Fulvic acid, as the most chemically active type of small molecule humic acid (molecular weight ranging from hundreds to thousands) among humic acids, has always been a leader in the agricultural application of humic acid. So what does this little fulvic acid do? What benefits can it provide to crops and soil?
Improve soil aggregate structure
Fulvic acid is a humic substance that can affect the properties of soil, promote the formation of a more stable aggregate structure in the soil, and increase the aggregate content and organic matter content in the soil. It can retain moisture in the soil and increase ventilation, which is beneficial to the growth of crops.
Enhance soil water retention
Fulvic acid is a hydrophilic colloid with strong water absorption capacity. The maximum water absorption capacity can exceed 500%. The weight of water absorbed from the saturated atmosphere can be more than double its own weight, which is much larger than ordinary mineral colloids. Fulvic acid inhibits crop transpiration, slows down soil water consumption, and increases soil moisture content accordingly.
| Super Potassium Fulvate | |
| Product technical indicators | |
| Fulvic Acid (dry basis) | 50% |
| Humic Acid (dry basis) | 50% |
| N+P2O5+K2O (dry basis) | 20% |
| Water Solubility (dry basis) | 95-100% |
| Moisture | 15% max. |
| pH | 8-11 |
| Appearance | Flakes/Powder/Tablets |
Enhance soil fertility
Fulvic acid itself is an organic acid, which not only increases the dissolution of mineral parts in the soil, provides soil nutrients, but also increases the availability of nutrients through complexation. As an organic colloid, fulvic acid has both positive and negative charges and can adsorb anions and cations, so that these nutrients can be preserved in the soil and will not be lost with water, improving the utilization rate of fertilizers, which is of particular significance on sandy soil.
Adjust soil solution pH
Fulvic acid and fulvic acid convert into each other to form a buffer system, thereby regulating the pH of the soil solution.
Reduce soil salinity
The colloidal structure formed by fulvic acid complexing and chelating metal cations in the soil and its porosity (large specific surface) can adsorb ions or molecules in the soil solution and reduce the concentration of salt in the soil solution.
Biological effects
Fulvic acid contains a variety of oxygen-containing functional groups, which determine its physiological activity, thereby regulating life activities, promoting the growth and reproduction of beneficial bacteria, and inhibiting the number of harmful microorganisms; the carboxyl and phenolic hydroxyl groups in fulvic acid can inhibit viruses to a certain extent role.
| Neutral Potassium Fulvate | |
| Product technical indicators | |
| Fulvic Acid (dry basis) | 50% |
| Humic Acid (dry basis) | 50% |
| K2O (dry basis) | 12% |
| Water Solubility (dry basis) | 95-100% |
| Moisture | 15% max. |
| pH | 6-8 |
| Appearance | Flakes/Powder/Tablets |
Improve fertilizer utilization efficiency
- Fulvic acid contains functional groups such as carboxyl and phenolic hydroxyl groups, and has strong complexing, chelating and surface adsorption capabilities, which can reduce the loss of ammonium nitrogen;
- Increase the moving distance of phosphorus in the soil, inhibit the fixation of water-soluble phosphorus in the soil, convert ineffective phosphorus into available phosphorus, and promote the absorption of phosphorus by the roots;
- Fulvic acid can absorb and store potassium ions, increasing the content of available potassium, especially for potassium fertilizers. Experiments show that fulvic acid can increase the utilization rate of nitrogen, phosphorus and potassium nutrients in fertilizers by more than 20%.
1. Synergistic effect on nitrogen fertilizer
The active groups of fulvic acid (including carboxyl groups, hydroxyl groups, and some groups containing P, O, N, and S) are generally electron donors and can easily interact with many electron acceptors (multivalent metal ions, organic groups or ions) to form coordination compounds, called complexes or chelates. For example, fulvic acid-urea, etc. are actually complex (chelate) substances, which can reduce the loss of ammonium nitrogen and improve the utilization rate of nitrogen fertilizer. Oxidatively degraded nitrofulvic acid can inhibit urease activity and reduce urea volatilization.
Adding fulvic acid to ammonium bicarbonate can reduce the nitrogen volatilization rate of ammonium bicarbonate from 13.1% to 2.04% in 6 days. In field trials, the ammonium bicarbonate fertilizer effect lasted for more than 20 days, and the ammonium fulvic acid fertilizer effect lasted for more than 60 days. Adding fulvic acid, especially nitrofulvic acid, to urea can generate urea complexes, slow down the decomposition of urea, extend the fertilizer efficiency, reduce losses, increase the utilization rate of urea by 30%, and increase the aftereffect by more than 15%. The nitrogen fertilizer utilization rate measurement results showed that after adding fulvic acid, the utilization rate increased from 30.1% to 34.1%, and the nitrogen absorption amount increased by 10%.
