Humic Acid腐植酸
Humic acid is a natural macromolecular organic substance formed from plant and animal residues through microbial decomposition and geochemical processes. It is extracted mainly from peat, lignite and weathered coal, and it stimulates plant growth, improves soil fertility and increases nutrient availability.
Key points
- Under NY 1106-2010, a solid macro-element water-soluble fertilizer containing humic acid must contain at least 3.0% humic acid and 20% macro elements, with water-insoluble matter no more than 5%, moisture no more than 5.0% and pH (1:250) between 4.0 and 10.0.
- For the liquid macro-element type the same standard requires humic acid ≥30 g/L and macro elements ≥200 g/L, with water-insoluble matter ≤50 g/L; the solid micro-element type requires humic acid ≥3.0% and micro elements ≥6%.
- Heavy metal limits (as the element): arsenic ≤10, cadmium ≤10, lead ≤50, chromium ≤50 and mercury ≤5 mg/kg.
- Under GB 18382-2021, humic acid and organic matter content must not be counted in the total nutrient content and must be declared separately.
Related terms
Seaweed Extract
Seaweed extract is a natural polysaccharide material obtained from brown…
Amino Acid Water-soluble Fertilizer
An amino acid water-soluble fertilizer is a water-soluble fertilizer bas…
Soil Conditioner
A soil conditioner is a material applied to soil to improve its physical…
More in this category
Bio-organic Fertilizer
A bio-organic fertilizer combines specific functional micro-organisms wi…
Coated Fertilizer
A coated fertilizer is one in which the fertilizer granules are covered …
Controlled Release Fertilizer
A controlled release fertilizer is a slow or controlled release fertiliz…
Fertilizer Synergist
A fertilizer synergist is a material added to fertilizer to improve nutr…
Foliar Fertilizer
A foliar fertilizer is applied to the leaf surface and taken up through …
Microbial Fertilizer
A microbial fertilizer is a product containing specific living micro-org…
Nitrification Inhibitor
A nitrification inhibitor is a compound, such as DMPP or DCD, that slows…
Plant Biostimulant
A plant biostimulant is a substance or micro-organism that stimulates pl…
Related companies
- Category：New-type fertilizer
- Definition basis：NY 1106-2010 Water-soluble Fertilizers Containing Humic Acid
Updated：Oct 16, 2026