The Relationship between Humic Acid and Soil
There are about 4 trillion tons humus (humic substance) on the earth and it is an important part of the soil. Humic acid is the most active component of soil humus, which plays a key role in the formation, properties and fertility of soil. In short, the relationship between humic acid and soil is as follow,
- Active participant and promoter of soil formation.
- Mediator that restrict or promote the migration, fixation and leaching of soil metal ions and trace elements.
- Stabilizer of soil structure.
- The determinant of increasing soil salt-base exchange capacity.
- A natural water-retaining agent for soil.
- Protector of soil fertility and storehouse of plant nutrients.
At present, protecting humic acid and restoring soil humus layer have become one of the main goals of environmental restoration in ecologically fragile areas, and also an important task for sustainable agricultural development and harmonious ecological environment.