Humic acid has a wide range of uses in agriculture.Humic acid is a good biological activity. The organic carrier, which is composed of a plurality of functional groups, is also an intermediate substance with the function of plant respiration and photosynthesis. So that it has a large capacity and can be combined with a plurality of substances.
The humic acid uses in agriculture has the following two aspects:
Humic acid used as pesticides synergist.
The humic acid and the pesticide are mainly combined with the interaction of ionic bonding, hydrogen bonding, proton transfer, electron transfer, complexation and the like, and a novel pesticide polymer complex is generated, which is the humic acid environment-friendly pesticide.
The research and practice show that the humic acid is compounded with the insecticide, the bactericide and the herbicide. So that the effect of enhancing the drug effect and reducing the toxicity can be achieved. The invention is characterized in that the humic acid can act as a surfactant. The surface tension of the metal salt of the humic acid is lower than the surface tension of the water, obvious dispersion and emulsification effects of the pesticide can be generated, and the dissolving capacity of the soluble pesticide can be improved.
And the synergistic effect is as follows: The humic acid can enhance the absorption of the plant to the pesticide. Can improve the biological activity of the pesticide and the plant growth regulator, can obviously improve the effect of the pesticide. And the sustained-release action: The humic acid has obvious inhibition effect on the decomposition rate of the pesticide.
And the higher the amount of the humic acid is, the slower the speed is. The effect of reducing the toxicity is that the humic acid can passivate the activity of the pesticide-sensitive enzyme in the biological medium. And the activity of the enzyme which can antagonize the pesticide is excited, and the toxicity in the pesticide is relieved and reduced.As a new type of fertilizer, organic-inorganic compound fertilizer is becoming the development direction of ecological agricultural fertilizer in the 21 st century.
Humic acid used as soil conditioner.
1）The humic acid can be used for changing the physical and chemical properties of high salt content, alkaline overstrong, soil grain highly dispersion and structural difference of the physical and chemical properties soil. And promoting the formation of the soil aggregation body so as to be in a good state. So as to create favorable conditions for the growth and development of the plant root system.
2）The application of humic acid can loose the ploughing soil, destroy the accumulation of salt. Reduce the salt content of topsoil, play the role of salt isolation. Increase the emergence rate, reduce the weak seedling and dead seedling, and make the plant grow healthily.
3）Humic acid has a high amount of cationexchange capacity, more than 10 times higher than the general soil. After application into the soil, the adsorption capacity of the soil to anions was significantly increased. And the salt content in the surface layer was reduced.
4）Saline-alkali land, especially alkaline soil, has too high ph (above 9.0), which directly endangers crop growth and even causes death. In addition, too high ph also affects the availability of nutrients such as phosphorus, iron, manganese, boron and zinc in soil. While humic acid ph 6.8 weak acidity, can neutralize alkalinity. Reduce the harm of eliminating alkalinity to soil and plants, make low yield saline-alkali land improved. And create good soil conditions for crop seedling growth.