We investigated the direction and degree of the change of the simulated acid rains in situ on characteristics and fractionation of phosphorus by field experiments, results showed that soil acidification could help to increase the content of soil available P, microbial biomass P and phosphates activity to some extent, but the high-strength acid rain gradually retrained the population and activities of soil microbes. Correlation analysis suggested both the acid phosphates and SMB-P showed large additive effect on the available phosphorus, the relations between the contents of inorganic phosphoru...
