多元磷石膏为氮、磷高效复合肥生产中的副产品,主要成份为CaO30—31.5%、SO_40—43%、P_2O_41.0一1.8%、MgO0.1—1.2%、SiO_21.1—3.2%、Fe_2O_30.1—0.4%、ZnO 微量,可直接供给食用菌生长发育之需要.本文主要报道,1988年在平菇生产中进行的磷石膏不同量、栽培形式及配方试验结果.一、试验方法栽培试验分三组,第一组室内床架式栽培:设5个处理,2次重复,每小区用棉籽壳5公斤.(1)棉籽 Polybasic phosphogypsum is a by-product in the production of nitrogen and phosphorus compound fertilizer. The main components are CaO 31-31.5%, SO 40-43%, P 2 O 41.0-1.8%, MgO 0.1-1.2%, SiO 2 21.1-3.2%, Fe 2 O 30 .1-0.4%, ZnO trace, can be directly supplied to the needs of the growth and development of edible mushroom.This paper mainly reports in the mushroom production in 1988 different amounts of phosphogypsum, culture forms and test results formula I. Test methods Cultivation test Divided into three groups, the first group of indoor bed frame cultivation: set 5 treatment, 2 repetitions, each with 5 kg of cotton seed hulls (1) cottonseed