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Application method: (1) Potassium chloride is not suitable for application on chlorine sensitive crops such as tobacco, sugar beet, sugar cane, potato, grape and the like. (2) It can be used as base fertilizer and top dressing, but it is not suitable for seed fertilizer. Because potassium chloride fertilizer contains a lot of chloride ions, it will affect the seed germination and seedling growth. When used as a base fertilizer, it is usually necessary to apply potassium chloride to the soil in combination with cultivated land 10 to 15 days before sowing. When topdressing is used, it is generally required to apply after the seedling grows. (3) It is necessary to master the application amount of potassium fertilizer according to local conditions. Generally, the application rate per acre (667 square meters) is controlled between 7.5 and 10 kg. For sandy soils with poor fertilizer retention and water retention capacity, the principle of a small number of multiple applications should be followed. (4) Whether potassium chloride is used as a base fertilizer or as a top dressing, attention should be paid to early application to facilitate the leaching of chloride ions to the lower layer of the soil through rainwater or irrigation water to remove or mitigate the damage of chloride ions to crops.
Matters needing attention: (1) Potassium chloride combined with nitrogen fertilizer and phosphate fertilizer can better exert its fertilizer efficiency. (2) It is not advisable to apply potassium chloride to the saline-alkali soil with poor water permeability, otherwise it will increase the salt damage to the soil. (3) When applying potassium chloride to sandy soil, it is necessary to apply organic fertilizer. (4) Acidic soil is generally not suitable for the application of potassium chloride. If applied, it can be combined with lime and organic fertilizer.
Source: China Cooperation Times (Wang Xiaobo)
Main characteristics: Pure potassium chloride is white or light yellow or brick red crystal. The active ingredient (K2O) content is usually about 60%. It has strong hygroscopicity, is easily soluble in water, and its solubility in water with temperature. The increase is increasing. Potassium chloride is most suitable for use in potassium-deficient soils and field crops such as rice, wheat, cotton, corn, and sorghum; it is also suitable for application on neutral calcareous potassium-deficient soils.
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