At present, the potassium sources that water-soluble fertilizer manufacturers generally use in the production and development of water-soluble fertilizers are: potassium chloride, potassium sulfate, potassium nitrate, potassium fulvic acid, potassium dihydrogen phosphate, etc., and the potassium content of these potassium sources How many are there? How effective is it used?

Potassium chloride

The potassium content is generally 50-60%, white or red crystalline powder, odorless and salty.

Potassium chloride is rich in potassium, and the processing is relatively low, so the price is relatively low. Water-soluble fertilizer produced with potassium chloride as raw material, after use, potassium ions are easily absorbed by soil colloids and quickly absorbed by crops, but long-term use It is easy to cause calcium deficiency in crops, causing fruit cracking, rotten heads, yellow leaves and other phenomena.

Potassium sulfate

Potassium content is 45%-52%, while sulfur content is 18%, and chloride ion content is ≤3%. It is a chemically neutral, physiologically acidic fertilizer with good water-soluble fertilizer properties, but long-term use will increase soil acidification and is not conducive to the growth of crop roots. It is widely used in vegetables, fruit trees, tobacco, tea trees and other crops that are sensitive to chloride ions, but should be used sparingly in calcareous soil areas, because sulphate ions and the insoluble calcium sulfate in the soil are not conducive to crop absorption.

Potassium nitrate

The potassium content is generally 44.5%, while the nitrogen content is 13.5%, and the chloride ion content is ≤1.5%. White or light-colored crystalline powder.

Potassium nitrate has low hygroscopicity, is not suitable for agglomeration, and is easy to use. It is a good water-soluble potassium source. It is not easy to cause soil acidification after long-term use. With good physical properties, the price is higher than potassium chloride and potassium sulfate. It is a high-quality and efficient potash fertilizer.

Potassium Fulvic Acid

Fulvic acid content ≥50%, potassium oxide content is about 11%, mostly brown powder, non-toxic, sweet smell.

As a kind of humic acid, potassium fulvic acid is a short carbon chain molecular structure substance extracted from natural humic acid. It is the smallest molecular weight and most active component in humic acid. It is the essence of humic acid's active ingredients. The price is also very expensive!

Potassium Dihydrogen Phosphate

It contains 52% phosphorus and about 34% potassium. The appearance is white crystal or powder. It is chemically stable, odorless, tasteless, non-toxic, soluble in water, and does not agglomerate.

Potassium dihydrogen phosphate contains both phosphorus and potassium at the same time, without impurities, can be completely absorbed and utilized by crops without side effects, and the price is relatively high. It is a large number of element water-soluble fertilizer raw materials used by many high-end water-soluble fertilizer manufacturers.