What Is Potassium Fertilizer? A Detailed Introduction to Common Types

Potassium fertilizer is a kind of fertilizer that farmer friends cannot do without in their daily work, but in fact many friends do not know what potassium fertilizer really is? What types are there? Let us take a simple look together below.

What is potassium fertilizer?

Potassium fertilizer, full name potassium nutrient fertilizer. A fertilizer with potassium as its main nutrient. Potassium in plants generally accounts for 0.2%~4.1% of dry matter weight, second only to nitrogen. During the process of plant growth and development, potassium participates in the activation of more than 60 enzyme systems, photosynthesis, transport of assimilates, metabolism of carbohydrates and synthesis of proteins and other processes.

What types of potassium fertilizer are there?

Potassium fertilizer has two major categories, one is single-element potassium fertilizer, and the other is compound fertilizer containing potassium. Common single-element potassium fertilizers include potassium chloride, potassium sulfate and potassium silicate.

Potassium chloride: divided by place of origin, there are red and white types; in appearance there are block, powder and irregular granular forms; potassium oxide, domestically produced is 57% or 60%.

Potassium sulfate: generally white crystalline granules or powder. Some products are slightly off-color due to impurities. Domestic potassium sulfate includes Luobupo-produced or Taiwan, China-produced, generally containing K2O at 50%, German-produced at 54%.

Potassium silicate: dark gray powder, an industrial by-product, its content can only be confirmed through testing, generally K2O is 10%~14%, and it is alkaline.

For common potassium-containing compound fertilizers, the potassium content of ternary compound fertilizer can be seen from the description on the packaging bag: N-P2O5-K2O. Binary chemical compound fertilizer - potassium nitrate: white crystalline granules, rare on the market.

Kiln ash potassium fertilizer is a by-product of the cement industry. Depending on the cement manufacturer, the potassium oxide content of kiln ash potassium fertilizer also differs; the low content is about 8%, and the high content can reach more than 20%. Kiln ash potassium fertilizer also contains calcium, magnesium, sulfur, iron and various other trace elements. It is an alkaline quick-acting chemical fertilizer and can be used as base fertilizer and topdressing, especially suitable for application in acidic and slightly acidic soil. It cannot be mixed with ammonium nitrogen fertilizer or superphosphate, so as to avoid causing loss of ammonium nitrogen and reducing the effectiveness of phosphorus.

Plant ash contains a variety of ash elements, such as potassium, calcium, magnesium, sulfur, iron, silicon, etc. Among them, potassium and calcium are high, followed by phosphorus. Plant ash can be applied as base fertilizer and topdressing. Applying it by broadcasting in early spring has the best effect; it can not only meet the needs of fruit trees for growth and development, but also increase soil temperature, which is beneficial to root growth. Plant ash is alkaline and cannot be mixed with ammonium nitrogen fertilizer for application, so as to avoid volatilization of ammonia.

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