Potassium sulphate is white crystalline or colored crystalline granules, characterized by small moisture absorption, not easy to agglomerate when stored, soluble in water, suitable for a variety of crops, can be used as base fertilizer, top dressing, seed fertilizer and top dressing. Basal fertilizer generally 10-12.5 kg, 1.5-2.5 kg per mu, and 0.3% foliar spray is appropriate. Potassium can generally be absorbed by the soil and will not be lost. However, measures such as “small meals†should be adopted on sandy soils with poor fertility retention. Generally, they are best applied to melons and other high-potassium crops and have a wide range of applications. Large amount of use.
The appearance of potassium chloride is white or light yellow crystals. Sometimes it contains red iron salts and is easily soluble in water. It is a high concentration of available potassium fertilizer, which can be used as base fertilizer and top dressing. The amount of mus must be 8-10 kg, and the amount of top-fertilizer is 5-7.5 kg. The scope of application is relatively small compared to potassium sulfate, and chlorine-sensitive crops such as grapes, potatoes, tobacco, etc. must be prevented from using, so as to avoid “chlorine harmâ€. In addition, potassium chloride is not suitable for use in saline-alkaline soils, but chloride ions in chlorides promote photosynthesis and fiber formation, and are particularly suitable for the application of fiber crops such as hemp.
To correctly distinguish and use these two fertilizers, it should be noted that:
1. When buying potash fertilizer, first of all, see if the appearance meets the above explanation;
2, to see the bag logo, the implementation of standards, the implementation of potassium sulfate is the original Ministry of Chemical Industry promulgated by HG/T3279-1990, the implementation of the national standard GB6549-86 potassium chloride;
3, can not simply consider the price, mainly depends on its nutrient content.
At present, there are many unqualified products on the market, so farmers are advised to ask their distributors for fertilizers when they purchase fertilizers. They can also ask the distributors for inspection reports, or consult the soil fertilizer station or the fertilizer inspection department to avoid being deceived.
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