The Application Value of Humic Acid in Agriculture

Abstract: Humic acid is a macromolecular organic substance widely existing in nature. It is a macromolecular organic acid composed of aromatics and various functional groups. It has good physiological activity and functions such as absorption, complexation and exchange. It widely exists in soil, lakes, oceans, peat, lignite, and leonardite. The humic acid content in peat, brown coal, and Leonardite can reach 20%-70%, and the utilization value is great. According to the solubility and color classification in the solvent, humic acid is divided into Fulvic Acid, Hymatomelanic Acid, and Black Humic Acid. Humic acid products have been widely used in agriculture, livestock breeding, industry, environmental protection, medicine and other fields, and have become important active substances such as synergists, stabilizers, accelerators or inhibitors. Among them, the application value of humic acid in agriculture is particularly prominent. 

1. Fertile soil

1.1 Humic acid can deepen the color of the soil, thereby improving the absorption of solar radiation and increasing the soil temperature.

1.2 Humic acid is the bridge and binder of soil aggregates, and its gel properties promote soil particles to bond to each other into stable aggregates.

1.3 Humic acid can reduce soil bulk density and porosity, increase water holding capacity, and keep the improved soil in a loose, porous and small particle state.

1.4 Humic acid can adjust the pH value of the soil, improve the buffer capacity of the soil, and provide a stable environment for the growth of crops.

1.5 Humic acid can improve soil cation exchange capacity and prevent cation loss. At the same time, reduce the salt content, play the role of separating salt and suppressing alkali.

1.6 Humic acid can regulate redox bonds and improve soil electron transfer potential.

1.7 Humic acid can eliminate soil heavy metal and organic poison pollution.

1.8 Humic acid can activate and store nutrients in the soil, and promote the release of nutrients in soil properly.

1.9 Humic acid can provide the main energy source for soil organisms and microorganisms, help establish populations, and promote beneficial activities.

1.10 Humic acid is an excellent soil conditioner, improving the harsh soil environment such as saline-alkali land and sandy soil.

2. Synergistic fertilizer

2.1 Humic acid can dissolve phosphorus, activate potassium, fix nitrogen, and improve the utilization rate of nitrogen, phosphorus and potassium in the soil.

2.2 Humic acid can synergize, protect the medium and trace elements and rare earth elements in the soil, and supplement the nutrient elements needed by plants.

3. Stimulate crop growth

3.1 Humic acid can promote the growth of plant roots, stimulate the division of root cells, and improve the germination rate.

3.2 Humic acid can enhance the respiration intensity and photosynthesis intensity of plants.

3.3 Humic acid can improve the physiological metabolism and enzyme activity of plants, and accelerate the synthesis of amino acids, proteins, nucleic acids and other substances.

4. Enhance crop resistance

4.1 Humic acid can reduce the stomatal opening of plant leaves, reduce water transpiration, and improve the drought resistance of plants.

4.2 Humic acid can increase the content of free proline and protective enzymes in plants, and enhance the cold resistance of crops.

4.3 Humic acid can improve the metabolic function of plants and improve the ability of plants to resist pests and diseases.

4.4 Humic acid can improve the ability of plants to tolerate the harsh environment of saline and alkali.

5. Improve the quality of agricultural products

5.1 Humic acid can improve the nutritional content of grains, fruits, vegetables and other crops, such as sugar content, vitamin C, soluble protein, amino acid, protein, starch, etc.

5.2 Humic acid can reduces the content of nitrate, heavy metals and other harmful substances in agricultural products.

6. Attenuate and synergize pesticides and improve the effect of pesticides