The experiment of the effects of fertilization on productivity and soil environment was studied using leaching incubation
at intervals. The soil N mineralization parameter was obtained with the first order dynamic equation. The effects of long-term
organic residue cycling on soil organic matter (SOM), active organic matter (AOM), readily oxidizable organic matter (ROM) and the relationships among N 0, SOM, AOM, ROM were discussed. The results showed that N 0 increased significantly under organic residue cycling of
rice cropping system in red soil area of China. Obviously seasonal change characteristics of N 0 could be observed. However, the parameter K was opposite to N 0. The more N 0 was, the smaller K was. K varied from 0 0233 to 0 0799?week -1. It could increase the content of SOM, improve the quality of SOM, and enhance its activities after organic residue cycling in the rice cropping of red soil area of China. Significant correlations among N 0, and SOM, AOM, ROM was observed.