Abstract
In this paper, the nitrogen forms of lacustrine sediments and their roles in biogeochemical cycles were studied. The effects of nitrogen on water-sediments - physical, chemical and biological processes in submerged plant systems, and understanding the physiological and ecological effects and feedback mechanism of submerged macrophytes on eutrophic water bodies can provide a scientific basis for lake endogenous pollution control. The in situ experiments were used to analyze the spatial distribution of ammonia nitrogen concentration, total organic carbon concentration, nitrification activity and the number of ammonia-oxidizing bacteria in Shahe reservoir and the Yangwa depression. Combined with the pollution characteristics and actual characteristics of the two sections, it is found that the concentration of nitrogen and the nitrifying active water at the two gates of Shahe reservoir and Yangwa gate are similar.
