% oxygen, and 3.5%-5% nitrogen. It is generally considered to have four hydroxyl groups and three phenolic hydroxyl groups in the molecule, so that it has a large cation substitution amount, generally 300-500 cmol/kg, and thus has good fertilizer retention, but it is bivalent. The cation-bonded product is insoluble in water, so it is an indispensable substance in the formation of a water-stable aggregate structure.

Fulvic acid (such as fulvic acid) has a small molecular weight and is easily absorbed by the organism. It has a large functional group content, a large physiological activity, and can be directly dissolved in water. These characteristics determine that it has more applications in agriculture.

Its main role is:

1 It can reduce the opening degree of crop stomata, reduce the transpiration of water, and keep more water in plants and soil. It is an excellent drought-resistant agent.

2 to improve a variety of enzyme activities and chlorophyll content, increase metabolism and photosynthesis, increase sugar and dry matter, thereby improving crop resistance to freezing and disease resistance, improve crop yield, improve crop quality, is a new type of plant Growth regulator.

3 through the physical and chemical interactions with pesticides to form pesticides, fulvic acid complexes. The composite not only reduces the toxicity of the pesticide, but also reduces the pollution, improves the efficacy and reduces the dosage, and is a better pesticide slow release synergist;

4 can complex trace elements to improve the ability of crops to absorb trace elements;

5 can corrode minerals such as potassium feldspar to release various nutrients. However, its salt with a divalent cation can be dissolved in water, which is not conducive to the formation of a water-stable aggregate structure.

Then: What is the humic acid organic fertilizer?

What is humic acid organic fertilizer?

Using lignite, oil shale and other raw materials, using different production methods to produce a product containing a large amount of humic acid and the oxygen, phosphorus, potassium and some trace elements required for crop growth and development, it is called humic acid organic fertilizer.

What is the difference between humic acid organic fertilizer and farmyard manure?

The farmyard manure must be fully matured before it can be applied to the soil, and it needs to be transformed for a long time. It can be finally converted into a humic acid crop to be absorbed. The humic acid organic fertilizer directly supplies the necessary nutrients to the crop, so it is easier than the farmyard manure. Absorption, high utilization rate, quick effect.

Functional description of highly active humic acid:

Highly active humic acid is an organic combination of microorganisms and high-quality humic acid. The product has high activity and obvious effect. Main features:

1. Improve soil structure, promote the formation of agglomerates, coordinate soil water, fertilizer, gas and heat conditions, and not only can ventilate, but also retain water and not compact.

2. Enhance the ability of soil to maintain fertilizer and fertilize, maintain strong fertility, reduce effective nutrient loss, and provide long-lasting fertilizer, so that the fertilizer efficiency of various quick-acting fertilizers becomes “slow, stable and long” from “violent, fierce and short”. .

3. Improve soil acidity and alkalinity and reduce the side effects of toxic factors.

4. Providing the nutrients needed for microbial life activities, promoting the growth and activity of microorganisms, and enhancing the activity of microorganisms.

5. Improve the fertilizer efficiency of chemical fertilizers, combine humic acid with nitrogen, increase the yield of nitrogen fertilizer by about 10%, and increase the utilization rate of phosphorus by more than one time.

6, can germination early and increase seed germination rate and emergence rate, with a certain concentration of humic acid soaking seeds, can be germinated 1-3 days earlier, the emergence rate increased by 10% -25%.

7. Promote rooting and improve root water absorption capacity. Roots are immersed in humic acid roots. The roots of the crops are fast, the number of roots is increased, the root weight is increased, and the roots absorb the nutrient.

8, can enhance the development of reproductive organs, early flowering, increase pollination rate, increase grain weight, fruit weight.

9. Enhance the stress resistance of crops. The crops using humic acid are resistant to cold and drought, and the disease resistance is obviously enhanced.

10, stimulate crop growth and development, the use of humic acid can enhance the activity of a variety of enzymes in crops, improve the ability of crops to absorb water and nutrients, enhance crop metabolism, accelerate growth and development, early maturity and improve quality.

All of the above functions are attributed to humic acid,,,,,, (organic fertilizer agrochemicals)