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What are the common potassium fertilizers? How to apply potash fertilizer? Application skills and precautions.

What are the common potassium fertilizers? How to apply potash fertilizer? Application skills and precautions.

Dec 7,2020
What are the common potash fertilizers? How to apply potash fertilizer? What problems should be paid attention to during the application of potash fertilizer? It is reported that potash fertilizer is one of the important fertilizers necessary for crops. Potassium fertilizer can promote crop nutrient transfer, fruit enlargement, tissue maturity, accelerate growth and improve resistance.

Potassium sulfate

White or light yellow crystal, soluble in water, low hygroscopicity. It can be used as base fertilizer or top dressing. It is suitable for all kinds of crops, especially the crops that avoid chlorhispotash. The application should be concentrated.

Potassium nitrate

White powder or crystal, soluble in water, low hygroscopicity. Because it has other functions, it is generally difficult to buy on the market.

Potassium dihydrogen phosphate is colorless to white crystal or crystalline powder, soluble in water, stable in air. At present, it is mostly used for seed soaking and extra-root topdressing.


It can be used to dress seeds, dip roots, and can also be applied to the soil. The application of inoculants is actually to inoculate the roots of the crops, so that the silicate releases potassium, phosphorus, silicon, iron and other elements in the soil around the roots for the roots to absorb and utilize.

How to apply potash fertilizer

When potassium-requiring crops are in the rapid growth period, spray on foliage. When the root system of the crop is developing, apply deep layer. Commonly used conservation tillage leaves more crop residues on the surface of the soil, and also causes a higher concentration of potassium to accumulate on the surface of the soil and cannot penetrate deep into the soil. When the soil moisture is good, the potassium can infiltrate smoothly, but when the soil is dry, it will limit the absorption of potassium. As crops take root deeper below the potassium-rich soil layer in order to get enough water, this dislocation can cause crops to lack potassium. In this case, deep application of potassium fertilizer can significantly increase the availability of potassium.

The location of other nutrients also determines how much potassium the crop roots can reach. Nitrogen and phosphorus can stimulate the branching of crop roots, where the concentration of these nutrients is higher, the proportion of roots will be higher. Applying potassium fertilizer, nitrogen fertilizer and phosphate fertilizer in the same furrow can increase the chance of root contact with potassium.

Potash fertilizer application skills and matters needing attention

Reasonable match

For tobacco, sugar crops and fruit trees, it is better to use potassium sulfate; due to the high cost of potassium sulfate, potassium sulfate can be used in cash crop fields. Generally, field crops should use cheaper potassium chloride except for a few crops sensitive to chlorine.

Apply to soil

Potassium fertilizer should be put first in areas where the soil is severely lacking in potassium. From the perspective of soil texture, the potassium content of sandy soil is often low, and potassium fertilizer should be added; the potassium content of clay soil is often high, and it can be used less or not. Potassium sulfate can be applied to soils lacking potassium and sulfur, but potassium chloride cannot be applied to saline-alkali soils.

Due to crop application

Used in rainy areas or areas with good irrigation and drainage conditions, potassium chloride can be applied to most crops, and potassium chloride is not suitable for a few cash crops to improve their quality.