Difference in smell
Mineral potassium humate: no smell
Biochemical potassium humate: sugary, smelly
Comparison of shortcomings
A. Mineral potassium humate
① There is an anti-flocculation limit. Conventional mineral potassium humate anti-flocculation is in 18-25 degree hard water. Flocculation mainly refers to the complexation reaction with calcium ions and magnesium ions, and the resulting macromolecular structure is insoluble in water. Therefore, in the market promotion of mineral potassium humate, it is recommended to do an anti-flocculation test, and it is recommended to dissolve it in water together with calcium nitrate, including in some large-element water-soluble fertilizers. If the aqueous solution can be maintained for more than one day, it can be considered for purchase and use. In addition, if the compound fertilizer is not a chelating calcium, magnesium and copper ion, it is not recommended to compound it directly, and an anti-flocculation test is required before use. The best way is to dissolve and use them separately to avoid flocculation and blockage of drip irrigation or sprinkler ports.
② The price of mineral potassium humate is relatively high. The cost of raw materials, including lignite weathering lignite, potassium hydroxide, etc., are all at a very high price when transported to production enterprises. In addition, the production cost of mineral potassium humate is generally high due to reaction, impurity disposal, drying, equipment loss, and personnel costs.
B. Biochemical potassium humate
① It must be used in large quantities to be effective.
② It is easy to breed bacteria. It can be seen that its three production processes require the addition of bacterial agents for fermentation. It is difficult to control the strain of bacteria. The sugar content is relatively high, and it is particularly easy to breed bacteria.