Linkage between N₂O emission and functional gene abundance in an intensively managed calcareous fluvo-aquic soil.

ABSTRACT: The linkage between N₂O emissions and the abundance of nitrifier and denitrifier genes is unclear in the intensively managed calcareous fluvo-aquic soils of the North China Plain. We investigated the abundance of bacterial amoA for nitrification and narG, nirS, nirK, and nosZ for denitrification by in situ soil sampling to determine how the abundance of these genes changes instantly during N fertilization events and is related to high N₂O emission peaks. We also investigated how long-term incorporated straw and/or manure affect(s) the abundance of these genes based on a seven-year field experiment. The overall results demonstrate that the long-term application of urea-based fertilizer and/or manure significantly enhanced the number of bacterial amoA gene copies leadin

SUBMITTER: Yang L 

PROVIDER: S-EPMC5324132 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature