Potassium sulfate 1

Potassium sulfate is a kind of high composition of fast available potassium fertilizer, mainly from sulfate ore anhydrous potassium magnesium alum and potassium chloride as raw materials to prepare, for white or light yellow crystal particles, α- type and β- type two crystal types. α-type is hexagonal colorless crystal, β-type is rhombic crystal colorless crystal. It has a bitter, salty taste. Generally containing potassium sulfate 90% ~ 95%, potassium (K2O)50% ~ 52%, sulfur (S)16%, chlorine (Cl) less than 2.2%; In addition, there are a small amount of sodium (Na), calcium (Ca), magnesium (Mg) and bromine (Br), etc. Chemicalbook is insoluble in ethanol, acetone and carbon disulfide, easily soluble in water, and can be directly absorbed and utilized by plants, and can be used as base fertilizer, seed fertilizer and topdressing. Experiments show that applying 1 kg of potassium sulfate can increase grain crops by 6 ~ 8 kg and sugar beet by 15.5 ~ 22.5 kg. Some crops that avoid chlorine (such as fruits, flax, tobacco, tea, citrus, potatoes, etc.) can not apply potassium chloride, but potassium sulfate can be applied. Applying potassium sulfate in acidic soil needs to add lime appropriately, or mixed with phosphate powder fertilizer, which can improve the utilization rate of phosphorus without increasing the acidity of soil.

Potassium sulfate dissolved in water immediately after application to soil, and dissociated to K+ and SO2-4; One part of K+ is absorbed by plants, resulting in physiological acidic reaction, and the other part of K+ is adsorbed by soil colloid and exchanges cations such as Ca2+ into soil solution, forming CaSO4 with residual SO2-4. The latter has a small solubility and is not easily lost with water, and has a light effect on soil decalcification and acidification in neutral and calcareous soils. Application technique: Potassium sulfate can be used as base fertilizer, topdressing fertilizer, seed fertilizer and root topdressing. The concentration of Chemicalbook for external topdressing is 2% ~ 3%. Suitable for all kinds of soil, less air pollution in mountainous areas, low organic matter content of sand, gravel and other sulfur deficiency soil, can also supplement its sulfur nutrition; Long-term application of potassium sulfate in acidic soil can easily lead to soil acidification, so lime or other alkaline fertilizers should be applied. In aged paddy fields and fields with high organic matter content and strong reducability, SO2-4 in fertilizer is easily reduced to H2S(hydrogen sulfide), and potassium sulfate is generally not used. Potassium sulfate is suitable for all kinds of crops. The effect is better for cruciferous crops, onion, leek, garlic and other crops that need more sulfur or avoid chlorine.