Effects of changes in land use structure on nitrogen input in the Pingzhai Reservoir watershed, a karst mountain region.

ABSTRACT: Optimizing land use composition to control nitrogen input into water bodies is one way to address surface source pollution in karst mountain regions. In this study, changes in land use, N sources, and spatial and temporal changes of N migration in the Pingzhai Reservoir watershed were evaluated from 2015 to 2021, and the relationship between land use composition and N input was elucidated. N was the main pollution in the water of the watershed; NO₃^- was the dominant form of N, and it did not react during migration. N came from soil, livestock manure or domestic sewage, and atmospheric deposition. Isolating the fractionation effects of source nitrogen is crucial to improve the accuracy of nitrogen and oxygen isotope traceability in the Pingzhai Reservoir. From 2015 to

SUBMITTER: Wang C 

PROVIDER: S-EPMC10208923 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature