Humic acid is a “naturally produced” organic fertilizer with the highest organic content and the best correlation effect. It is both a soil improver and a slow-release agent for fertilizers. The combination of humic acid and fertilizers can achieve a 1 + 1> 2 Integrated effect, which is also a specific effect that no fertilizer can have.


The combined effect of multiple functions of humic acid is as follows:

1. Humic acid is an organic colloid substance with water absorption and storage functions

The humic acid cation exchange capacity is large, and it has strong adsorption buffering and chelating ability, which can improve the nutrient utilization rate in the soil and buffer the harm of acid and alkali. Humic acid is an organic macromolecular colloid with strong water absorption and storage functions. The water absorption of clay particles is generally 50% -60%, while the water absorption of humic acids can reach 500% -600%. Acid fertilizers help to improve soil moisture conditions.

2. Humic acid can improve soil structure

Organic-inorganic complexes determine the fertility of soils. Inorganic mineral colloids generally contain up to 95% or more in the soil, which has a certain impact on soil basic fertilizers and cannot be changed by artificial measures. Organic colloids are humic acids, generally, only It accounts for about 5% of the organic-inorganic complex, but it has the same important role as mineral colloids. It can be adjusted by artificial measures, using organic fertilizers, using humic acid soil improvers and soil-improving fertilizers, and increasing soil humus The content of quality acids, humic acid application becomes a binder for the formation of soil aggregate structure, which improves the organic-inorganic composite degree of soil, increases the large-scale water-stable aggregates of soil, and improves the soil structure. Therefore, the application of humus Acid fertilizers can effectively improve the physical structure of various soils. Therefore, humic acid is said to be a good soil improver.

3. Foliar spraying of humic acid liquid fertilizer can reduce stomatal conductance and reduce water transpiration and loss.

According to the experiment, the foliar stomatal conductance of wheat was reduced by 33.7% compared with the control. Henan Academy of Agricultural Sciences has researched that spraying wheat with fulvic acid not only reduces the leaf surface stomatal conductance, but also reduces wheat stomata opening and stomata closure, and also provides nutrients for wheat.

4. Humic acid can stimulate crop root growth and enhance water absorption capacity of the root system

Humic acid contains a variety of chemically and biologically active functional groups, which can stimulate the growth and development of crops. It can make the seeds germinate, emerge early, flower early, and set fruit early. At the same time, it can increase root length, root volume and root vigor To enhance the ability of crop roots to absorb nutrients and water.

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

The application of humic acid fertilizer can enhance the enzyme activity in the soil and plant body, regulate the physiological and metabolic functions of the crop and enhance the crop’s adaptability to adverse environmental conditions.

In summary, humic acid and humic acid fertilizers can improve the soil structure, improve the physical and chemical properties of the soil, enhance the soil’s ability to retain water and fertilizer, stimulate crop root growth and development, increase water absorption, and reduce leaf water transpiration and loss. Enhance the ability of crops to resist adverse environments, and improve the utilization of water and nutrients.

Post time: Apr-01-2021