What is potassium nitrate?

What is potassium nitrate? How to use potassium nitrate? Please also ask netizens to help introduce that potassium nitrate is widely used in the agricultural market. Potassium nitrate is a binary compound fertilizer, and potassium nitrate is a chlorine-free potassium and nitrogen compound fertilizer, and the total content of plant nutrients potassium and nitrogen can reach about 60%. With good physical and chemical properties. Therefore, the farming network has sorted out the advantages and matters needing attention of potassium nitrate, which are listed in detail below for netizens' reference. The advantages of potassium nitrate: potassium nitrate is also known as potassium nitrate, fire nitrate, potassium nitrate is dissolved by sodium nitrate and potassium chloride together, recrystallized. Potassium nitrate fertilizer is 100% plant nutrients, all soluble in water, is a nitrogen-free potassium, nitrogen compound fertilizer, to provide plants with potassium, nitrogen up to 60% of the role, and no residue of harmful substances. Potassium nitrate can provide nutrients for crops under any conditions. it can be applied to four seasons crops and will not cause salt accumulation in the soil. Because potassium nitrate is non-volatile, it can be applied directly to the soil surface without covering. At the same time, nitrate nitrogen and potassium contained in potassium nitrate are a large number of elements necessary for crop growth, and there is a good coordination between them, which can promote each other to be absorbed by crops and promote the absorption of other nutrient elements. therefore, potassium nitrate is often used as high concentration potassium fertilizer in agriculture. Because potassium nitrate has no chlorine and no sodium, low salt index, good water solubility but no moisture absorption, high nutrient content and fast fertilizer effect, potassium nitrate is often used as topdressing fertilizer. Potassium nitrate application points for attention: first, potassium nitrate is easy to move after being applied to the soil, which is suitable for topdressing crops, but it is not suitable for base fertilizer and seed fertilizer, and should be applied in dry land, but not in paddy field. Second, potassium nitrate is suitable to be used as extra-root topdressing (foliar fertilizer), and the most suitable concentration is between 0.6% and 2%. Third, when soaking seeds with potassium nitrate, it is best to use 0.2% potassium nitrate aqueous solution for seed soaking and seed dressing. Fourth, potassium nitrate can not be used as potassium sulfate fertilizer, because potassium nitrate contains nitrogen fertilizer will cause crop nitrogen fertilizer excess. When gold nitrate is used as base fertilizer, it should not be mixed with calcium superphosphate and fresh organic fertilizer to avoid nitrogen loss. Potassium nitrate is also a raw material for the manufacture of gunpowder, so special attention should be paid to preventing combustion, high temperature and explosion during storage and transportation, and contact with flammable substances is prohibited. What kind of fertilizer can't be used as a kind of fertilizer? what's the function of zinc sulfate?