Potassium fulvate is a macromolecular aromatic carboxylic acid substance with active functional groups (phenolic hydroxyl, carboxyl, phenolic, etc.) level and metabolic capacity. Secondly, the factors such as day, p, and so on include adsorption, contact, merger, ion exchange, etc.

It has inhibitory effect on urea decomposition and nitrate decomposition enzymes in soil.

The raw materials of compound fertilizer and compound fertilizer are mainly urea, which is amide nitrogen. After being applied to the soil, it must be converted into ammonium nitrogen and nitrate nitrogen under the action of urease before it can be absorbed and utilized by crops. Fulvic acid It has inhibitory effect on urease and nitrase, and improves the utilization rate of amide nitrogen.

Fulvic acid can improve the effect of phosphate fertilizer.

Potassium humate and phosphate fertilizers form fulvic acid-metal-phosphate conjugates, such as iron fulvic acid, aluminum fulvic acid, and phosphorus fulvic acid. After the conjugate is formed, it prevents soil from fixing phosphorus and is easy to absorb crops. , Improve the utilization rate of phosphate fertilizer, the utilization rate has increased from the original 10% to 20% to 28% to 39%. In the soil, the phosphate fertilizers are generally monoammonium phosphate and 2ammonium phosphate, which are easy to fix in the soil, so the utilization rate is low. After adding fulvic acid, a 3-membered stable structure is formed, so that phosphorus, iron, calcium, magnesium, aluminum, etc. can form 3-membered conjugates and stings, and improve the utilization rate of phosphorus.

Fulvic acid can promote the release of insoluble potassium and improve the release of soil available potassium, especially water-soluble potassium. At the same time, it can reduce the fixation of potassium fertilizer. The corrosive acid combines with potassium ions, and the solidified potassium in the soil is released, which cannot be absorbed and utilized by crops. , which is absorbed and utilized by crops, greatly improves the utilization rate of potassium, and reduces the loss of potassium and soil fixation.