The advantages of flushing fertilization mainly include the following points:
1, improving soil exchange capacity
Humic acid in water-soluble fertilizer has high cation exchange capacity, which is more than 10 times higher than that in general soil. After being applied to soil, the adsorption capacity of soil for anions was significantly improved, and the salt content in the surface layer was reduced.
2. Promote the formation of soil aggregates
Soil aggregate is the basic unit of soil structure. Using humic acid water-soluble fertilizer can change the physical and chemical properties of soil with high salt content, strong alkalinity, high dispersion of soil particles and poor soil structure, promote the formation of soil aggregates and keep them in a good state, thus creating good conditions for the growth and development of plant roots.
3. Reduce the salt content of topsoil.
The application of humic acid water-soluble fertilizer can loosen the topsoil, destroy the salt accumulation, reduce the salt content of topsoil, play a role of salt separation, improve the emergence rate, reduce weak seedlings and dead seedlings, and make plants grow healthily.
4. Reduce the pH of saline-alkali soil.
Irrigation and fertilization can neutralize alkalinity, reduce and eliminate the harm of alkalinity to soil and plants, improve low-yield saline-alkali land and create good soil conditions for crop seedling growth.