Fulvic acid is the smallest and most active component of humic acid. It is the essence of the active ingredients of humic acid. In the practical application of agricultural production, the stability of fulvic acid is the best.
Fulvic acid is the best core component of soil humus. Is that the molecular weight generated by decomposition and decomposition of organic matter is small, Fully water soluble organic aromatics,
Is the best humic acid in the soil,It is the core material that forms the structure of soil aggregates.
Advantages of fulvic acid
The fulvic acid contains functional groups such as carboxyl group and phenolic hydroxyl group, which has strong complexation, chelation and surface adsorption ability, can reduce the loss of ammonium nitrogen, increase the moving distance of phosphorus in the soil, and inhibit the fixation of water-soluble phosphorus in the soil. Ineffective phosphorus is converted into effective phosphorus, which promotes the absorption of phosphorus by roots; fulvic acid can absorb and store potassium ions, and the effective potassium content is especially effective for potassium fertilizer.
The fulvic acid can increase the utilization rate of nitrogen, phosphorus and potassium nutrients in the fertilizer by more than 20%.
The synergistic effect of fulvic acid on nitrogen fertilizer The active groups of fulvic acid (including carboxyl groups, hydroxyl groups and certain groups containing P, O, N, S) are generally electron donors, which are easily associated with many electron acceptors. (Multivalent metal ions, organic groups or ions) constitute a coordination compound called a complex or a chelate. For example, fulvic acid-urea, etc., is actually a complex (chelating) substance, which can reduce the loss of ammonium nitrogen and increase the utilization rate of nitrogen fertilizer. Oxidatively degraded nitroxanthohumic 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 the farmland test, the effect of ammonium bicarbonate was maintained for more than 20 days, and the ammonium fulvic acid could reach more than 60 days. The addition of fulvic acid, especially nitroxanthate, to urea can form a urea complex, which slows the decomposition of urea, prolongs the fertilizer efficiency, reduces the loss, and increases the utilization rate of urea by 30% and the aftereffect by more than 15%. As a result of measuring the nitrogen use efficiency, the utilization rate of fulvic acid was increased from 30.1% to 34.1%, and the nitrogen uptake was increased by 10%.
The effect of fulvic acid combined with nitrogen on plant growth and development is very obvious. When nitrogen and fulvic acid are sufficient, plants can synthesize more protein, promote cell division and growth, so the plant leaf area grows faster, and more leaf area can be used for photosynthesis. It has obvious effects on promoting plant growth and health. Often, after application, the leaf color turns green quickly and the amount of growth increases.
The synergistic effect of fulvic acid on phosphate fertilizer: Degraded fulvic acid can increase the distance of phosphorus movement in the soil, inhibit the fixation of water-soluble phosphorus in the soil, convert the ineffective phosphorus into effective phosphorus, and promote the absorption of phosphorus by roots. Use fulvic acid to protect water-soluble phosphate fertilizer or phosphorus-based compound fertilizer to reduce phosphorus fixation; promote phosphorus absorption and increase phosphorus fertilizer utilization rate.
The fertilizer efficiency test showed that adding 10-20% of fulvic acid to calcium, heavy calcium or ammonium phosphate could increase the fertilizer efficiency by 10-20% and the phosphorus uptake by 28~39%. The radioactive phosphorus tracer test measures the utilization rate of phosphate fertilizer. After adding fulvic acid, the utilization rate of phosphate fertilizer increased from 15.4% to 19.3%, that is, the utilization rate of phosphate fertilizer increased by a quarter.
The fulvic acid and phosphate fertilizer participate in photosynthesis, respiration, energy storage and transmission, cell division, cell enlargement and other processes in plants.
Synergistic effect on potassium fertilizer: The acidic functional group of fulvic acid can absorb and store potassium ions, and reduce the amount of potassium lost with water in sandy soil and leached soil. The fulvic acid prevents the fixation of potassium in sticky soils and increases the amount of exchangeable potassium.
fulvic acid has a dissolution effect on the potassium-containing minerals, slowly increasing the release of potassium and increasing the content of available potassium in the soil. Fulvic acid can also use its biological activity to stimulate and regulate the physiological metabolism of crops, increasing the potassium uptake by more than 30%.
The combination of fulvic acid and potassium promotes photosynthesis, can significantly increase the absorption and utilization of nitrogen by plants, and is quickly converted into protein, and can also promote plant economic water.
Promote the absorption of micro-fertilizer and effectively solve the deficiency syndrome: the trace elements in the chelating agent of fulvic acid form a humic acid chelate compound which is highly mobile and easily absorbed by crops, and is transmitted to the defective part of the crop to effectively solve the deficiency syndrome.
In addition to a large number 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 the crops and promote the normal growth and development of crops. Increasing disease resistance, increasing yield and improving quality all have important implications. Most of the trace elements in the soil are in an ineffective state that plants are difficult to absorb, and the application of trace element fertilizers to the soil is also easily fixed by the soil.
According to the research, decoctantic acid can react with trace elements such as iron and zinc to form a sulphate trace element chelate compound with good solubility and easy to be absorbed by plants, such as fulvic acid-Zn and fulvic acid-Mn. , fulvic acid-Fe, etc., is conducive to the absorption of roots or leaves, and can promote the trace elements from the roots to the upper part of the ground.
The experiment showed that the amount of iron fulvic acid entering the roots from the roots was 32% more than that of ferrous sulfate, and the number of movements in the leaves was twice that of ferrous sulfate, which increased the chlorophyll content by 15 to 45%, effectively solving the problem caused by iron deficiency. Yellowing of the leaves.
Fulvic acid, important for agriculture
As a plant growth regulator, fulvic acid is the best component of soil humus, not only reducing crop burden, increasing soil fertility, enriching the matrix of soil bacteria, but also improving crop yield and quality to help agriculture Achieve long-term development goals of increasing production, upgrading, and raising land. Thereby solving the quality problem of crops. ”