By the method of scholar Warning,flooding culture mineralization characteristics of N in sediments were studied in various ponds and mineralized nitrogen were simulated in the method of one-order dynamic model.By the method of scholar Bremner,various components of organic nitrogen were determined to define the relation between mineralized nitrogen and components of organic nitrogen by path analysis.The results showed that the processing of nitrogen mineralization was different in strength and capacity when treatment groups and control group were compared,for control group was much higher.The group adding zeolite had the lowest mineralization contents and strength.Mineralization contents and strength of the group adding urease enzyme inhibitors was much higher than those of the group adding microbial.Ammonium-N in the overlying water came from the sediment mineralization,acid amide N was mineralized most,ammonium nitrogen and amino sugar N were mineralized less and unidentified N was mineralized least.By experimental results,there existed no relation between unidentified N and mineralized nitrogen inhydrolizable N,there existed a significant direct path coefficient between acid amide N,ammonium nitrogen,amino sugar N and unidentified N and mineralized nitrogen,which showed that the above nitrogen all had a contribution to mineralized nitrogen,ammonium nitrogen had a significantly high path coefficient to mineralized nitrogen,which showed that ammonium nitrogen contributed most to ammonium-N in overlying water.