Potassium sulfate is a chlorine free, high-quality and efficient potassium fertilizer
Potassium sulfate has small hygroscopicity, not easy to agglomerate, good physical properties and convenient application. It is a good water-soluble potassium fertilizer and the main raw material for making chlorine free nitrogen, phosphorus and potassium compound fertilizer. Potassium sulfate is also a chemically neutral and physiologically acidic fertilizer. Potassium sulfate is a chlorine free, high-quality and efficient potassium fertilizer, especially in the planting of chlorine sensitive crops such as tobacco, grape, sugar beet, tea tree, potato, flax and various fruit trees. Potassium sulfate compound fertilizer is produced by low-temperature conversion of potassium chloride, chemical synthesis and spray granulation process. It has good stability. In addition to the three main nutrient elements of N, P and K necessary for plants, it also contains medium and trace elements such as s, CA, Mg, Zn, Fe and Cu. This fertilizer is suitable for all kinds of cash crops, especially chlorine sensitive crops. The main components of potassium sulfate compound fertilizer are map (monoammonium phosphate), DAP (di ammonium phosphate) and ammonium sulfate (mainly obtained by neutralizing surplus sulfuric acid and gas ammonia at low temperature). There are also a small amount of impurities such as potassium sulfate and urea, such as calcium sulfate, iron, aluminum and magnesium salts of phosphoric acid, and a small amount of unreacted potassium chloride.
Precautions for use of potassium sulfate
1. Potassium sulfate is a physiologically acidic fertilizer. Because crops absorb more or faster potassium ions than sulfate ions, it will lead to rhizosphere soil acidification, so as to improve the availability of soil phosphorus and medium and trace elements. This physiological acidification is particularly important for rice seedling raising in North China. In order to cultivate strong seedlings and reduce diseases and insect pests, it is required to control the pH value of seedling bed soil or nutrient soil of rice seedling raising at 4.5 ~ 5.5. Therefore, in addition to adjusting acid with sulfuric acid water and applying an appropriate amount of ammonium sulfate nitrogen fertilizer, potassium sulfate should be used as potassium fertilizer, 50 grams per square meter or 5 grams per seedling tray. This is very helpful for acidifying rhizosphere soil.
2. Improve the pertinence of potassium sulfate fertilizer application. Potassium sulfate has a broad spectrum to various soils and crops, but its price is high, so it is better to use steel on the blade. When there are several different soils and crops at the same time, priority should be given to the most needed crops or soils. For example, if cash crops such as trees and vegetables need potassium sulfate more than general field crops; In field crops, legumes, rape, potato and sugar crops need potassium sulfate more than other crops; Saline alkali soil and sandy soil in arid area need potassium sulfate more than ordinary soil.
3. Balanced fertilization. The balanced fertilization mentioned here refers to the combined application of potassium fertilizer, nitrogen, phosphorus fertilizer and other nutrient fertilizers. A large number of production practices and scientific experiments have proved that only by applying the necessary and lack nutrients of crops and closely cooperating with other agricultural production measures, can the comprehensive benefit goal of high quality, high yield, high efficiency and environmental protection be realized. Among them, special attention should be paid to controlling the amount of fertilization at an appropriate level through soil measurement and fertilization, and preventing the crop from calcium and magnesium deficiency due to excessive one-time potassium application.
4. It is mainly used in chlorine avoiding crops, such as tobacco grass, tea tree, grape, sugarcane, sugar beet, watermelon and potato. Increasing the application of potassium sulfate not only improves the yield, but also improves the quality. Potassium sulfate is more expensive than potassium chloride and has less supply. It should be mainly used in cash crops sensitive to chlorine and fond of sulfur and potassium, and the benefit will be better.
