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The application of humic acid fertilizers can enhance the activity of enzymes in soil and plants, regulate the physiological and metabolic functions of crops, and enhance the adaptability of crops to adverse environmental conditions.

The comprehensive effect of humic acid

1. Humic acid is an organic colloidal substance with the function of absorbing and storing water. Humic acid has a large cation exchange capacity and strong adsorption buffering and chelating capabilities. It can improve the utilization rate of nutrients in the soil and buffer acid and alkali hazards. Humic acid is an organic macromolecular colloid with strong water absorption and water storage functions. The water absorption rate of clay particles is generally 50%-60%, while the water absorption rate of humic acid substances can reach 500%-600%. Therefore, using humic acid Acid fertilizers help improve soil moisture conditions.

2. Humic acid can improve soil structure: What determines soil fertility is the organic-inorganic complex. Inorganic mineral colloids generally contain more than 95% of the soil, which has a certain impact on soil basic fertilizers and cannot be changed by artificial measures. Organic colloids are humic acid substances, which are generally It only accounts for about 5% of the organic-inorganic complex, but it plays an equally important role as mineral colloids, and can be regulated by artificial measures, such as applying organic fertilizers, using humic acid soil conditioners and soil improvement fertilizers, to increase the soil content. The content of humic acids in the soil, the application of humic acid becomes a binder for the formation of soil aggregate structure, improves the organic-inorganic composite degree of soil, increases the soil’s large-size water-stable aggregates, and improves the soil structure. Therefore, The application of humic acid fertilizers can effectively improve the physical structure of various soils. Therefore, humic acid is said to be a high-quality soil conditioner.

3. Spraying humic acid liquid fertilizer on the leaves can reduce stomatal conductance and reduce water transpiration and loss. According to the test, when fulvic acid was sprayed on wheat, the stomatal conductance of the wheat leaves was reduced by 33.7% compared with the control. According to research from the Henan Academy of Agricultural Sciences, spraying fulvic acid on wheat not only reduces the stomatal conductance of the leaves, but also reduces the opening and closing of the stomatal openings of the wheat. It also provides nutrients to the wheat.

4. Humic acid can stimulate the growth of crop roots and enhance the water absorption capacity of roots. Humic acid contains a variety of chemically active and biologically active functional groups, which can stimulate the growth and development of crops. It can cause early seed germination, early emergence, early flowering and early fruit setting. It can also increase root length, root mass and root vitality. , enhance the ability of crop roots to absorb nutrients and water.

5. Humic acid can enhance the physiological regulation function of plants and improve the cold resistance of crops.

In summary, humic acid and humic acid-based fertilizers can improve soil structure, improve soil physical and chemical properties, enhance soil water and fertilizer retention capabilities, stimulate crop root growth and development, increase water absorption capacity, and reduce leaf water transpiration and loss. , enhance the ability of crops to resist adverse environments and improve water and nutrient utilization.