Humic Substance and Soil Fertility
Soil is the main hub of material exchange and energy conversion in the earth's surface ecosystem and the material basis for human survival and development. Soil quality is the fertility quality of soil to provide plant nutrients and produce biological substances. It is a comprehensive measure of environmental quality to absorb and purify pollutants, protect water and air, and maintain and safeguard human, animal and plant health. Soil quality includes fertility quality, environmental quality and health quality, which are related to the quality and safety of agricultural products. It has long been proved that humic acid is an important guarantee to build soil fertility, stabilize soil quality and maintain soil safety.
Soil fertility refers to the supply of all the elements needed for crop growth and development, but also the fundamental characteristics of soil. Humic Substances, especially Humic Acid, which accounts for more than 60% of soil organic matter, is the core substance of soil organic matter and plays a decisive role in soil fertility. Soil organic matter or Humic Substance content is usually regarded as one of the main indexes to measure the level of soil fertility.
Soil organic matter is completely replenished by natural extinction of plants under natural conditions. Even if a large amount of primary organic matter is applied every year, the percentage of conversion to Humic Substance is small. Moreover, the decomposition and consumption of these young HS is faster, so the accumulation of HS in soil is a very long process. In order to increase and maintain soil Humic Substance, the world is seeking new and more stable sources of Humic Substance, among which high content of Humic Acid is the most ideal choice.