potassium humate
Potassium humate to remove lead and cadmium in soil
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Potassium Humate are also used for the rehabilitation of soil contaminated by heavy metals like lead and cadmium due to their unique physicochemical properties.

Soil heavy metal pollution is an important environmental problem facing China and many other countries in the world. Soil in situ fixation / stabilization technology is widely used in practical engineering due to its ease of operation, rapid repair, and low cost.

In this paper, the effect of potassium humate on single and composite pollution of lead and cadmium was studied by laboratory culture experiments, using heavy metal morphological extraction and bioavailability in vitro methods, and by assessing soil health risk based on bioavailability.

The main research results are as follows: (1) For lead-contaminated soil, the changes in the form of heavy metals with the addition of potassium humate are manifested as: the content of weakly acid-extracted and reducible lead decreases, and the content of oxidizable and residual lead increases. Two in vitro extraction methods (SBET and PBET) were used to determine the bioavailability of lead. The results showed that with the increase of the amount of potassium humate, the bioavailability of soil lead decreased significantly.

Based on the consideration of land use types, health risk assessment is conducted. It can be seen that the hazard quotient of sensitive land is higher than that of non-sensitive land, and the risk control value of pollutants is lower than that of non-sensitive land. The calculation results obtained using the bioavailability-optimized health risk assessment model show that as the amount of potassium humate increases, the hazard quotient of the contaminated soil is significantly reduced, and the risk control value of lead is significantly increased.

(2) For different concentrations of cadmium contaminated soil, the change trend of heavy metal forms with the addition of potassium humate was mainly manifested by the conversion of weakly acidic cadmium to oxidizable and residual cadmium. The PBET method was selected as the in vitro extraction method of biodegradability. The results showed that the biodegradability of cadmium decreased with the increase of potassium humate, and increased with the increase of cadmium pollution.

potassium-humate
Function of potassium humate
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Function of potassium humate,let us start with humic acid functional group in potassium humate can absorb and store potassium ions, prevent loss with water in sandy soil and leaching soil, and prevent fixation of potassium by sticky soil.

In addition, some parts of potassium humate are low-molecular-weight humic acid such as fulvic acid, which has a corrosive effect on minerals such as potassium silicate and potassium feldspar, which can be slowly decomposed to increase the release of potassium and increase the content of available potassium.

The utilization rate is 87% -95% higher than ordinary potassium fertilizer, which increases fertilizer efficiency, crop yield and quality.
Potassium humate has a combination of land use and land cultivation; long-term and quick-effect coordination; special effects in water retention and fertilizer retention. It combines the advantages of inorganic fertilizers and farm fertilizers and is superior to them.

Function of potassium humate is a good controlled release fertilizer, so that the nutrients in the early stage will not be too much, the nutrients in the later stage will not be too low, and the fertilizer supply curve is stable. The release rate can also be controlled by physical and chemical biotechnology methods to achieve two-way regulation of accelerated release and sustained release.

The supply of nutrients in the fertilizer is basically synchronized with the nutrient requirements of the crop to achieve dynamic balance.
Ordinary chemical fertilizers (such as urea, 50% -60% potassium fertilizer, diammonium phosphate, etc.) can easily produce soil compaction and pollution to water and air, and potassium humate can be avoided or significantly reduced.

And it significantly increases crop yield, improves crop quality, improves crop nutritional content, reduces nitrate content, and has excellent color, fragrance, taste, and storability.

It is the material foundation of environmentally-friendly agricultural cleaner production and green food.

Potassium humate has low loss, high utilization rate, stable plant absorption, and two-way improvement in yield and quality..

Function of potassium humate,It is a “green” potassium fertilizer for agricultural applications and a substitute product for potassium chloride and potassium sulfate for general agricultural use. Potassium humate is suitable for any crop.

potassium humate
potassium humate composition and efficiency
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potassium humate composition and efficiency need to make clear The main components of potassium humate include trace elements, rare earth elements, plant growth regulators, virus inhibitors and other nutrients, which make nutrients more abundant and more reasonable, thus avoiding various physiological physiology caused by lack of elements. The occurrence of the disease.

The main effects of potassium humate are as follows:

Potassium humate can activate the squash soil, promote the physiological metabolism of various melons, fruits and vegetables and field crops, promote the development of roots and flourish stems and leaves.

Potassium humate can be applied, applied, chased, applied or chased by about 20-30 kg, which can save all kinds of fertilizers, and can make fruits and vegetables and various field crops mature for about 10 days in advance, increasing production by 20 %the above.

It can prolong the fresh-keeping period and picking period of fruits and vegetables, prevent falling flowers and fruit drop, increase the sugar content of fruits and improve the quality of fruits.

  1. Potassium humate improves soil aggregate structure, loosens soil, improves soil water retention and fertilizer retention capacity, regulates pH value, reduces heavy metal content in soil, and reduces the damage of salt ions to seeds and seedlings.
  2. Potassium humate fixes nitrogen, dissolves phosphorus, and activates potassium. Especially for the potash fertilizer, the synergy is particularly obvious, which plays a role in increasing roots and strengthening seedlings, resisting heavy mites, resisting diseases and improving crop quality.
  3. Potassium humate enhances the adhesion and rapid absorption capacity of plant roots, especially for physiological diseases caused by the lack of trace elements.

Potassium humate meets the requirements of agricultural production – potassium humate can be adapted to local conditions, meet the needs of soil production under different time and space, zone and natural environment conditions, and meet the current agricultural production status and requirements.

Potassium humate rapidly increases soil fertility – the soil organic matter is less than two or three years old, and more than one hundred years. Industrial development using potassium humate can shorten the time of decomposing organic matter, benefiting it in the current year and even benefiting in the current season.
The combination of organic and inorganic humic acid potassium is good. Potassium humate can be combined with large, medium and micro nutrients and beneficial elements. Once combined, the best state of matching can be achieved. In the case of equal nutrients, potassium humate increased by an average of 10 percentage points or more, equivalent to a net increase of 30% to 40%.

Potassium humate can repair heavy metal pollution in soil – potassium humate can not only reduce the content of heavy metal pollutants in the soil, but also improve the “self-repairing” function of the soil, which is an excellent choice for soil remediation.

Potassium Humate
Potassium humate enhances crop stress resistance
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Potassium humate enhances crop stress resistance,Plant stress resistance index (one): the content of ABA (abscisic acid: a plant hormone that inhibits growth) in plants. The ABA content of plants will increase under any adverse conditions. Abscisic acid is the “first messenger” that initiates the expression of stress-resistant genes in plants, and effectively activates the anti-reverse immune system in plants.

The standard oxidation-reduction potential (E0) of potassium humate is about 0.7 V, which is equivalent to the electrode potential of the semiquinone radical. Therefore, it is considered that the redox property of potassium humate is caused by the mutual conversion of -semiquinone-phenol. In fact, the carbonyl, alcoholic hydroxyl, amino, nitro, and even fatty carbon structural sites in potassium humate may participate in the redox reaction.

This property of potassium humate not only regulates the redox concentration ratio of soil minerals (αOx/αRrd), stimulates microbial activity, regulates the physiological activity of plants, but also changes in geochemistry, heavy metals and organic poisons (oil, polycyclic The migration and toxicity of aromatic hydrocarbons, phenols, dyes, pesticides, etc. also have an effect.

Experiments show that the presence of potassium humate can keep the effective oxidation-reduction potential (Eh) of the soil environment in the optimal range (0.2~0.7V), which is conducive to crop growth and development.
Potassium humate can activate synthetases (aldolase, invertase, etc.) in plants, regulate oxidase activity, and protect auxin, which is the basic reason for improving plant stress resistance.

  1. Drought resistance mechanism
    Studies have shown that potassium humate plays an important role in improving the cell membrane permeability and protecting cell membranes.
  2. (1) Potassium humate increases the abscisic acid content in plants, and abscisic acid as a growth inhibitor can reduce the stomatal opening, reduce water transpiration, promote the accumulation of osmotic substances such as proline, and keep plants more water. At the same time, it promotes root development, enhances its vitality, and enables crops to absorb more water and nutrients under drought conditions; both have open source and throttling complement each other.
  3. (2) Improve the activity of SOD (superoxide dismutase) and CAT (catalase) to scavenge free radicals, reduce the damage of membrane lipids, delay the senescence of plants, and make the life activities of crops less affected by drought. It can be carried out more normally.

2.Cold resistance mechanism

Potassium humate can increase the content of abscisic acid in plants, and abscisic acid can increase the content of proline. Proline, as an important osmotic regulator, can stabilize the structure of biological macromolecules, so that the freezing point can be frozen and protect the plants. Cold resistance.

3.Disease resistance mechanism

The mechanism of antibacterial and anti-disease of potassium humate:

Potassium humate contains a variety of benzene carboxylic acids, which can produce limited immunity to certain diseases of plants: Zhang Dehe and others have been from the sulfurized coal humate potassium in Turpan, Xinjiang. 17 low molecular weight polyphenylene acids and phenolic acids were isolated and identified, and these compounds are likely to be disease-inducing agents with different induction effects.

(1) Potassium humate directly increases the soil organic matter content, provides an excellent environment for beneficial microorganisms, and the beneficial population gradually develops a dominant population, inhibits the growth of harmful bacteria, and the plant itself grows robust due to excellent soil conditions. The ability to strengthen the disease, thus greatly reducing the disease, especially the occurrence of soil-borne diseases.

(2) Potassium humate makes the number of aerobic bacteria, actinomycetes and fiber-decomposing bacteria in the soil increase more, the number of fungi is significantly reduced, the ratio of bacteria to fungi is obviously increased, and many fungi can be prevented disease.

(3) Potassium humate contains a phenolic type such as a carboxyl group or a phenolic hydroxyl group and a benzene carboxylic acid structure, which is the same as the active components of some phenoxycarboxylic acids and phenolic pesticides, and has a certain antibacterial and antiviral action.

Difference between potassium humate and potassium Fulvate
Difference between potassium humate and potassium Fulvate
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Different structure


Potassium fulvate: The main component of potassium fulvate is a short carbon chain molecular structure substance.
Potassium humate: Potassium humate is a non-uniform aromatic hydroxy carboxylate with a black granule or powdery solid. It is a product obtained by finely selecting lignite and then extracting it with KOH liquid. It is soluble in water. It is alkaline and contains active groups such as a carboxyl group and a phenolic hydroxyl group.

Source is different

Potassium fulvate: Potassium fulvic acid is extracted from natural humic acid.
Potassium humate: Potassium humate is extracted from the lignite and then extracted with KOH liquid.

Application is different

Potassium fulvic acid: Potassium fulvic acid is mainly used in agriculture and horticulture industries.
Potassium humate: Potassium humate is mainly used in agriculture, forestry, animal husbandry, petroleum, chemical, building materials, medical and health, environmental protection and other fields.

Advantages are different

Potassium fulvate

Potassium fulvate acid can activate the squash soil, promote the physiological metabolism of various melons, fruits and vegetables and field crops, promote the development of roots and flourish stems and leaves.
Potassium humate

Potassium humate can increase the content of available potassium in soil, increase the absorption and utilization of potassium by crops, and combine Potassium humate and potassium, phosphorus and potassium required by plants to become a multifunctional high-efficiency compound fertilizer.

It is also used in soil improvement, plant production stimulants and fertilizer effect enhancers. It can stimulate the rapid rooting of crops, multi-rooting, robust growth, increase chlorophyll, Vc content and sugar content, play a drought, cold and disease resistance, or a high quality and low cost complexing agent.

The product is all water-soluble, acid-base resistant, anti-divalent ion, and can be co-dissolved with various trace elements and a large number of elements, without flocculation.

Used as a main ingredient or additive for foliar fertilizer, organic fertilizer, fertilization or organic fertilizer. It also has functions such as improving soil, promoting crop growth, improving crop resilience, improving crop quality, and protecting agricultural ecological environment.

Potassium humate effect on crops
Potassium humate effect on crops
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Potassium humate effect on crops has water retention, Drought resistance, cold resistance,Prevention and control of heavy metal pollution,Improve fertilizer efficiency,Promote the growth and development of crops, Adjust the soil pH.

1.water retention


Potassium humate is a colloidal organic substance, which can loosen the soil, absorb large amounts of water, ventilate and humidify, raise cockroaches, prevent drought, and make the soil have good water, gas and heat conditions, suitable for seed germination and seedling stage. Growing.
Second, improve saline-alkali land
Potassium humate has a small molecular weight and high activity. It can adsorb harmful cations in the soil, thereby reducing the concentration of salt in the soil, reducing the damage of salt to seeds and seedlings, and improving saline-alkali soil.


2. Drought resistance, cold resistance

Spraying potassium humate onto plant leaves can close the stomata of plants and reduce water transpiration of plants.

The color of potassium humate is deep, which is good for absorbing solar energy; when potassium humate is decomposed by the action of microorganisms, it will release heat, which can increase the ground temperature and thus play a role in cold resistance.
Fourth, resistance to pests and diseases

Potassium humate can increase the activity of enzymes in plants and increase the resistance of plant organisms.

3.Prevention and control of heavy metal pollution


Potassium humate participates in the ion exchange reaction in the soil, adsorbing and fixing the heavy metal ions in the soil to prevent them from entering the biological cycle.

4.Improve fertilizer efficiency

  • Nitrogen fixation: Nitrogen is applied to the soil and is easily volatilized into the atmosphere or lost to the river with water and soil. Potassium humate can adsorb nitrogen in the soil, reduce its volatilization and loss, and improve utilization.
  • Solution of phosphorus: Phosphorus is applied to the soil and is easily fixed by the soil. Potassium humate can liberate phosphorus from the soil by chelation with phosphorus, which is used for plant absorption and improves phosphorus utilization.
  • Activated potassium: Most of the potassium elements applied to the soil exist in the form of potassium salts and cannot be directly absorbed by the crops. Potassium humate can convert poorly soluble potassium into soluble potassium through ion exchange function, increase effective potassium in soil, and improve potassium utilization.
  • micro-fertilizer: potassium humate can chelate reaction with poorly soluble trace elements, and produce humic acid trace element chelate which is well absorbed by crops, which is beneficial to the absorption of trace elements in roots and leaves.

5. Promote the growth and development of crops

Potassium humate can stimulate root growth, and ultimately the ability of crops to absorb water and nutrients is greatly enhanced.

The stimulating effect of potassium humate can make the above-ground vegetative growth of plants flourish. Expressed in plant height, stem diameter, leaf thickness, etc.;

Potassium humate has a good effect on tilling and reducing the openness rate, which can increase the grain weight of grain and increase grain yield.


6. Adjust the soil pH


Potassium humate has more functional groups, which can be combined with acid and combined with alkali to adjust the pH of the soil according to crop needs.