Vital Functions of Humic Acid Substances in the Nitrogen Cycle
- Humic acid can be complexed and adsorb inorganic nitrogen.
- Humic acid participates in the inorganic nitrogen transformation.
- Humic acid promotes the mineralization of organic nitrogen.
- Humic acid promotes the absorption and distribution of nitrogen in plants.
- Humic acid stabilized urease activity.
- Humic acid improves the ability of biological nitrogen fixation.
- Humic acid can change the number of microorganisms associated with the nitrogen cycle.