Potassium sulfate is a colorless crystal, hygroscopicity is small, easy to agglomerate, good physical properties, easy to apply, soluble in water, K2O content of 50%, is a good water-soluble potassium fertilizer. Can be used as water soluble fertilizer.
Can be used as seed fertilizer and root top dressing. For the amount of fertilizer acres of 1.5 to 2.5 kg, can also be formulated into 2% to 3% of the solution for the root outside the top dressing.
Potassium sulfate type compound fertilizer is produced by low temperature conversion of potassium chloride, chemical synthesis and shotcrete granulation process. The stability of the potassium sulfate compound fertilizer is better than that of N, P and K essential nutrients, , Mg, Zn, Fe, Cu and other trace elements. This fertilizer is suitable for a variety of cash crops, especially for chlorine-sensitive crops. The main components of potassium sulfate-type compound fertilizer are MAP (ammonium diammonium phosphate) DAP (diammonium phosphate), ammonium sulfate (mainly low temperature conversion of surplus sulfuric acid and gas ammonia obtained). Potassium sulfate, urea and other others there are some small amounts of impurities such as calcium sulfate, phosphoric acid iron, aluminum, magnesium and other salts and trace unreacted complete potassium chloride.
Precautions for use
In acidic soils, excess sulfate can aggravate the soil, and even exacerbate the activity of active aluminum and iron in the soil. In the flooding conditions, too much sulfate will be reduced to generate hydrogen sulfide, so that the root damage black. Therefore, the long-term use of potassium sulfate with farm manure, alkaline phosphate and lime with the reduction of acidity, in practice should also be combined with drainage measures to improve ventilation.
In calcareous soil, sulfate and calcium ions in the soil do not dissolve calcium sulfate (gypsum). Too much calcium sulfate will cause soil compaction, this time should pay attention to increase farm manure.
In the avoidance of chlorine on the focus of the use of crops, such as tobacco, tea, grapes, sugar cane, beets, watermelon, potato and other potassium sulfate not only increase production, but also improve quality. Potassium sulfate price is more expensive than potassium chloride, less supply, should focus on the use of chlorine sensitive and hi hi potassium on the economic crops, the benefits will be better.
This fertilizer is a physiological acidic salt, applied to alkaline soil can reduce soil pH.
On the cruciferous crops and other crops need more sulfur, the effect is better, should be assigned to use priority.
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