Abstract: 【Objective】In order to analyse the dynamic water-soluble phosphorus releasing characteristic of two kinds of activated phosphorus fertilizers,Molecule structure and the function in activating materials and phosphate rock , the efficiency of phosphorus.【Method】Adopting successional extracting, Infrared Absorption Spectrum and Differential thermal ananlysis and pot experiment.【Result】The six accumulative releasing rate of the dynamic water-soluble phosphorus of the two kinds of activated phosphorus fertilizers were phosphate rock’s 3.29 and 3.59 times; the results of Infrared Absorption Spectrum and Differential thermal ananlysis indicated chemistry happened in activating materials and phosphate rock , strengthened H2PO4－ character absorption spectrum and new H2PO4－ character absorption spectrum appeared , maked phosphorus in phosphate rock translated to effective state; the results of pot trait indicated phosphorus fertilizer’ utilizer rate of the two kinds of activated phosphorus fertilizers was obviously higher than phosphate rock’s ,even higer than superphosphate.【Conclusion】compared to phosphate rock, the water-soluble phosphorus content, biomass and P use efficiency of activated phosphorus fertilizers significantly increased.

Key words: Activated Phosphoric Fertilizer, Activating materials, Infrared Absorption Spectrum, Differential Thermal Ananlysis, Activated Mechanism