The effect of fulvic acid and nitrogen on plant growth and development is very obvious. When nitrogen and fulvic acid are sufficient, plants can synthesize more proteins and promote cell division and growth. Therefore, plant leaf area grows quickly and more leaf area can be used for photosynthesis. It has a significant effect on promoting plant growth and robustness. Often after application, the leaves turn green quickly and the growth increases.
2. Synergistic effect on phosphate fertilizer
Degraded nitrofulvic acid can increase the distance phosphorus moves in the soil, inhibit the fixation of water-soluble phosphorus in the soil, convert ineffective phosphorus into available phosphorus, and promote the absorption of phosphorus by roots. Use fulvic acid to protect water-soluble phosphate fertilizers or phosphorus-based compound fertilizers to reduce phosphorus fixation; promote phosphorus absorption and improve phosphate fertilizer utilization. Fertilizer efficiency tests show that adding 10 to 20% fulvic acid to ordinary calcium, heavy calcium or ammonium phosphate can relatively increase fertilizer efficiency by 10 to 20% and increase phosphorus absorption by 28 to 39%. The radioactive phosphorus tracer test measured the utilization rate of phosphate fertilizer. After adding fulvic acid, the utilization rate of phosphate fertilizer in the season increased from 15.4% to 19.3%, that is, the utilization rate of phosphate fertilizer increased by a quarter.
Fulvic acid and phosphate fertilizers participate in photosynthesis, respiration, energy storage and transfer, cell division, cell enlargement and other processes in plants.
3. Synergistic effect on potash fertilizer
The acidic functional group of fulvic acid can absorb and store potassium ions, reducing the amount of potassium lost with water in sandy soil and soil with strong leaching. Fulvic acid prevents the fixation of potassium in clayey soils and increases the amount of exchangeable potassium. It has a dissolving effect on potassium-containing minerals, slowly increasing the release of potassium and increasing the available potassium content of the soil. Fulvic acid can also use its biological activity to stimulate and regulate the physiological metabolic process of crops, increasing potassium absorption by more than 30%.
The combination of fulvic acid and potassium can promote photosynthesis, significantly improve plants’ absorption and utilization of nitrogen, and quickly convert it into protein. It can also promote plant economic water use.
4. Promote the absorption of trace elements and effectively solve deficiencies
The trace elements in fulvic acid chelate form fulvic acid chelates that are highly mobile and easily absorbed by crops, and are delivered to deficient parts of crops to effectively solve deficiencies.
In addition to large amounts of elements such as nitrogen, phosphorus, and potassium, crop growth and development also requires trace elements such as iron, boron, manganese, zinc, molybdenum, and copper. They are components of various enzymes in crops and are important for promoting normal growth and development of crops. Improving disease resistance, increasing yield and improving quality all have important impacts.
Most of the trace elements in the soil are in an ineffective state that is difficult for plants to absorb. When trace element fertilizers are applied to the soil, they are easily fixed by the soil.
Studies have pointed out that chelation reactions can occur between fulvic acid and trace elements such as iron and zinc to form fulvic acid trace element chelates with good solubility and easy absorption by plants, such as fulvic acid-Zn and fulvic acid-Mn. , fulvic acid-Fe, etc., which are beneficial to root or leaf absorption, and can promote the movement of trace elements from the roots to the ground. Tracer tests show that the amount of iron fulvic acid entering the plant from the roots is 32% more than that of ferrous sulfate, and the amount of iron fulvic acid moving in the leaves is twice that of ferrous sulfate, increasing the chlorophyll content by 15 to 45%, effectively solving the problem of plant deficiency. Iron causes leaf yellowing.
5. The effect of using fulvic acid in combination with individual medium and trace elements
- Rice is a silicon-loving crop. Rice uses fulvic acid silicon fertilizer to increase ear-grain weight, mature earlier, and improve disease resistance. It can enhance the resistance of crops to pests and diseases and reduce the damage caused by pests and diseases; it can improve the lodging resistance of crops, enhance the ventilation of crops and improve the stress resistance of crops; it can reduce the stability of phosphorus in the soil; it can improve the quality of agricultural products and Convenient for storage and transportation.
- Fulvic acid combined with calcium fertilizer can reduce fruit absorption, increase fruit hardness, make the fruit storage-resistant, reduce rot, and increase Vc content.
- Fulvic acid combined with magnesium fertilizer can promote photosynthesis of plants, promote protein synthesis, increase crop yields and improve the quality of agricultural products.
- Fulvic acid combined with sulfur can increase protein content, improve the quality of cereal crops, increase vitamin A content and oil content of oil crops. It can also improve the quality of fruits, vegetables, beets and other varieties, and can enhance the cold resistance and resistance of crops. Drought resistance.
- Fulvic acid combined with zinc is absorbed by plants in the form of Zn2+. In the nitrogen metabolism, it can well change the ratio of organic nitrogen and inorganic nitrogen in the plant, greatly improve the ability to resist drought and low temperature, and promote the healthy growth of branches and leaves. ; Participate in the production of chlorophyll, prevent the degradation of chlorophyll and form carbohydrates.
