(1) Content: Ammonium chloride, abbreviated as ammonium chloride, has a nitrogen content of 24% to 25%; Ammonia produced by the synthetic ammonia industry is linked to the alkali industry.

(2) Properties: ① Good physical properties, slightly higher moisture absorption than ammonium sulfate. ② Easily soluble in water, fertilizer aqueous solution exhibits acidic reaction Stable chemical properties, non volatile and non decomposing.

(3) Application: ① Suitable as base fertilizer and topdressing, not as seed fertilizer. ② Suitable for long-term application in rice fields. Because: ① Cl - in paddy fields is prone to leaching and will not cause harm to the soil. ② The presence of Cl - in the soil can inhibit the activity of Trichobacterium nitrite, thus inhibiting the Nitrification of NH4+into NO3- in the soil, and reducing the leaching of NO3-. ③ Avoid using chlorine crops to avoid affecting crop yield, especially quality. If fertilizer containing Cl - is applied, it should be applied early before sowing to prevent Cl - from leaching out. ④ Suitable for cotton and hemp crops. The presence of Cl - is beneficial for the accumulation of carbohydrates in the aboveground, increasing the strength and length of fibers. ⑤ Under alkaline conditions, ammonia volatilizes and loses nitrogen. Therefore, it cannot be mixed with alkaline substances for storage and application. ⑥ It belongs to physiological acidic fertilizer. Due to selective absorption by crops, it can cause environmental acidification. After ammonium chloride is applied to the soil, its impact on the soil is greater than that of ammonium sulfate. Long term application can enhance soil acidity and cause significant leaching of Ca2+, as the solubility of CaCl2 is greater than that of CaSO4. Large amount of ammonium chloride (especially acid soil) shall be applied with lime and Organic fertilizer. ⑦ Apply deep soil cover, especially on calcareous soil.