For nitrogen: Since humic acid has a salt exchange capacity many times higher than soil, it can adsorb a large amount of ammonium ions to reduce the loss; at the same time, humic acid has a good inhibitory effect on urease and nitrifying bacteria, and can greatly increase urea. Sustained release and use efficiency.
Phosphorus: It can react with the fixed phosphate fertilizer in the soil to convert it into effective phosphorus; it has a protective effect on phosphorus, can improve the utilization rate of phosphate fertilizer in the current season; and can also improve the mobility of phosphorus.
For potassium: It has a strong adsorption effect on K+, which can reduce the loss; it has a certain dissolution effect on potassium-containing minerals such as potassium silicate and potassium feldspar, thereby increasing the effective potassium content in the soil.
2, humic acid can improve soil aggregate structure, ph, modulating heat, microbial growth, pollution reduction - the environment
It can improve the structure of soil aggregates: the colloidal properties of humic acid have good adhesiveness, which is beneficial to the formation of more and better soil aggregate structure.
Adjusting the pH of the soil: Since humic acid is a multi-weak acid, it has a strong buffering property, so it can play a role in mediating the pH of the soil, and then convert nutrients and trace elements into a form that can be absorbed by plants.
Dimming heat: Since humic acid has a deep black color, it is equivalent to laying a black mulch on the soil after being applied to the soil, which improves the photothermal performance of the soil and is beneficial to increase the ground temperature.
Improve bacterial activity: In the soil of the compacted soil, humic acid can interact with beneficial bacteria in the soil to make the soil a soft structure and promote the absorption of water nutrients and oxygen by plants.
Reduce heavy metal pollution: In acidic soil environments, humic acid reacts with heavy metals to reduce heavy metal pollution.
3. Stimulate crop growth, promote rooting, and enhance photosynthesis - for crops
4, pesticide synergy to reduce residues
Humic acid can increase the persistence of pesticides and herbicides while reducing pesticide residues.