6. Mechanism of sustained-release and synergistic pesticides
- Fulvic acid has the function of surfactant, which can reduce the surface tension of water and emulsify and disperse pesticides;
- Can produce varying degrees of hydrogen bond association or ion exchange reactions with many pesticides;
- Fulvic acid, as a colloidal substance with large viscosity and large surface area, may have strong physical adsorption effect on pesticides.
- Fulvic acid itself has antibacterial and anti-disease effects, and its combination with fungicides is equivalent to the combination of two pesticides.
- Make fruits color and mature in advance, similar to the ripening effect of ethylene.
- Promote cell division, cell elongation, differentiation, etc., similar to the effects of two or more plant hormones.
| Excellent Potassium Fulvate | |
| Product technical indicators | |
| Fulvic Acid (dry basis) | 50% |
| Humic Acid (dry basis) | 50% |
| K2O (dry basis) | 12% |
| Water Solubility (dry basis) | 95-100% |
| Moisture | 15% max. |
| pH | 8-11 |
| Appearance | Flakes/Powder/Tablets |
7. Improve the quality of agricultural products
Fulvic acid strengthens the enzyme’s synthesis and operation of sugar, starch, protein, fat and various vitamins. It can stimulate the activity of polysaccharase and convert polysaccharides into soluble monosaccharides, thereby increasing the sweetness of the fruit; increasing the ratio of total sugar to nicotine and potassium to chlorine in tobacco leaves, improving the quality of tobacco leaves; increasing the total content of watermelon, cantaloupe and other fruits. Sugar content and vitamin C content.
① Regulate enzymatic reactions and enhance plant life activities.
Enzymes are biological catalysts for plant life activities, and the role of enzymes is expressed by enzyme activity. Fulvic acid can stimulate the activity of polysaccharase, hydrolyze the pectin of young cell walls, and soften the cell walls, making the cells easy to elongate and divide, and grow vertically and horizontally. Therefore, it has a significant effect on promoting the growth of young cells in new tissues, and has a positive effect on the growth of roots.
The role of growing points is particularly significant. Fulvic acid contains a large amount of carboxyl groups, which can inhibit the activity of auxin oxidase, reduce the destruction of auxin, and increase the content, which is beneficial to the growth of roots and stems, allowing crops to take root quickly, produce more secondary roots, increase root mass, and elongate the root system. The ability of crops to absorb water and nutrients increases.
Fulvic acid can promote the activity of sugar invertase, starch phosphorylase and some enzymes related to protein and fat synthesis, increase the synthesis and accumulation of sugar, starch, protein, fat, nucleic acid, vitamins and other substances, and promote transferase Its activity accelerates the movement of various metabolites from stems, leaves or roots to fruits and grains, which has a direct impact on increasing and improving the yield and quality of crops.
② Increase chlorophyll content and promote photosynthesis
Fulvic acid can promote the absorption and operation of trace elements by plants, significantly increase the chlorophyll content of leaves, and inhibit the activity of proteolytic enzymes, slowing down the decomposition of chlorophyll. Fulvic acid can increase the activity of protective enzymes and reduce the damage of chlorophyll by reactive oxygen species. These are beneficial to maintaining and increasing chlorophyll content, promoting photosynthesis, and increasing the accumulation of photosynthetic products.
③ Enhance respiration
Fulvic acid can enhance the activity of respiratory enzymes, especially the activity of terminal oxidase, thereby enhancing respiration, continuously releasing energy and producing many intermediate products, which are provided for plants to carry out life activities. The respiration is strengthened, thereby promoting the absorption function and substance synthesis of the roots.
④ Promote the absorption and transportation of mineral elements
Many trace mineral elements such as Fe, Cu, Zn, Mn, B, Mo, etc. are components of enzymes or coenzymes involved in plant metabolic activities, or have an important impact on the activity of various enzymes and plant stress resistance. Some are cell structural substances. of components. Fulvic acid can form soluble complexes (chelates) with mineral elements in the soil. This function of fulvic acid improves the absorption of many trace elements by crops.
| First Grade Potassium Fulvate | |
| Product technical indicators | |
| Fulvic Acid (dry basis) | 40% |
| Humic Acid (dry basis) | 50% |
| K2O (dry basis) | 12% |
| Water Solubility (dry basis) | 95-100% |
| Moisture | 15% max. |
| pH | 8-11 |
| Appearance | Flakes/Powder/Tablets |
8. Enhance crop stress resistance mechanism
Plant stress resistance index (one): the content of ABA (abscisic acid: a plant hormone that inhibits growth) in the plant. The ABA content of plants increases under any stress conditions. Abscisic acid is the “first messenger” that initiates the expression of stress-resistance genes in plants and effectively activates the anti-stress immune system in plants.
