摘要：Nitrification is the crucial nitrogen biogeochemical cycles processing in various freshwater ecosystem. This processing was effected by various environmental factors. However, the effect of environmental factors on potential nitrification rates (PNRs) of riparian sediment are yet not known until now. This aims of this study to investigate the influence processing of three environmental factors on PNRs variation for riparian sediment using the single factor incubations experiment. The results shown that (1) PNRs obviously varied with the pH values changes in cultivation systems and the peak of PNRs was detected in pH7.5 cultivation group; (2) PNRs showed a significantly increasing trend with the cultured temperature increased from 10 to 28 0C, whereas, PNRs showed an obvious decline when temperature was exposed to 370C;⑶ The PNRs rapidly increased when ammonia concentration increasing from 10 to 50 mgL1, whereas, it significantly decreased when ammonia concentration increased to 100 mgL1. Therefore, the maximum value of PNRs was detected in the cultivation environment with a temperature of 28T, pH of 7.5 and ammonia concentration of 50 mgL1, respectively.
