The Function of Humic Acid in Soil Improvement
Nowadays, many farmers put more inorganic fertilizers than organic fertilizers in soil, which results in the decrease of soil fertility due to the destruction of soil structure and the increasing salinization of soil. As an excellent organic matter, humic acid plays an important role in soil improvement.
Humic acid fertilizer can promote the formation of soil aggregate structure, improve the structure of soil, and improve the moisture retention and permeability of soil.
Structurally, humic acid has a variety of functional groups that can regulate soil PH and fix toxic heavy metals on the soil surface by chelating reduction, so as to reduce the toxicity of heavy metals. In addition, humic acid can also provide sufficient carbon source and energy for soil microorganisms and improve soil microbial activity.