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磷石膏是由硫酸分解磷矿,制取磷酸以及磷铵、重钙等磷肥工业的副产品。1987～1988年先后在沿海不同盐渍化程度的滨海盐土及市郊里下河的水稻土上,进行了棉花施用磷石膏试验。
Phosphogypsum is decomposed phosphate rock phosphate, preparation of phosphate and ammonium phosphate, such as calcium phosphate fertilizer industry by-product. From 1987 to 1988, coastal saline soil with different degrees of salinization and coastal paddy soil in the suburbs were successively used to test the application of phosphogypsum in cotton.