The characteristics of ammonium sulfate fertilizer, the usage and dosage of ammonium sulfate fertilizer, the role of ammonium sulfate fertilizer

What should I pay attention to when applying ammonium sulfate fertilizer? We will answer this question for you.

Synthetic ammonium sulfate fertilizers are white crystals, such as those made from coking or other petrochemical production by-products, which are bluish green, brown or light yellow. The content of ammonium sulfate is 20-21%, and it contains a very small amount of free acid. It is easily soluble in water and has low hygroscopicity, but it can also absorb moisture and agglomerate in rainy seasons, which will corrode the packaging bag. Pay attention to ventilation and dryness during storage. Ammonium sulfate is stable at room temperature, but when 4 alkaline substances act, it also releases ammonia gas like all ammonium nitrogen fertilizers. After ammonium sulfate is applied to the soil, it will gradually increase the acidity of the soil through the selective absorption of crops, so ammonium sulfate is the same as physiological acid fertilizer.

Ammonium sulfate is suitable for general soil and prepared crops, and smells of ammonium-loving crops. It can be used as base fertilizer, top dressing and seed fertilizer. For compulsive fertilizer, it is more economical and effective to apply a large amount of nutrients to the soil near the root system during the first few days of crop growth. However, it must be applied when there is no water droplets on the stem and leaf surface to avoid damage to the crop. For rice, it should be applied deeply or combined with cultivating fields to avoid the loss of chlorine due to the common progress of nitrification and denitrification.

The dosage of ammonium sulfate as seed fertilizer must be small, generally 10 catties per mu, mixed with 5-10 times decomposed organic fertilizer or fertile soil, and be careful not to contact with seeds. When planting rice seedlings, 5-10 catties of ammonium sulfate can be used per mu, combined with decomposed organic fertilizer, superphosphate, etc., to make a thin slurry, which is used to dip the roots of the seedlings, and the effect is very good.

In acidic soils, ammonium sulfate should be used in conjunction with farm manure, and should be used in conjunction with alkaline fertilizers such as calcium magnesium phosphate fertilizer and lime (not mixed application) to prevent soil acidity from increasing.