The study was carried out to verify the empirical equation Y=K[(T-T₀)D]^π for predicting the amount of nitrogen,mineralization in soil by submerged incubation method;and in tre equation,the amount of NH₄-N released from the soil is tre function of soil effective accumulated temperature.The soil used for experiment was a gleyed paddy soil in the suburbs of Shanghai.Incubation experiment and chemical analysis in laboratory as well as field and micro-plot experiments were conducted.