Superphosphate is also called phosphatic fertilizer, it is a kind of phosphorus fertilizer that has weak water solubility and is mainly used in the cultivation of straw rotting fungus such as Button mushroom.
Adding phosphatic fertilizer to compost of straw rotting fungus can supplement the insufficiency of phosphorus and calcium. At the same time, it can also promote the decomposition activity of microorganism, which is good for the fermentation and maturity of compost. It can also combine with excessive free ammonia in compost and form ammoniated superphosphate, which can prevent the dissipation of ammonium nitrogen in compost. What’s more, phosphatic fertilizer is also a kind of buffering agent, which has the efficacy of improving physical and chemical properties of compost. In general, the dosage of Phosphatic fertilizer in the cultivation of mushroom is 0.5% to 1%.