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Types and applications of potash

JIUXU INDUSTRIAL (HK) CO., LIMITED | Updated: Jul 03, 2018

Compared with the nitrogen and phosphorus elements, due to the relative lack of potassium resources in China, potash has also become a relatively high-priced variety of large fertilizer varieties, and even once became the price that affected the entire fertilizer market. Although potassium is one of the main demand elements of plants, the situation of potassium deficiency in different regions is different, and the demand for potassium in different crops is different. Therefore, dealers must rely on soil testing results in grassroots agrochemical services, according to the different needs of crops. The amount of scientifically matched potassium.

Potassium fertilizer can be divided into two major categories: industrial potash and other potash. Among them, industrial potassium fertilizers include: potassium sulfate, potassium chloride, potassium nitrate, potassium phosphate, potassium magnesium fertilizer, potassium and calcium fertilizer, and the like. Other potash fertilizers include grass ash, kiln ash potassium fertilizer, and organic potash fertilizer.

Potassium sulphate: containing K2O 50%~52%, soluble in water, physiological acid fertilizer. After being applied to the soil, potassium is in an ionic state, a part is directly absorbed and utilized by the plant, and a part is exchanged with cations on the soil colloid, and calcium sulfate and sulfuric acid are formed. Therefore, after a large amount of potassium sulfate is applied, it is necessary to prevent soil compaction. On the one hand, organic fertilizer can be added, and on the other hand, lime can be added to neutralize acidity.

Potassium sulphate can be used as base fertilizer and top dressing. Because potassium has poor mobility in the soil, it is more suitable as a base fertilizer. When topdressing, apply a dense layer of crop roots. Potassium sulphate is particularly effective for sulfur-tolerant crops such as cruciferae. Because of its high price, in addition to avoiding chlorine crops, farmers can choose potassium chloride as much as possible.

Potassium chloride: containing K2O 50%~60%, soluble in water, rapid fertilizer efficiency, physiological acid fertilizer. Calcium chloride is formed in neutral soil, causing leaching of calcium loss; calcium carbonate in calcium soil reacts with potassium chloride to neutralize and release effective calcium; hydrochloric acid is formed in acidic soil. Enhance soil acidity, increase acid and aluminum toxicity, and apply lime and organic fertilizer.

Potassium chloride can be used as base fertilizer and top dressing. It is not suitable for seed dressing. It is not suitable for the application of chlorine-based crop-grade saline-alkali land. For cotton and linen fiber crops, products and quality can be improved.

Grass ash: Contains a variety of plant ash elements, including: potassium, calcium, phosphorus, magnesium, sulfur, iron, silicon and other plant nutrients. Potassium is present in the form of potassium carbonate, potassium sulfate, potassium chloride, and phosphorus is present in the form of weakly acid soluble phosphorus. It is an alkaline fertilizer. Do not mix with ammonium nitrogen fertilizer. It should not be mixed with manure, manure or other organic fertilizers, which may cause nitrogen to volatilize. Saline-alkali plants contain sodium and chloride ions in the plant ash, which is easy to increase soil salinity.

Grass ash can be used as base fertilizer, top dressing, and cover fertilizer. The amount of base fertilizer is 50~100 kg/mu, and the dosage of topdressing is 50 kg/mu. It can be mixed with 2~3 times of fine soil before application, and can also be made into 10%~20% water extract as potassium and trace elements. Nutrient solution for foliar application

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