1. Humic acid
Humic acid is the remains of plants and animals, mainly through microbial decomposition and transformation of plant debris, and a series of complex chemical reactions, forming organic matter. From the micro perspective, it is composed of aromatic and a variety of functional groups of organic polymer, is mainly composed of carbon, hydrogen, oxygen, nitrogen and sulfur elements, is a kind of multivalent polycondensate type phenolic aromatic compounds and nitrogen compounds. Its function is good physiological activity and absorption, complexation, exchange and so on. It is widely distributed in low-grade coal, animal waste, organic fertilizer, soil, water sediments, animal and plant residues.
We see the black soil, because of its containing humic acid, coal at a low level, such as weathering coal, lignite, peat humic acid content in the highest (30% 80%), followed by organic compost content is 5% - 20%. Each artificial oxidation, such as air, ozone or nitric acid treatment, can form regeneration humic acid.
According to the solubility and color classification in solution, it can be divided into three groups: first, the part that is soluble in acetone or ethanol is called brown rot acid; Second, insoluble in acetone is called black rot; Third, the part that is soluble in water or dilute acid is called yellow rot.
It is used for agriculture as a nutrition additive, root and root fertilizer additives, soil conditioner, plant growth regulator, foliar fertilizer compound, anti-cold agent, drought-resistant agent, compound fertilizer synergist, etc. Humic acid fertilizer, which is combined with nitrogen and phosphorus, has the function of increasing efficiency, improving soil, stimulating the growth of crops and improving the quality of agricultural products. Magnesium humate, zinc humate, humic acid and urea were found to have good effect in supplementing soil deficiency of magnesium, zinc deficiency and iron deficiency in fruit trees. The combination of humic acid and herbicide, atrazine and other pesticides can improve the efficacy and inhibit the detoxification. Sodium humate is effective for the treatment of apple tree rot.
2. Fulvic Acid
Broad sense is the plant growth regulator, can promote plant growth is particularly appropriate control of crop leaf stomatal openness, reduce transpiration, against drought has important effect, can improve the ability of art, to increase production and improve quality, main application object for wheat, corn, sweet potatoes, corn, rice, cotton, peanuts, rapeseed, tobacco, silkworm, melons and fruits, vegetables, etc.; Can be mixed with some non - alkaline pesticide, and often synergistic effect.
3. Amino acids
Amino acids have three roles in plant growth: first, the supplemental source of organic nitrogen nutrition; Second, the chelating agent of metal ions. Amino acids have the function of the chelating metal ion, easy to plant in the required amount of elements and trace elements (calcium magnesium iron manganese zinc copper molybdenum boron, etc.) to the plant to carry the body, improve the utilization of plant for a variety of nutrients; Third, enzyme promoting preparation. Amino acids are promoters and catalysts for the synthesis of enzymes in plants, which play an important role in plant metabolism. However, amino acids are easily assimilated/decomposed by bacteria in the soil, so they should not be used as a base fertilizer in the soil. Instead, it is made into leaf surface fertilizer, which is sprayed on the leaves to allow plants to absorb amino acids and other elements directly through the leaves.