Mechanism of Humic Acid for Promoting Plant Growth
Studies show that humic acid based fertilizers can increase the yield of general field grain and oil crops by 8% to 20% and the yield of melon, fruit and vegetable cash crops by 15% to 35%.
The action of humic acid is divided into three aspects: physical action, chemical action and biological action.
Firstly - Physical action is mainly manifested in improving soil structure and prevents soil cracking. Increase soil moisture capacity and improve cold resistance. Darkens the soil and helps the sun absorb energy.
Secondly - Chemical action is mainly manifested in adjusting soil PH value. Improve and optimize plant nutrition and water absorption. Increase soil buffer capacity. It is a natural chelating agent (chelating with metal ions to promote absorption by plants) in alkaline conditions. It is rich in organic matter and minerals essential for plant growth. Improve the solubility of organic fertilizer and reduce the loss of fertilizer. To convert nutrients into a state that is easily absorbed by plants. It can enhance the absorption of nitrogen by plants, reduce the fixation of phosphorus, store the protective box of nitrogen, phosphorus, potassium and other elements deep into the soil in the soil, accelerate the process of nutrient elements entering the plant body, and improve the application effect of inorganic fertilizer.
Thirdly - Biological action is mainly manifested in stimulating the growth and reproduction of beneficial microorganisms in soil. Improve plant natural resistance to disease and insect pests.