石膏是食用菌菌种生产和栽培中必不可少的配料,一般用量占培养料的1～3％,主要作用是提供硫素和钙素,调节培养料的pH值。磷石膏是氮、磷高效复合肥生产中的付产物,其主要化学成份为CaO30—31.5％、SO_340—43％、P_2O_51.0—1.8％,还含有其它一些微量元素。在食用菌栽培中使用磷石膏代替石膏和部分磷肥做培养料,不仅可以降低食用菌生产成本,又为三废利用闯开一条新路。我所和市磷肥厂于1987年首先在蘑菇和平菇栽培中进行使用磷石膏试 Gypsum is an indispensable ingredient in the production and cultivation of edible fungus strains. Generally, the dosage is 1 to 3% of the culture material, and the main function is to provide sulfur and calcium and to adjust the pH value of the culture material. Phosphogypsum is a byproduct of the production of nitrogen and phosphorus efficient compound fertilizer. Its main chemical composition is CaO 30-31.5%, SO_340-43%, P_2O_51.0-1.8%, and contains some other trace elements. The use of phosphogypsum instead of gypsum and part of phosphate fertilizer in edible fungi cultivation as culture material can not only reduce the production cost of edible fungi but also break new ground for the utilization of three wastes. I and the city phosphate fertilizer plant in 1987 first mushroom cultivation and mushroom cultivation in the use of phosphogypsum test