Potassium chloride is the most important variety of agricultural potash in China, and its source is mainly imported. As the area of ​​potassium deficiency in Heilongjiang Province continues to expand, the amount of potassium chloride will increase year by year.
1. Nature
Potassium chloride is a high-concentration quick-acting potash with a molecular formula of KCl and 60% K2O. The fertilizer also contains about 1.8% sodium chloride (NaCl), 20.8% magnesium chloride MgCl and a small amount of chloride ion (Cl-), and the moisture content is less than 2%. Potassium chloride is generally white or light yellow in color and sometimes contains a small amount of iron salt to form a red color. Potassium chloride has good physical properties, low hygroscopicity, solubility in water, chemical neutral reaction, and is also a physiological acid fertilizer.
There is a shortage of potassium mine resources in China. There are some potash mines in Qinghai Province, which can be refined to produce potassium chloride. It generally contains K2O52%, sodium chloride 3.3%, magnesium chloride 2.1%, calcium sulfate 1.4%, and moisture about 6%. Potash fertilizer in salt lake is white crystal with high moisture content, many impurities, strong hygroscopicity and soluble in water. In recent years, due to improvements in production processes and equipment, product quality has continued to increase.
2, application technology
Potassium chloride is as suitable as base fertilizer or early topdressing as potassium sulfate, and the fertilizer efficiency is similar, but it is generally not suitable for seed fertilizer. Because chloride ions easily affect the germination of nearby seeds. Potassium chloride and ammonium chloride are applied simultaneously to become a double-chlorinated fertilizer, not only in tobacco crops and saline-alkali land, salty fields, but also in application, tea plants, grapes, potatoes, sweet potatoes, sugar beets, sugar cane, watermelons, etc., especially in seedlings or Younger people need to use less or not.
3. The reaction of potassium chloride in different soils:
(1) In acidic soils. Both potassium chloride and potassium sulfate are physiologically acidic fertilizers. Potassium ions are absorbed by crops or adsorbed by soil colloids. Chloride ions and hydrogen ions in soil colloids form hydrochloric acid (HCl), and the soil acidity is strengthened, which increases the solubility of active aluminum and iron in the soil and aggravates the toxic effects on crops. Therefore, long-term application of more potassium chloride, but also pay attention to the addition of organic fertilizer or lime to reduce soil acidity.
(2) In calcareous soil, residual chloride ions combine with calcium ions in the soil to form calcium chloride (CaCl2) with high solubility, which can be drained by rainwater or irrigation water in well-drained soil; Or areas with poor drainage will increase the chloride ion concentration in the soil, which is unfavorable for crop growth. Therefore, the amount of potassium chloride or ammonium chloride should be controlled in this area.
1. Nature
Potassium chloride is a high-concentration quick-acting potash with a molecular formula of KCl and 60% K2O. The fertilizer also contains about 1.8% sodium chloride (NaCl), 20.8% magnesium chloride MgCl and a small amount of chloride ion (Cl-), and the moisture content is less than 2%. Potassium chloride is generally white or light yellow in color and sometimes contains a small amount of iron salt to form a red color. Potassium chloride has good physical properties, low hygroscopicity, solubility in water, chemical neutral reaction, and is also a physiological acid fertilizer.
There is a shortage of potassium mine resources in China. There are some potash mines in Qinghai Province, which can be refined to produce potassium chloride. It generally contains K2O52%, sodium chloride 3.3%, magnesium chloride 2.1%, calcium sulfate 1.4%, and moisture about 6%. Potash fertilizer in salt lake is white crystal with high moisture content, many impurities, strong hygroscopicity and soluble in water. In recent years, due to improvements in production processes and equipment, product quality has continued to increase.
2, application technology
Potassium chloride is as suitable as base fertilizer or early topdressing as potassium sulfate, and the fertilizer efficiency is similar, but it is generally not suitable for seed fertilizer. Because chloride ions easily affect the germination of nearby seeds. Potassium chloride and ammonium chloride are applied simultaneously to become a double-chlorinated fertilizer, not only in tobacco crops and saline-alkali land, salty fields, but also in application, tea plants, grapes, potatoes, sweet potatoes, sugar beets, sugar cane, watermelons, etc., especially in seedlings or Younger people need to use less or not.
3. The reaction of potassium chloride in different soils:
(1) In acidic soils. Both potassium chloride and potassium sulfate are physiologically acidic fertilizers. Potassium ions are absorbed by crops or adsorbed by soil colloids. Chloride ions and hydrogen ions in soil colloids form hydrochloric acid (HCl), and the soil acidity is strengthened, which increases the solubility of active aluminum and iron in the soil and aggravates the toxic effects on crops. Therefore, long-term application of more potassium chloride, but also pay attention to the addition of organic fertilizer or lime to reduce soil acidity.
(2) In calcareous soil, residual chloride ions combine with calcium ions in the soil to form calcium chloride (CaCl2) with high solubility, which can be drained by rainwater or irrigation water in well-drained soil; Or areas with poor drainage will increase the chloride ion concentration in the soil, which is unfavorable for crop growth. Therefore, the amount of potassium chloride or ammonium chloride should be controlled in this area.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
WPC Flower Boxes, WPC Flower Pots, Wooden Flower Boxes, Garden Flower Boxes
Shangyu YongSheng New Material Co., Ltd. , http://www.wpc-deckingboard.com