Catch Crop Residues Stimulate N₂O Emissions During Spring, Without Affecting the Genetic Potential for Nitrite and N₂O Reduction.

ABSTRACT: Agricultural soils are a significant source of anthropogenic nitrous oxide (N₂O) emissions, because of fertilizer application and decomposition of crop residues. We studied interactions between nitrogen (N) amendments and soil conditions in a 2-year field experiment with or without catch crop incorporation before seeding of spring barley, and with or without application of N in the form of digested liquid manure or mineral N fertilizer. Weather conditions, soil inorganic N dynamics, and N₂O emissions were monitored during spring, and soil samples were analyzed for abundances of nitrite reduction (nirK and nirS) and N₂O reduction genes (nosZ clade I and II), and structure of nitrite- and N₂O-reducing communities. Fertilization

SUBMITTER: Duan YF 

PROVIDER: S-EPMC6225543 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature