Product information

Humic Acid Granular, Lignite Granular

1. Increase the stability of soil aggregates.

2. Improve soil pore conditions.

3. Enhance soil fertilizer retention.

4. Improve soil water retention.

5. Promote plant growth.

6. Enhance plant stress resistance.

7. Improve fertilizer utilization efficiency.

What's Humic Acid Granular

Lignite humic acid is a natural macromolecular organic compound widely existing in lignite. It is a type of humic acid, formed by microbial decomposition and geochemical processes

 from animal and plant remains and the like, and then combined with and retained in lignite during the formation process.

Humic acid mainly exists in adsorbed or combined states and is closely combined with the organic matter of coal. Its content varies due to factors such as lignite origin and 

degree of coalification, generally ranging from 10% to 80%.

The molecular structure of lignite humic acid is relatively complex. It is a macromolecular compound formed by connecting multiple basic structural units 

such as aromatic rings and alicyclic rings through carbon chains or chemical bonds. On the rings, there are also various functional groups such as carboxyl groups, 

hydroxyl groups, carbonyl groups, quinone groups, and methoxy groups.

It has good ion exchangeability, adsorption, complexation, chelation, etc. It can interact with metal ions to form stable complexes or chelates. At the same time, 

it also has certain colloidal properties and surface activity, and can exhibit characteristics such as coagulation, peptization, and dispersion in solution.

As a fertilizer additive, combined with nutrient elements such as nitrogen, phosphorus, and potassium to make humic acid fertilizers, it can improve the utilization rate of fertilizers, 

promote the absorption of nutrients by crops, enhance the stress resistance of crops, and improve the yield and quality of agricultural products. It can also improve soil structure, 

increase soil aeration, water permeability, and water retention, promote the growth and reproduction of beneficial microorganisms in the soil, and improve the soil ecological environment.

Guaranteed Analysis

Total Nitrogen (N)----------------------------0.33%

Phosphorus (P2O5)---------------------------0.2%

Potassium (K2O)------------------------------0.7%

Magnesium (MgO)---------------------------1%

Boron (B)-------------------------------------91.4 mg/kg

Sulfur (S)--------------------------------------0.45%

Calcium (CaO)--------------------------------6.34%

Ferro (Fe)-------------------------------------1.96%

Zinc (Zn)--------------------------------------117 mg/kg

Magnesium (Mn)-----------------------------273 mg/kg

Copper (Cu)----------------------------------34.5 mg/kg

Organic Matter-------------------------------21.29%

Carbon (C)-----------------------------------12.35%

Physical State: Gray or black 2-4 mm round granular.

Directions For Use

Base Fertilizer

It is used when plowing the land before crop planting. For spring-sown crops such as corn and wheat, it is applied 1 to 2 weeks before sowing after the soil thaws in spring. 

For autumn-sown crops such as winter wheat, it is applied when the soil is deeply plowed after the autumn crops are harvested.

It depends on soil fertility and crop types. Generally speaking, the application rate is about 10 - 50 kilograms per mu. For example, for vegetable planting in moderately fertile soil, 

the application rate of humic acid granular base fertilizer can be controlled at about 30 kilograms per mu. If it is for fruit tree planting, it can be increased appropriately according 

to tree age and crown size. For adult fruit trees, 1 - 2 kilograms can be applied per tree.

Application method: Before plowing the land, evenly scatter humic acid granules on the soil surface. Then, turn them into the soil by means of plowing or rotary tillage. 

The depth is generally about 20 - 30 centimeters. This can fully mix the humic acid granules with the soil and play its role in improving the soil structure.

Topdressing application

Use time: During the growth period of crops, topdressing is carried out according to the growth stage and nutrient demand of crops. 

For example, during the vigorous growth period of vegetables and the flowering and fruiting period of fruit trees, topdressing is carried out 

when deficiency symptoms (such as yellowing leaves, slow growth, etc.) are found in crops.

Usage amount: The amount of topdressing is generally less than that of base fertilizer, and the usage amount 666 squre metter is about 5 - 20 kilograms. 

For example, for topdressing of flowers, the usage amount can be 5 - 10 kilograms per mu each time; for field crops such as cotton, 

when topdressing during the flowering and boll stage, the usage amount can be 10 - 20 kilograms per 666 squre meter.

Application method:

Furrow application: Open furrows on both sides or between rows of crop plants. The furrow depth is about 10 - 15 centimeters. Evenly scatter humic acid particles 

into the furrow and then cover with soil. This method is suitable for crops with larger row spacings, such as corn and cotton. It can make fertilizers closer to the 

root system and is beneficial for crop absorption.

Hole application: For crops with larger individual plants such as fruit trees and flowers, dig holes around the plants. The hole depth is 15 - 20 centimeters. 

Put humic acid particles into the holes. The number of holes dug per plant depends on the crown size and root distribution. Generally, it is 3 - 5. 

Then cover with soil. This can precisely provide nutrients for crops and improve fertilizer utilization.

Advantages of Using Huic Acid

Improve soil structure

Increase the stability of soil aggregates: 

Humic acid is an organic colloid. It can interact with mineral particles in the soil such as clay and silt. Through cation bridging, 

functional groups such as carboxyl (-COOH) and phenolic hydroxyl (-OH) in humic acid combine with cations such as calcium, magnesium, and iron in the soil, 

binding soil particles together to form a stable aggregate structure. For example, in some farmlands where soil compaction is caused by long-term use of chemical fertilizers, 

after adding humic acid, the number of soil aggregates significantly increases, and the air permeability and water permeability of the soil are significantly improved.

Improve soil pore conditions: 

Humic acid can regulate the size and distribution of soil pores. It can fill small pores in the soil to prevent them from being blocked, and at the same time, 

it also helps to form more large pores. This is beneficial for the exchange of air and the penetration of water in the soil, providing a good environment for 

the growth of plant roots. For example, adding humic acid to the potting soil for growing flowers can keep the soil loose and make the flower roots more developed.

Enhance soil fertilizer retention: 

Humic acid carries a large amount of negative charge and can adsorb cationic nutrients in the soil, such as ammonium ions (NH+), potassium ions (K+), etc., 

to form humic acid-nutrient complexes. These complexes can reduce the leaching loss of nutrients, release nutrients slowly in the soil, and prolong the validity period of fertilizers. 

For example, in vegetable cultivation, the use of humic acid can significantly reduce the leaching loss of nitrogen fertilizer and improve the utilization rate of nitrogen fertilizer.

Improve soil water retention: 

Humic acid has a very strong water absorption capacity and can absorb several times its own weight in water. Under drought conditions, 

it can store the absorbed water and release it slowly to the plant roots. At the same time, humic acid can also improve the soil water characteristic curve, 

enabling the soil to retain more water at a lower suction force, thereby enhancing the soil's drought resistance. 

For example, using humic acid in orchards can enhance the soil's water supply capacity to fruit trees in dry seasons.

Promote plant growth

Stimulate plant root system development: Humic acid can promote the division and elongation of plant root cells. It can regulate the balance of plant hormones. 

For example, it can increase the activity of auxin (IAA) and stimulate the growth and differentiation of roots. 

Studies have shown that after adding humic acid in the cultivation of corn seedlings, the length, volume, and number of root hairs of corn roots have significantly increased, 

which helps plants better absorb water and nutrients.

Improve plant photosynthesis efficiency: Humic acid can increase the chlorophyll content in plant leaves and enhance the light reaction and dark reaction processes of photosynthesis. 

It can regulate the structure and function of chloroplasts and promote photosynthetic electron transfer and carbon dioxide fixation. For example, in greenhouse vegetable planting, 

after using humic acid, the chlorophyll content in vegetable leaves increases, photosynthesis is enhanced, and the yield also increases accordingly.

Enhance plant stress resistance

Improve plant drought resistance: In addition to indirectly improving plant drought resistance by improving soil water retention capacity as mentioned earlier,

humic acid can also act directly on plants. It can regulate the physiological metabolism process of plants. Under drought stress, 

it reduces the opening degree of plant leaf stomata and reduces transpiration, thereby reducing water loss. 

At the same time, humic acid can also induce plants to produce some drought-resistant proteins and metabolites, enhancing the tolerance of plants to drought.

Enhance plant cold resistance: In a low-temperature environment, humic acid can increase the concentration of solutes in plant cells, lower the freezing point of plants, 

and prevent cell damage caused by the freezing of intracellular water. In addition, it can also increase the activity of antioxidant enzymes in plants and remove excessive free radicals generated

 by low-temperature stress to protect the integrity of plant cell membranes. For example, in the cultivation of winter wheat in the north, 

the use of humic acid can reduce the degree of frost damage to wheat in winter.

Enhance plant disease resistance: Humic acid can induce plants to produce systemic acquired resistance (SAR) and activate the plant's own defense mechanism. 

It can enhance the strength of plant cell walls and make it difficult for pathogens to invade. 

At the same time, humic acid can also promote the synthesis of disease-resistant substances such as phytoalexins and chitinases in plants, 

playing an inhibitory and resistant role against pathogens. For example, in cucumber cultivation, 

humic acid can reduce the occurrence of diseases such as cucumber downy mildew.

Improve fertilizer utilization efficiency.

Synergistic effect with chemical fertilizers: Humic acid can form organic-inorganic complexes with chemical fertilizers. 

For example, when combined with urea, humic acid can reduce the hydrolysis rate of urea in the soil and prevent the volatilization loss of ammonia gas generated by the rapid decomposition of urea.

At the same time, this complex can also improve the distribution of chemical fertilizers in the soil, making it easier for plant roots to contact and absorb chemical fertilizers,

 thereby improving the utilization rate of chemical fertilizers and reducing the amount of chemical fertilizers used.

Activation of soil nutrients: Humic acid has a strong complexing and chelating ability and can react with insoluble nutrients such as phosphorus and potassium in the soil 

and convert them into forms absorbable by plants. For example, it can form soluble complexes with insoluble phosphate fertilizers 

such as calcium phosphate in the soil and release phosphate ions for plant absorption, improving the effectiveness of phosphorus in the soil.