Ammonium sulfate‘s application methods and precautions

      Ammonium sulfate (IUPAC-recommended spelling; also ammonium sulphate in British English), （NH4）2SO4, is an inorganic salt with a number of commercial uses. The most common use is as a soil fertilizer. It contains 21% nitrogen as ammonium cations, and 24% sulfur as sulfate anions.
      1.Uses


(NH4)SO4，7783-20-2

       The primary use of ammonium sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is released and forms a small amount of acid, lowering the pH balance of the soil, while contributing essential nitrogen for plant growth. The main disadvantage to the use of ammonium sulfate is its low nitrogen content relative to ammonium nitrate, which elevates transportation costs.
      Ammonium sulfate, also known as thiamin, is the first production and the use of a nitrogen fertilizer. Usually as the standard nitrogen, a nitrogen content of 20% and 21%. Pure white crystals of ammonium sulfate, Hygroscopicity, its hard to caking, easy to save, soluble in water. Physiological acidic ammonium sulfate available nitrogen for rice, fruit, vegetables and other crops. For soils, the most suitable neutral ammonium sulphate soils and alkaline soils, and is not suitable for acidic soils.
      2.Ammonium sulfate method of application are the following:
       (1) as basal fertilizer. Ammonium sulfate as basal fertilizer shout bury in soildeeply, in order to facilitate uptake by plants.
      (2) as top dressing. This is the most suitable method of application. Depending on the type of soil to determine the amount of ammonium sulfate fertilizer. Retain water and fertilizer on the poor performance of the soil, to be phased topdressing, each dosage should not be excessive; retain water and fertilizer on the soil of good performance, each dosage can be more appropriate. How much fertilizer soil moisture also have a greater impact, especially dry, application of ammonium sulfate must pay attention to timely watering. As for when the paddy as top dressing should be drained off dry, and attention should be administered simultaneously combine Gengba. In addition, when the application of ammonium sulfate of different crops there are also significant differences, such as for fruit trees, may ditching of Shi, Shi ring or fertilizing.
       (3) more suitable for the kind of fertilizer. Because ammonium sulfate no adverse effects on seed germination.
       3.Ammonium sulfate administration should pay attention to the following questions:
       (1) can not be alkaline ammonium sulfate fertilizer and other fertilizers or alkaline substances or mixed use, to prevent lowering fertility.
       (2）should not be on the same piece of land long term application of ammonium sulfate, or cause compaction of soil become acid. If it proves necessary when applied, may be appropriatewith the application of lime or organic fertilizer. It must be noted can not be mixed fertilizer ammonium sulphate and lime to prevent the decomposition of ammonium sulfate, resulting in loss of nitrogen. Generally be separated by combined application of both the 3 to 5 days.
       (3) Ammonium sulfate is not suitable for application in acidic soils