Humic acid is an antidote to pollutants
The safe production of agricultural products and the environmental quality of agricultural production areas bear the brunt.
Humic acid is rich in reactive functional groups such as carboxyl groups and phenolic carboxyl groups. Its strong adsorption to metal ions and organic pollutants is of great significance for alleviating heavy metals and organic pollution. Studies have shown that in a solution containing 50 mg of mercury per liter, at pH = 2, the adsorption of mercury on the peat can reach 90%, and the adsorption amount of copper in the aqueous ammonia solution can reach 100%.
Soluble chromium and cadmium are highly toxic heavy metals. Studies have shown that at lower pH, the reactive functional groups in humic acid act to reduce Cr (VI) to Cr(III), ultimately Cr is adsorbed by the soil colloid in the form of humic acid chelate, thereby promoting a significant decrease in the chromium concentration in the soil solution. Therefore, after the application of humic acid, the toxic heavy metal ions in the soil undergo adsorption reaction, thereby significantly reducing the toxicity.
Humic acid can adsorb organic pollutants such as polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, herbicides, etc. through hydrophobic interaction, coordination exchange and hydrogen bonding, and reduce its active concentration in the environment by fixed precipitation, reducing its activity. Environmental pollution; macromolecular organic compounds can also be degraded into small molecular organic compounds by redox.
In addition, after being applied to the soil, it can also enhance the self-purification ability of the soil by stimulating the activity of microorganisms and enzymes in the soil, thereby indirectly promoting the degradation of organic matter; or enhancing the plant by promoting the growth of plants and the physiological and metabolic functions of the plants themselves. The ability to degrade and purify organic pollutants.
Humic acid is a promoter of plant growth
Soil application of humic acid fertilizer or foliar application of humic acid can increase seed germination rate and germination potential, stimulate crop root growth, increase metabolic enzyme activity in plants, enhance crop stress resistance, and improve photosynthesis efficiency.
The quality of agricultural products is significantly improved. The effect of humic acid on plant growth is similar to that of phytohormones. Therefore, for recipient plants, humic acid is a regulator or promoter of plant growth.