1. Formation of rented soil aggregates
Soil aggregates are the basic position of soil structure. They are large soil particles composed of single soil particles bonded by organic and inorganic colloids such as soil humus and clay. Good agglomerates are not easy to disperse when exposed to water, are not easily broken by mechanical pressure, are loose and porous, and can regulate the water, fertilizer, gas and heat of the soil. As a kind of organic colloid, coal humic acid can promote the formation of soil aggregates, improve the structure of soil, and make soil aeration and water permeability. It creates favorable conditions for accelerating the elution of soluble salts and root growth. .
2. Reduce the salt content of topsoil
Concentrated application of humic acid substances, gram transport of ploughed soil, destruction of salt along the soil capillary pores with the rise of water conditions, reduce the accumulation of topsoil salt, reduce the salt content of the topsoil, that is, a "separation of salt" role, can alleviate The harm of saline to alkali on crop seedlings, increase the emergence rate and reduce weak seedlings and dead seedlings.
3. Improve soil exchange capacity
Humic acid has a high cation exchange capacity, which is more than 10 times higher than that of ordinary soil. After being applied to the soil, the ability of the soil to adsorb harmful ions is significantly improved.
4. Reduce the pH of saline-alkaline soil
The application of the fertilizer can improve the physical and chemical properties of the soil, inhibit the increase of salt, neutralize the soil alkalinity, reduce the salt-alkali hazard through the adsorption of cations, and create good soil conditions for the growth of crop seedlings, which is the improvement of low-yield saline-alkali soil.