1.Ammonium sulphate, chemical formula (NH4)2SO4,with nitrogen 20%-21%,abbr.AS.2.Ammonium sulphate is a kind of fast-acting nitrogen fertilizer, NH4+ is easy to be absorbed by soil after spraying.3.As physiologically acidic fertilizer,long-term application of ammonium sulphate will increase the acidity of soil.4.If use ammonium sulphate to calcareous soil continuously or single, less soluble calcium sulphate will formed and cause soil harden ammonia volatiliazation. It is easy to cause nitrifica

1.Plant normal growth and development need a variety of mineral nutrition elements, and all kinds of available nutrients in soil may not conform to the tree nutrition demand, need through the artificial method according to the proportion to fertilization, plant nutrition elements that is the principle of balanced fertilization.2.Balanced fertilization usually has at least NPK nutrient elements, as well asmicro-nutrientsin the soil.

In order to make plants getting nutrients supply in time and give full play to the fertilizer effects, the environment conditions and characteristics of plants must be taken into consideration.That is weather for fertilization, soil for fertilization and crops for fertilization.Weather, fertilization technology is determined according to local rainfall,temperature and sunshine conditions.Soil for fertilization is to determine the fertilization technology according to soil fertility level and che

Advantages of organic fertilizer and chemical fertilizer combination.1.Organic fertilizer and chemical fertilizer, chemical fertilizer can promote the mineralization of organic nitrogen, increase organic fertilizer effect, and the presence of organic nitrogen can promote chemical nitrogen immobilization, decrease the loss of inorganic nitrogen, are conducive to crop growth and development.2.The combination of organic fertilizer and chemical fertilizer can improve the efficiency of phosphorus, pr